Windows Experience Index: an indepth lookPost Date: 2007-08-05 |
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Kelly ![]() Senior Member ![]() Digital Storm Customer Service ![]() Joined: 13 May 2008 Online Status: Offline Posts: 791 |
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For Windows Vista™ Introduction The overall PC performance is represented by the base score. The base score is derived from 5 subscores for each of the following 5 attributes:
The Windows Experience Index is useful for the following: 1. When buying a new PC, it is useful for determining the quality of the Windows experience a buyer can expect from a particular PC. 2. When upgrading a PC, the index is useful for estimating the overall improvement a PC user can expect to get when replacing or adding a new hardware component. 3. When buying software, the software package may include the recommended Windows Experience Index base score a PC should have in order to run the particular software application well. If a PC has a higher base score than the score recommended by the software, the software will run well on it. About This DocumentThis
document describes the Windows Experience Index (WEI) Model, what it is
useful for, how the scores are computed, and how consumers can use it. The scale is useful when comparing hardware components and when comparing whole PCs. The scale was created so that a full score point of improvement usually means significant additional capabilities in the particular sub area, while a better fractional score means an incremental improvement. The integer number of a base score is referred to as the Windows Experience Index level. For example a PC with a Windows Experience Index base score of 5.3 is considered a level 5 PC. Over time, as systems become more advanced, we expect to introduce higher levels of 6 and beyond. This will be done approximately every 12-18 months, as new innovations in hardware become available. When new base scores are introduced, existing scores will not change (i.e. a PC with a base scored of 2.2 today will score a 2.2 in the new updated index, unless its components are upgraded). Base score definitionsEach base score level defines an improved experience over lower levels. A PC will work well running scenarios of its level in addition to scenarios of lower levels. The base score levels at a glance:
Base Score Level Applications and Scenarios Description 1.0 – 1.9 Basic performance. Productivity applications, IM, web, email, simple games - like Solitaire, educational games. Minimum specification needed to run Windows Vista™. 2.0 – 2.9 Improved responsiveness. Same applications as a base score of 1.0 – 1.9. PCs will run Windows Vista but in most cases will not be Aero capable. 3.0-3.9 Aero
graphics, Media Center with standard definition TV, basic graphical
games, basic performance while running high-end graphical games. Minimum specification needed to run Windows Vista Premium features, including the new Aero user interface. 4.0 – 4.9 Snappy performance, high definition video, high resolution monitors, dual monitors. Very good performing PCs. 5.0 – 5.9 Fast moving games with amazingly rich graphics, 3D modeling, high-end multimedia and high performance applications. Top end of the PC market for the Vista time frame. A base score of 6 and greater will be defined when new hardware innovations reach the market. The following are detailed descriptions of each of the base score levels: A base score of 1.0 is intended to reflect the minimum specification needed to run Windows Vista™. PCs
that meet this level will run Windows Vista™ in a basic, but acceptable
manner. This is a “catch all” level assigned to any machine that can
realistically be upgraded to Windows Vista™ but won’t meet level 2
specifications. A
base score of 2.0 represents the mainstream Windows Vista upgrade
target system. This level of PC may run Windows Aero but users may see
noticeable performance issues from time to time, especially on PCs with
base scores less than 2.5 and/or 64MB of graphics memory. Performance
issues may also be noticeable when opening many application windows at
the same time or when using very large monitors. This
is the lowest capability Windows Premium Logo PC that will ship with
Windows Vista™ pre-installed. Windows Vista will generally enable Aero
automatically on level 3 machines. Aero will perform quite well on level 3 machines with single monitors. With
dual monitors (especially larger than 1280x1024), users may see
noticeable performance issues from time to time, especially on PCs with
base scores less than 3.5 and/or 128MB of graphics memory. 4.0 All Windows Vista features will run well with snappy performance. HD playback and recording of one HD stream will work well. 3D games and other high-end 3D applications will run acceptably on Level 4 machines. Multi-tasking
will be quite good on these machines (when an application makes use of
this capability). Many mid to high level 4 PCs will have dual core CPUs. 5.0 Level
5 PCs will dramatically exceed the Windows Premium logo requirements.
They will easily run Aero-Glass on multi-monitor systems at high
resolution. First person shooters, multiple HD
streams, video creation, high end multimedia applications are all
characteristic scenarios of people who will be using Level 5 systems. As
Level 6 machines are not defined yet, it is possible that the highest
performance and capable Level 5 machines may be re-leveled as level 6
in the future (i.e. that may happen if the new hardware is evaluated
before the index is updated with the new capabilities). 6.0 Base
scores of 6.0 and higher are not defined yet. They will be defined when
the time comes and new innovations in hardware allow new capabilities.
