Tadaa

So, thought I'd come here and see if there are any options left. Here's my story:

A while ago I decided to upgrade in the graphics department, by replacing my Sapphire HD4830 for a Sapphire HD4890 Vapor-X OC. I was able to raise the core all the way up to 981Mhz, with the memory running at 4500. Sadly I ended up trading this card for an equally priced Asus ENGTX275, as the ATI had problems running Aion due to driver issues.

I went for the 275 because of the Guru3D overclocking guide I read about it. To put it simple, I'm having trouble getting even half their final gains on the core/shader. The guide concluded with speeds of 743Mhz on the core, 1605Mhz on the shader and 1282 on the memory.

Now all I've been able to achieve is 698/1515/1250. The memory seems capable of some more, but taking either the core or shader clock beyond this results in driver crashes in games and benchmarks (Vantage). Is this it for my card, or are there ways to climb up?

IntelFloyd

Must be your card.
Im at 713core and 1260mem (FTW speeds) and have no issues. IVe gone higher but I dont need those speeds unless im benching.
How are your temps under load?

Vlasov_581

i think all cards are different.....698/1515/1250 is still vey good.....have you tried eVGA Voltage Tuner?

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Tadaa

I was under the impression the 275 couldn't be software voltage modded.

Vlasov_581

oh ooopps.........support for 260/280/285/295 but no 275?

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Tadaa

Haha, yeah bummer. I've looked into 275 volt mods, but haven't found a guide clear enough for me.

nolonger

When you try overclocking further, try to raise shader before core. Shader always has to be over 2x core. Are they still linked? A big part of Shader stability is temperature, what are yours during load?

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Tadaa

They are still linked yes. Taking the shader any further results in driver crashes. Heat doesn't seem to be an issue (yet), the core doesn't even get passed 74c load.

subliminally incorrect

as far as my experience with overclocking asus cards, they suck at it. just be glad that you can oc your card at all.

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Open1Your1Eyes0

Also for the GTX260, that's only the 65nm editions. The only GTX285 supported is that Quad-SLI Classified Edition. And only the Dual PCB Editions of the GTX295 are supported as well.

All the other cards have cheap VRM's so it's physically impossible for them to do software voltage tuning even if the support was given.

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