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Overclocking Video cards

Post Date: 2010-03-18
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police215 View Drop Down
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Posts: 452 		  Quote police215 Quote  Post ReplyReply bullet Topic: Overclocking Video cards
    Posted: 18 Mar 2010 at 2:44pm
looking to overclock my 2 GTS 250 1gb OC video cards for more performance. Is it possible to OC them since they say there OC out of the box? Would it even make a difference?
 
I'm not allowed (wife) Wink to buy anything form my rig for a while. I have to keep the little lady happy ya know.

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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 18 Mar 2010 at 4:08pm
pretty easy, downlaod MSI afterburner, you can use the Kombuster to check stability, but also try it in games to make sure it is stable...I can guide you some. lol
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Posts: 36758 		  Quote DST4ME Quote  Post ReplyReply bullet Posted: 18 Mar 2010 at 6:14pm
MSI Afterburner

Nvidia Drivers----AMD Drivers
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police215 View Drop Down
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Posts: 452 		  Quote police215 Quote  Post ReplyReply bullet Posted: 22 Mar 2010 at 7:46pm
Justin,
 
 Can you quide in tweeking out the video cards? I have MSI afterbunerand Kombuster.

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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 22 Mar 2010 at 8:45pm
for best overall power, keep the core and shader linked, then up the core 10Mhz, and run Kombuster, if no errors, no issues, keep going till you hit an error, or the Nvidia driver stops responding. lol then back down 10Mhz, then do the same thing with the RAM.
the linked shader/core will get you the best overall gains, unless one of your cards has a really bad shader clock, some do, in that case, you might be better off un-linking, and getting more out of the core, and leave the shader low, just matters the card.
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police215 View Drop Down
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Posts: 452 		  Quote police215 Quote  Post ReplyReply bullet Posted: 23 Mar 2010 at 8:42pm

Understood, but i have a few questions,

 
For Kombuster, what setting should i use when starting
 
I have 2 - 1920x1200 monitors
 

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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 23 Mar 2010 at 8:52pm
use stability test at 1920x1200
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police215 View Drop Down
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Posts: 452 		  Quote police215 Quote  Post ReplyReply bullet Posted: 23 Mar 2010 at 8:56pm
What temp is getting to hot that i should be looking at? also am I looking for like black particals (kinda like an old moive reel to reel movie flash on the screen? And I'm run Kombuster at full screen with the setting that you just mentioned. Just wanna make sure i dont fry the cards!! LOL

Edited by police215 - 23 Mar 2010 at 8:58pm

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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 23 Mar 2010 at 9:07pm
use the fan control setup, keep temps under 80C if possible
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police215 View Drop Down
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Posts: 452 		  Quote police215 Quote  Post ReplyReply bullet Posted: 29 Mar 2010 at 1:32pm
Does it matter what PCI-E slot the second video card sits in? The MOB says the slot 1 16x (i think, i dont know it said 8x too)
slot 3 16x/8x
slot 5 8x
 
I have card 1 in the primary slot and the second card in slot 3 The problem is, the GPU 1 is running a lot hotter that GPU 2
 
Now card 1 fan is right above card 2
I'm 99.9% sure that the card 1 is sucking up cards 2 heat causing the higher temps.
 
the temps of GPU1 vs GPU 2 is about 10c difference


Edited by police215 - 29 Mar 2010 at 1:41pm

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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 29 Mar 2010 at 7:23pm
top 2 slots, they will fit very close together,
SLI= more heat
this is typical.
 
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police215 View Drop Down
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Posts: 452 		  Quote police215 Quote  Post ReplyReply bullet Posted: 21 Apr 2010 at 11:39am

with Afterbuner how do i get the Voltage Core to unlock? I went into the setting and checked the box (unlock Voltage Core) but I still can not raise or lower it.

Also I have some Benchmark score questions
when you want to find the benchmark on your stock settings, how long to you let it run?
Once the benchmark stock setting score is achived, then you would start tweaking the cards 10mhz at a time. After running kombuster, do you benchmark again?  
 
Scoring,
You are looking for the highest number score from the stock score. As long its stable.
 
While running Kombuster, do you need to run full screen? or can i run it at max res with the window 800x600 and achive the same results?


Edited by police215 - 21 Apr 2010 at 11:41am

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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 21 Apr 2010 at 1:20pm
you have poopy VRM's can't be adjusted.
are you benchmarking the Kombuster program? never done that. lol
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