From past experience, it is expected this will happen at a rate of once
every 12-18 months. Computing the Base ScoreThe Windows Experience Index score – often called the base score – is always a decimal value greater than zero. E.g. the base score is a number like 3.6 or 5.6. Since a system’s performance is limited by its slowest component, the final system base score is the lowest value of the five subscores. In the example below, the WEI base score is 3.8 and is determined by the processor’s score of 3.8. Note: The model logic is tolerant of one subscore being below the threshold for a particular level by 0.1. For example, assume that in the above example, the memory score was 4.0 and the processor score 3.9. This would mean that the processor score would marginally be the only item keeping the base score below level 4. The model addresses this issue by rounding up a single value that is below the next round level by 0.1. Computing Each SubscoreEach sub score in the index was created to measure the performance of a critical piece of hardware. The scores are calculated by measuring one or more relevant performance attributes, and then converting the values (normalizing) to a score between 1.0 and 5.9. In this section you can read what is tested for each subscore. The CPU ScoreThe CPU score was created to measure the processor performance when tasked with common Windows usage activities. The processor is assessed on the following items: 1. Compression and decompression using the LZW compression algorithm 2. Compression and decompression using the Windows Vista compression algorithm used for hibernation files, ReadyBoost and other features 3. Encryption and decryption assessment 4. Computing hashes 5. Encoding of video The results are normalized and weight averaged in order to arrive at the final CPU sub score. The Memory ScoreThe memory score measures the bandwidth of moving data into and out of memory in Mega Bytes per Second. The higher the bandwidth, the better the memory. Not having enough memory is a limiting factor on performance. As a result, the amount of memory in the system constrains the score value. The amount of system memory is determined by the overall system memory minus any memory reserved for graphics (if any). The amount of memory limits are:
The Graphics ScoreThis score is intended to reflect how a system will run Aero (desktop composition) and playback Windows Media Video. It measures video memory bandwidth (in mega bytes per second) and converts it to a score between 1.0 and 5.9. If the graphics hardware does not support DirectX 9 (DX9) graphics, then the system receives a graphics score of 1.0 regardless of driver type. If the system supports DX9, but does not have a WDDM Driver (Windows Vista Display Driver Model) the system will then receive a graphics score of 1.9 at the most. The Gaming ScoreThe gaming score measures the frames per second the graphics card can handle for various textures. Additional notes: · If the graphics card does not support D3D 9 then it receives a Gaming score of 1.0. · If D3D 9 is supported, the card is DX9 capable and has a WDDM driver, it will score at least 2.0. · If the score is greater than or equal to 5.0 and the graphics sub-system does not support Pixel Shader 3.0 then the score is limited to 4.9 The Disk ScoreThe disk score measures disk bandwidth (in Mega Bytes per Second). The conversion to an index number is set up in a way that all modern disks will score at least 2.0. Using the Windows Experience IndexThe Windows Experience Index is very useful for consumers when buying a new PC, when upgrading an existing PC and when buying new software. This section explains how the index can be used in each of these situations. When Buying a New PCWhen buying a new PC a customer is usually confronted with the dilemma of which PC to choose. A PC’s value is multi-dimensional. The value is a collection of many attributes including performance, industrial design, noise, size, weight, power consumption, connectors, capacity of disk & memory, peripherals (DVD burner, etc.), networking, included software, and more. The most difficult aspect to understand is how well the PC will perform when running Windows and other software and the type of experience you can expect. The only way to do this today is to look at a long and arcane list of technical terms and try to figure out what the combination of them would mean when running Windows. This is very difficult to do, even for the most experienced customers. This is where the Windows Experience Index comes in. It can help you while shopping for a new PC: 1. First, determine the base score level of PC you are looking for. This can be done using the “base score levels table” on page 4. 2. Second, look for PCs with that base score level or higher. For example, if you determined you need a PC with a base score of 3.0, look for PCs at level 3.0 and above. 3. To determine which PC to buy, look at all the additional characteristics each PC provides and determine which package if the right one for you. 4. To compare the experience you can expect to get from 2 different PCs, you can check their WEI base scores as well as their subscores for each of the five areas. When Upgrading a PCThe WEI score is very useful when upgrading a PC. The following examples illustrate how the WEI score can be used when considering an upgrade. Ordering upgrades directly from the PC manufacturerRachel, a PC user decides to upgrade her PC after starting to view videos and editing photos on it. She goes into “Performance Information and Tools” from the control panel. Her system rating shows a WEI base score of 2.1. She has determined that a base score of 3.0 or greater is sufficient for her needs.
