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Some weirdness PNY GTX 570 XLR8

ukbilleh

ukbilleh

ukbilleh

Associate
Joined
17 Oct 2007
Posts
347
So I decided to try and start overclocking my graphics card and ran into a problem.

(1)
Any overclock I was applying was causing the card to 'switch off' and basically as soon as I put anything graphically intenisve on it would fall over and give me a black screen with no option but to hit the reset.

This was at:
820/1640/2000 with a minor increase to the voltage which I thought I may need. Nothing to precise here but I tried this a lot and nothing worked.

So for some reason I decided to go smaller on the overclock (increase till it crashed) and try no increase at all to the voltage.
I'm now running exactly the same figures above with no modification to the voltage what so ever :confused:

Is this correct? It seems that as soon as I modify the voltage in anyway the card crashes.

I have run crysis 2 with the new clocks and no voltage modification and everything is fine.

(2)
Another problem. More worrying infact is that I cannot run the graphics test in OCCT. Even at stock voltage & stock clocks it will just give me a black screen and I am forced to cold boot :/

In the first instance this would tell me something is wrong with my card but it seems to overclock well and handle crysis 2 without graphical error etc :confused:

(3)
One last thing. If I run crysis 2 @ ultra everything, 1080p, vsync on, highres textures on, DX11 off. Performance is all good, solid frame rate and looking at the gpu usage in MSI:Afterburner shows its at almost a solid 100%

However...

If I use the same settings as above but turn DX11 on the gpu usage is all over the place and nothing like what it is when DX11 is off. What is going on there? The performance is also degraded by quite a bit :/

Sorry for so many questions but they are a little awkward to search in google for results and I'm confused...
 
Ah ok had a read on another forum. Am I going about this the wrong way? I'm supposed to keep the volts as low as possible for stable. So increasing them when it doesn't need it will make it crash?

:confused: still confused lol
 
Ah bugger back to the usual instability. @ 820/1640/2000 .975v crashes a few seconds into crysis 2. No idea whats going on as those settings were fine when I made the first post.

Did just try 840/1640/200 @ various voltages all the way up to 1.080v and it crashed on every single one on the way up.

What are the chances of this sounding like a duff card? :/

My spec is i5 2500k @ 4.7, 8gb kingston hyper x blu 9.9.9.24 @ 1333, PNY GTX 570 XLR8, Corsair tx650 v2, asus p67p8 m-pro

If anyone needs them hmm
 
Max voltage on a GTX570 i believe is 1.100v, so you are pretty close to maxing out your volts. All GPUs are different, like all CPUs are different, i dont think there is anything wrong with your GPU, its just not a particularly great O/Cer of a GPU.

What i have always done with my GPUs when overclocking them, is run 2 tests back to back, 3D Mark11 and Heaven 2.5. I run both tests with the desired O/C, i then increase the core & link the shader, when both of those tests are completed and stable, i increase the core & shader again, another thing i do is move up 10Mhz at a time, testing all the time, this way i get to know exactly what my GPU is capable of. I know this is probably a long winded course for overclocking but IMO it is the best way, because you will evenutally get to a stable GPU O/C, you also will understand when more voltage is needed, that is either due to the GPU crashing or artifacting when on benchmark testing.

My current EVGA GTX570 HD SC has a factory O/C of 797, i now currently run the card @ 850/1700/2000 24/7 completely stable with a voltage set of 1.038. This O/C meets all my expectations and more tbh. I will recently be adding a 2nd i have just purchased.

Good luck with your O/C
 
Yer it just seems that no matter what I try the card just falls over and I'm forced to cold boot. Even a measley 20mhz on the core and the memory will make the card fail.

Anyones thoughts of the card failing OCCT test as soon as it starts at standard clocks? Surely this isn't normal :/
 
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