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Old 06-25-08, 09:48 AM   #13
Revs
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Default Re: GTX280/260 Overclocking Results

OK, cheers guys, i'll stick to RT. My GTX260's arrived this morning about ten minutes after getting to work . They've been teasing me all day, can't wait to get home .
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Old 06-25-08, 10:18 AM   #14
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Default Re: GTX280/260 Overclocking Results

Nice REVS, and good luck with the new cards.
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Old 06-25-08, 02:48 PM   #15
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Default Re: GTX280/260 Overclocking Results

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Nice REVS, and good luck with the new cards.
Cheers bud

OMG these things OC like nothing i've ever known. The only reason I stopped where I did is the memory wouldn't increase any more and the GPU clock was starting to scare me . The shader started to clip at 1490mhz so I backed it off 10mhz. You can see the GPU temps on the pic (FurMark only uses one card).

I'm gonna do some benching now. With the CPU at 4.05Ghz (450x9) and the cards at stock clocks I got just over P12197 Vantage points (no physics driver) which I thought was very poor indeed, but I suspect it's CPU limited at such a low res.

EDIT:
Pic removed due to a problem with RT causing BS clocks.

The max stable OC was 740/1475/1280 (100% fan, 68*C), still very pleased with that
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Old 06-25-08, 03:02 PM   #16
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Default Re: GTX280/260 Overclocking Results

That ram clock must be off right? 1500 is too low and 3000 is way too high...
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Old 06-25-08, 03:05 PM   #17
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Default Re: GTX280/260 Overclocking Results

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That ram clock must be off right? 1500 is too low and 3000 is way too high...
Yeah you're right. For some reason it messed up. When I closed and opened it again it was at stock (just the memory) and the GPU was at 740mhz. Gonna retest now.
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Old 06-25-08, 03:39 PM   #18
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Default Re: GTX280/260 Overclocking Results

Doesnt matter how much you set GPU, its tied to shader clock, you can even type 850Mhz and it will run without problem, but not speed difference, so only linked mode makes a difference.
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Old 06-25-08, 03:39 PM   #19
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Default Re: GTX280/260 Overclocking Results

Running memory at 1300(2600) now, 166.4GB/s of memory bandwidth.
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Old 06-25-08, 04:38 PM   #20
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Default Re: GTX280/260 Overclocking Results

Question for the OC experts-

I can run 721|2600 1552 linked, or I can unlink and raise the core further to 742. So it will be 742|2600 1552. Is there any real benefit after you unlink the shaders, or should I just settle for 721|2600 1552?

Best Vantage GPU score I've seen so far is 11.7k for GPU alone.

EDIT: ok Vantage linked 718|2600 1545 = 11627 GPU, unlinked 742|2600 1547 = 11706.
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Old 06-25-08, 05:08 PM   #21
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Default Re: GTX280/260 Overclocking Results

I've gone for 700/1400/1200. Well within stable limits and the fans are at 55%. I've just had a blast on Crysis and they run at 60/70*C in game. I'd say the FPS have gone up about 70% (compared to my GT's) in Crysis64, with DX9 VH (all settings forced). Very playable now with 30-60 avg FPS at 1920x1080 . AA doesn't work though

Just need to do a couple of benchies again.
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Old 06-25-08, 05:25 PM   #22
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Default Re: GTX280/260 Overclocking Results

Well that's it for my core/shader 742/1547 unlinked. Any higher = trouble.
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Old 06-26-08, 04:12 AM   #23
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Default Re: GTX280/260 Overclocking Results

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Originally Posted by slaWter View Post
Very nice Revs! Enjoy your new 260's!
Cheers

I think it was a worthy upgrade. Very pleased with how it's running. Crysis64 DX9 with tweaks is sooo smooth now . DX10 is pap though. If nVIDIA get TriSLI to scale better I might even get a third card but ATM the scaling isn't good enough IMO.
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Old 06-26-08, 04:18 AM   #24
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Default Re: GTX280/260 Overclocking Results

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Originally Posted by spajdr View Post
Doesnt matter how much you set GPU, its tied to shader clock, you can even type 850Mhz and it will run without problem, but not speed difference, so only linked mode makes a difference.
RivaTuned won't allow the GPU core speed past 740Mhz for me but over 700Mhz there was no performance gain anyhow. The shader and memory clock made a nice difference though.

Just a note about the fan. On full it is very noisey, but the ammount of air it'll blast through is amazing. It's like a leaf blower. The sweet spot is 55%, nice and quiet but with good air flow. I might mod the grill where the air comes out to increase air flow a bit.

Quote:
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Best Vantage GPU score I've seen so far is 11.7k for GPU alone.
16910 on 'P' mode, 11905 on 'H' mode But that's in SLI. Did you mean for one card?
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