On the bottom, next to the logo of the PC manufacturer, Fabrikam, she notices the following link: “View ways to increase your rating”. After clicking it, she is directed to the Fabrikam web site which suggests a few upgrade options for her. She chooses the components she is interested in and is given directions for a self upgrade or for sending her PC in for the upgrade to level 3. Note: This link will be provided by certain PC manufactures that offer upgrades. Manually Upgrading a PCConsider a customer who owns the following PC:
The customer has recently bought a digital camera and is now using the PC with many more programs running concurrently. Due to the added load on the PC, the customer feels the PC is less responsive than it used to be. He thus goes into “Performance Information and Tools” in the control panel to try to discern how to improve the PC performance. Looking at the WEI results presented there, it is clear that the base score of the PC is significantly impacted by the memory score which is by far the lowest score. To improve performance, it seems that adding more memory or putting in faster memory if possible would be the method of choice for improving performance. Checking the amount of memory in the PC by clicking on the “View and print details”, the customer discovers that the PC has only 512MB of RAM available. This indicates that the low memory score is probably due to lack of memory. The conclusion would be to check if the PC can support more memory and upgrade it. Consider this second PC:
The new score is the following:
The new base score is now determined by the primary hard disk subscore, which is now the lowest of the subscores. When Buying SoftwareWhen buying software, knowing your PC base score is very useful. With it you can determine if the software you are buying will run well on your PC. Microsoft is working with software vendors to use the base score and subscores for recommended system requirements. We expect to have some software vendors using it at the time of Windows Vista launch and many more following the launch. When
determining if your PC can run a specific software package, look for
the system requirements section on the retail product packaging. The
recommended WEI score is the base score the software vendor recommends
your PC should have to get an adequate experience when running this
software application. The packaging may also include a minimum WEI base
score which would indicate the minimum performance a PC should have to
be able to run the application. Example:
SummaryThe Windows® Experience Index is a new feature built into Windows Vista™. It can considerably help consumers understand how well Windows Vista will perform on a specific PC, and make the buying process of new PCs, hardware upgrades, and software simpler. The following topics about the Windows® Experience Index were covered in this document: 1. Description of the Windows Experience Index 2. How the scores are calculated 3. How the index can be used in the following cases: a. When buying a new PC b. When upgrading a PC c. When buying software Edited by skyR - 22 Oct 2007 at 7:00pm |
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Kelly ![]() Senior Member ![]() Digital Storm Customer Service ![]() Joined: 13 May 2008 Online Status: Offline Posts: 791 |
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![]() This is my score... |
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Larry ![]() Senior Member ![]() ![]() Joined: 03 Aug 2007 Online Status: Offline Posts: 167 |
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Very informative post. Thanks for the information. I am torn on XP v. Vista. I want the DirectX 10 yet I am not convinced that the drivers for Vista are where they need to be.
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Kelly ![]() Senior Member ![]() Digital Storm Customer Service ![]() Joined: 13 May 2008 Online Status: Offline Posts: 791 |
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that is why I dual boot. I use all my everyday stuff on Vista and game on XP!
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silenceofthehams ![]() Groupie ![]() Joined: 02 Aug 2007 Online Status: Offline Posts: 48 |
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Hmm... I have a friend who built his own computer and he has Xp with Dx 10
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Kelly ![]() Senior Member ![]() Digital Storm Customer Service ![]() Joined: 13 May 2008 Online Status: Offline Posts: 791 |
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sure, as with anything out there, the hackers are going to find ways to make stuff work where they're not supposed too. It is a very stripped down version of dx10 and with that being said, I dare him to run Crysis on it ;)
If you want a true DX10 experience, you will have to go with Vista. period. |
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silenceofthehams ![]() Groupie ![]() Joined: 02 Aug 2007 Online Status: Offline Posts: 48 |
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Yeah but if i get vista to run Dx 10 all my other games will be horrible because of vista. And my friend just downloaded Dx 10 straight from the Microsoft download site.
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Kelly ![]() Senior Member ![]() Digital Storm Customer Service ![]() Joined: 13 May 2008 Online Status: Offline Posts: 791 |
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again, this is why you dual boot. And, he didn't dl from microsoft because unless they lied to everyone, it is for Vista only. Like i said, there is a group that released a stripped down version for xp, but it's not an official release from microsoft.
