i7 920 and 940 OCPost Date: 2009-02-22 |
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tworattle 
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Joined: 20 Dec 2008 Online Status: Offline Posts: 80 |
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 Topic: i7 920 and 940 OCPosted: 22 Feb 2009 at 5:55pm |
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Hey just curious because I know that the i7 965 has an unlocked multiplier which makes it easier to OC. How does DS OC the 920 and 940 then and how do they get them so far overstock? Just something that I have been thinking about. Thanks.
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DST4ME
DS ELITE 
Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 22 Feb 2009 at 6:10pm |
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we have seen 920 from 3.2 to 3.8
we have seen 940 from 3.5 to 3.8 the i7 just oces very well specially the 920. liquid cooling gives you the best chance at the highest number but the cpu itself has alot to do with it also, some just don't oc well. keep in mind the 920 and 940 are stuck with 1333MHz ram while the 965 can use 1800+ Edited by DST4ME - 22 Feb 2009 at 6:11pm |
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Dsnewb210
Senior Member 
Joined: 01 Oct 2008 Online Status: Offline Posts: 972 |
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Posted: 22 Feb 2009 at 6:11pm |
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From what ive read its not just an unlocked multiplier, its also a memory divider that dictates the speed of ram you are able to utilize.. For a 920/940 you would use 1333mhz and a 965 would handle 1600+.
Edited by Dsnewb210 - 22 Feb 2009 at 6:13pm |
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DST4ME
DS ELITE
Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 22 Feb 2009 at 6:12pm |
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both 920 and 640 have the same memory controller, only 965 can bypass it.
Edited by DST4ME - 22 Feb 2009 at 6:12pm |
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Dsnewb210
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Joined: 01 Oct 2008 Online Status: Offline Posts: 972 |
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Posted: 22 Feb 2009 at 6:13pm |
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Yep.. I just read about that now... Further proves how worthless the 940 really is lol.. |
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DST4ME
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Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 22 Feb 2009 at 6:18pm |
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I know where you are coming from, but with a 940 you are almost guarantee that no matter what you will get an OC of 3.5 or 3.6 or higher, cause the 940 is starting at 3.0.
but the 920 you could end up with 3.20GHz. not sure if that is worth the price or not. |
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justin.kerr
DS Veteran 
Joined: 06 May 2008 Online Status: Offline Posts: 5084 |
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Posted: 23 Feb 2009 at 10:09am |
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How is the 920 or 940 stuck with 1333Mhz ram? My 920 has the ram running @ 1672Mhz with 7,7,7 timings ..?
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DST4ME
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Posted: 23 Feb 2009 at 3:22pm |
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form intel:
if you oc the chip you can go upto 1600 I think. Edited by DST4ME - 23 Feb 2009 at 3:23pm |
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justin.kerr
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Joined: 06 May 2008 Online Status: Offline Posts: 5084 |
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Posted: 23 Feb 2009 at 4:13pm |
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I see, I have seen others with a lot higher than mine, but maybe its a crap shoot when you get that high?
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DST4ME
DS ELITE
Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 23 Feb 2009 at 4:22pm |
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What the motherboard can run is different then what the CPU can do. your motherboard can probably run 2000MHz ram but your CPU will not be communicating with it that fast.
Edited by DST4ME - 23 Feb 2009 at 4:23pm |
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justin.kerr
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Joined: 06 May 2008 Online Status: Offline Posts: 5084 |
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Posted: 23 Feb 2009 at 4:49pm |
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with Everest ulitimate my memory read & write bandwidth are both over 20,000Mb/s read nearly 21,000mb/s, lol. I have not seen any 965's with 1600 mhz ram, overlocked to similar speeds doing any better? So I can't see how the CPU is not communicating fast enough?
 Edited by justin.kerr - 23 Feb 2009 at 4:50pm |
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DST4ME
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Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 23 Feb 2009 at 4:57pm |
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As I said, when you oc the chip you can go to 1600MHz but pass that its gonna be tough. you see your fsb has been raised to 208.3 vs the default which is 133, at 133 fsb you would be comunicatig with the ram at 1600MHz.
try running a 2000MHz ram with your 920 and tell me what happens |
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justin.kerr
DS Veteran
Joined: 06 May 2008 Online Status: Offline Posts: 5084 |
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Posted: 23 Feb 2009 at 5:12pm |
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I really don't see why I need to go out and but 2000mhz ram, when lots of other people have done it on there 920's? 1600 works fine for me because I used an 8 multi on the ram, if the B-clock was pushed much more, my ram would not be able to OC any more, and I would have to revert to a 6 multi, which would bring the ram down bellow 1300mhz.