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Lunchbox ![]() Groupie ![]() Joined: 01 Aug 2007 Online Status: Offline Posts: 96 |
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To be honest i have never heard of Dual Booting.....can you explain what that is exactly and how you go about setting it up
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Kelly ![]() Senior Member ![]() Digital Storm Customer Service ![]() Joined: 13 May 2008 Online Status: Offline Posts: 791 |
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you load 2 operating systems on one hdd. Like in my case I have one hard drive partitioned to be 2 drives. I installed XP on one partition and Vista on the second partition. SO your computer will read that your 1 drive is 2 drives. Then when you turn your pc on, you can choose which OS to boot too. :)
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Lunchbox ![]() Groupie ![]() Joined: 01 Aug 2007 Online Status: Offline Posts: 96 |
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well whenever i get my computer i might be asking you for a little more detail
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silenceofthehams ![]() Groupie ![]() Joined: 02 Aug 2007 Online Status: Offline Posts: 48 |
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Yeah how do you load two on? I know you have to make a hard drive partition but i have no clue how to do that. And isn't it expensive to by vista and Xp?
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tirnaog ![]() Groupie ![]() Joined: 07 Aug 2007 Online Status: Offline Posts: 211 |
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Mine is now a 5.0! Broke the barrier with the 4gigs.
I run the Vista64 and playing the games on it is no problem. Old Civ4 with everything pumped up is running better then it ever did on my old Xp32 system.
And Bioshock Demo was more then impressive. The DX10 graphics was WOW! :)
Can't wait for the Crysis demo on the 25th
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Yes Tirnaog!!!! Good job!
Does the Bioshock demo actually use DX10? Maybe mine is crap. Or, maybe I should just buy the game. Who wants to buy Bioshock for Kelly? :-P Just kidding... ... .. . sorta. |
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Aw I wanted to play bioshock. :'(
My graphics card doesn't have enough pixel shaders for it to work :( Edited by silenceofthehams - 01 Sep 2007 at 5:14pm |
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tirnaog ![]() Groupie ![]() Joined: 07 Aug 2007 Online Status: Offline Posts: 211 |
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Yes, Bioshock uses the DX10. Its listed in the options.
All my options were listed at high.
The graphics were really impressive and my graphics card is one of the entry level DX10 ones.
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ah yeah... I think when I get some cash I may go out and buy it. But I found the demo a little lacking and tired. Hopefully the full game isn't so.
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EdH63 ![]() DS Veteran ![]() Joined: 01 Sep 2007 Online Status: Offline Posts: 1826 |
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So, you think Vista 64 bit is a good investment? Should I have you guys partition my hard drive or me to house XP and Vista? I am putting 4 gigs Corsair RAM in it. To build this correctly, what will I need in this rig to have a rockin gaming system for the newer games and DX10, and still run my operating system for my work? I really do want Vista but I've heard so many downers about it.
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Vista has come around. I am starting to like it more than XP.
As far as 64bit, I would read up on the differences more indepth. Some people think that it's the way to go, others think that it's well... not. So to answer your question, yes we can dual boot your system for a fee, but be sure you want to go to 64bit before ordering it. IM Tirnaog. He uses 64bit and loves it. |
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tallpaul ![]() Newbie ![]() ![]() Joined: 16 Oct 2007 Online Status: Offline Posts: 8 |
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32-bit OS can only access 3 gig of RAM, so with 4 gig you may as well at least try a 64-bit OS. Otherwise your system will never use or even "see" that last gig or RAM, except you'll see it every time you boot up in your BIOS messages, and it will remind you that it is wasted.
That said, it does at least ensure you get your DDR2 running in dual channel mode: If you put 3 sticks of 1GB each, thinking that a 4th stick is pointless, the third stick would then not be able to run in dual channel mode, since they have to have a "twin" to work with. It would function, it would just be slow, and you wouldn't even know it! I can't wait to get my new rig, and as soon as MS allow it, I expect to see my numbers in the sixes without making any upgrades. |
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Stonevulture ![]() Newbie ![]() ![]() Joined: 18 Sep 2007 Online Status: Offline Posts: 70 |
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I agree. My new DS system rates at 5.9; when MS ups the index to 6+, I expect I'll be somewhere in the 6.x range without doing anything.
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tirnaog ![]() Groupie ![]() Joined: 07 Aug 2007 Online Status: Offline Posts: 211 |
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Mine went down to 4.8 after I installed the new nVideo drivers for my 8500 :(
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My DS PC:
CPU: Intel i7 2700K OCed 4.4ghz MB: {not sure :( } Memory: 8 gigs Video: 570 GTX 1gb nVideo Sound: Built in OS: Win7 64 Ultimate |
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Jingping ![]() Groupie ![]() Joined: 11 Sep 2007 Online Status: Offline Posts: 193 |
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Yo, Kelly, do you seriously want Bioshock? I have a copy of it, but I don't like the game. Thought I'd give it a try, but just wasn't to my taste, although the graphics WERE pretty damn good
![]() W/regards to the OP, excellent post. I think I ran a 5.8 on the index the last time I played around a bit with it. Edited by Jingping - 16 Oct 2007 at 12:51pm |
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nomec ![]() Senior Member ![]() ![]() Joined: 26 Aug 2007 Online Status: Offline Posts: 530 |
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my experience index score is 5.6... everything is at 5.9 except for my memory.
I have 2gb of pc1066 RAM on my new DS system. Anyone know why I don't have a 5.9 for memory? Is my memory faulty or something? Edited by nomec - 16 Oct 2007 at 8:05pm |
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EdH63 ![]() DS Veteran ![]() Joined: 01 Sep 2007 Online Status: Offline Posts: 1826 |
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Mine is 5.9 on everything except the disk drives. Scored a 5.5. I wished I had gotten the 10,000 rpms. Maybe I'll switch them out.
Edited by EdH63 - 16 Oct 2007 at 10:29pm |
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gdhart ![]() Senior Member ![]() Joined: 21 Sep 2007 Online Status: Offline Posts: 131 |
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Ed, you can also go with 2x7200 RPM drives in a RAID 0 as I have done. I get a 5.9 on the disk drive preformance.
nomec - I've got 4 Gb of 800 Mhz Ram and my memory rating is 5.7, the only one that is below 5.9. Edited by gdhart - 16 Oct 2007 at 10:35pm |
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850W PSU/Pro Case
Q6600-G0 2.7GHz nVidia 680i A1 Revision 4GB 800MHz XMS2 1x500 GB WD, 2x500GB WD RAID-1 2x500GB Ext nVidia GeForce 8800GTX 768MB ATI TV Wonder 650 Air Cooled Stage 3 |
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Kelly ![]() Senior Member ![]() Digital Storm Customer Service ![]() Joined: 13 May 2008 Online Status: Offline Posts: 791 |
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Jingping, I do appreciate it but I already have it and don't like it, but I am sure someone in the office would love it if you wanted to donate it :) As far as the MS Index score guys, I honestly don't know what makes some better than others. Like mine is 5.9 all the way down, but there are a couple of you with better Hardware than mine that are getting lower. So, All I can recommend is just experiment.
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commast ![]() Senior Member ![]() Joined: 11 Oct 2007 Online Status: Offline Posts: 262 |
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Mine is a real 5.9, but i can also get a score of 9.9 if i want too
![]() Edited by commast - 16 Oct 2007 at 11:55pm |
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tallpaul ![]() Newbie ![]() ![]() Joined: 16 Oct 2007 Online Status: Offline Posts: 8 |
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Pray tell, how? MS claim it is currently not possible to get over 5.9
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Stonevulture ![]() Newbie ![]() ![]() Joined: 18 Sep 2007 Online Status: Offline Posts: 70 |
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The memory score is based on memory operations per second, so it's not only about how fast your RAM is, but also about how well you can keep the pipeline full. I also have 2gb RAM @ 1066MHz, and I suspect that the reason I get 5.9 for memory is because I have an overclocked quad-core CPU. If you have a dual-core, you may be less able to keep the memory pipeline full. If you have a quad-core already, then you've got me stumped. Edited by Stonevulture - 17 Oct 2007 at 1:17pm |
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nomec ![]() Senior Member ![]() ![]() Joined: 26 Aug 2007 Online Status: Offline Posts: 530 |
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I have a QX6850 oc'ed @ 3.33ghz. I keep getting 5.6 for my memory every time so I don't know what is going on. It clearly would say 5.9 if there were no issues.
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mystikmedia ![]() Newbie ![]() Joined: 17 Oct 2007 Online Status: Offline Posts: 2 |
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I believe that rating for memory is based on amount rather than speed. I suspect that 4 GB would probably give you a 5.9. I know my Xeon workstation has slower RAM, but it has 16 GB of it, and the rating is 5.9.
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commast ![]() Senior Member ![]() Joined: 11 Oct 2007 Online Status: Offline Posts: 262 |
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By cheating
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commast ![]() Senior Member ![]() Joined: 11 Oct 2007 Online Status: Offline Posts: 262 |
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I have 2 GB of Corsair 1066 and my score for RAM is 5.9.
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mystikmedia ![]() Newbie ![]() Joined: 17 Oct 2007 Online Status: Offline Posts: 2 |
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Ah. Must be based on a combo of size and speed then.
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