Also the I7 does not have a FSB. lol
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DST4ME
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Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 23 Feb 2009 at 5:22pm |
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Justin, if you search my posts in this forum from before the i7 even came out, you will see me telling people that the main reason I love the i7 is because it longer suffers from fsb, its not qpi, when I said fsb I was refering you to look at your pic, which does list it as fsb.
Edited by DST4ME - 23 Feb 2009 at 5:22pm |
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justin.kerr
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Posted: 23 Feb 2009 at 5:28pm |
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I know, just busting your chops. lol
I don't know what the current record is, but a while back, 2530mhz ram speed was the record for a 920
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DST4ME
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Posted: 23 Feb 2009 at 5:33pm |
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a 965 will always run faster with the same speed ram at and above 1600
Edited by DST4ME - 23 Feb 2009 at 5:33pm |
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justin.kerr
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Posted: 23 Feb 2009 at 5:35pm |
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When you say run faster, what part do you mean? Core clock? or ?
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DST4ME
DS ELITE
Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 23 Feb 2009 at 5:45pm |
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I mean it will do tasks faster.
Edited by DST4ME - 23 Feb 2009 at 5:45pm |
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justin.kerr
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Posted: 23 Feb 2009 at 5:51pm |
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Ok, I see what you mean. What ram speed are you going to put into your new build?
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DST4ME
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Posted: 23 Feb 2009 at 5:52pm |
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I'm going with 965 so either 1866 or 2000 I guess.
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justin.kerr
DS Veteran
Joined: 06 May 2008 Online Status: Offline Posts: 5084 |
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Posted: 23 Feb 2009 at 6:08pm |
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hmm, well I was hoping to compare Everest, but with that much higher ram speed, it woild not be comparable. lol
It would be interesting to see the differences @ the same ram speed.
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StLBluesFan
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Joined: 19 Nov 2008 Online Status: Offline Posts: 67 |
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Posted: 23 Feb 2009 at 9:52pm |
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FYI, my 940 was DS overclocked to 4.025. Works great, liquid cooled of course, temps are a non-issue.
Edited by StLBluesFan - 23 Feb 2009 at 9:52pm |
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Dan
******************** HAF 932/940 @3.85 LC/6GB DDR3 @1400Mhz Asus Rampage II Extreme SLI BFG GTX 280 std clocks Dell 30" Display Vista 64-bit |
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DST4ME
DS ELITE
Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 23 Feb 2009 at 10:07pm |
 very nice boss 
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Onkel_Ken
DS Veteran
Joined: 17 Dec 2008 Online Status: Offline Posts: 2961 |
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Posted: 23 Feb 2009 at 10:19pm |
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My 920 was DS overclocked to 3.591 on the V8 "air" and I just love how it performs. With the HAF 932 case DST4ME recommended it stays nice and cool also at that overclock.
Every chip overclocks differently and it is like winning the lottery when you get one that overclocks well.
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Velox X/AMD 5900X/MSI X570 Pro Carbon MB/32GB DDDR 3600 DSPS/850W PS/500GB Samsung 980 Pro/1TB Samsung 970 EVO Plus/500 GB HDD/Sound Blaster AE-7/EVGA FTW3 Ultra RTX 3080 10GB/Liquid CPU cooler AIO/
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StLBluesFan
Groupie
Joined: 19 Nov 2008 Online Status: Offline Posts: 67 |
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Posted: 24 Feb 2009 at 10:51am |
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Yep, that HAF 932 case is amazing. Love it. And I still can't get over that it's exhausting cool air, I'm so used to PCs blowing warm air into the room.
 Couldn't be happier with the whole package.
Frankly, I'll never buy from other than DS and I'll heartily recommend DS to anyone who asks.
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Dan
******************** HAF 932/940 @3.85 LC/6GB DDR3 @1400Mhz Asus Rampage II Extreme SLI BFG GTX 280 std clocks Dell 30" Display Vista 64-bit |
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mordrick78
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Joined: 01 Feb 2009 Online Status: Offline Posts: 93 |
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Posted: 05 Mar 2009 at 9:45pm |
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Don't get me wrong, I know everyone is tooting how wonderful the i7 920 at OC is, but it's also been proven that X4 940 will OC up too 4.2 with stability on air cooled! Correct me if I am wrong, but the just set the OC record with the x4 of 6.5 ghz! D***! But the build a system with both chips with the same parts, and you come up with a savings of $208 going with X4...IDK about everyone else...but savings is savings!
Plus when it comes to the ram speed...I have heard from numerous people on here, and DST4me is one of them that you will not notice the difference in ram speed |
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DST4ME
DS ELITE
Joined: 14 Apr 2008 Online Status: Offline Posts: 36758 |
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Posted: 05 Mar 2009 at 9:55pm |
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you will not notice a difference between 1333 and 1600 but you should see the difference between say 1333 and 2000MHz.
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