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Disabled power limit + OCCT = Fried GTX 570

post #1 of 82
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Oh well, i've just destroyed my pride and joy in a jet of flame

My POV Gtx 570 was a beauty... it ran 3d mode @ 0.963v, overclocked to 860/1980 @ 1.038v, and 880/2000 and beyond on 1.05v.
With the Arctic Cooling AXP temps never went above 48'c.

However one thing bugged me....I used OCCT to verfiy the OC's with fullscreen hour runs, but I noticed that fps used to decrease with more voltage (eg fps with 880/2000 @ 1.05v was ~102fps, much lower than 860/1980 @ 1.038v with ~130fps)
note: Total system power draw was about 340w in these tests.

It was obvious to me that the powerlimiter was kicking in....so i got thinking, How could I call my 880/2000 oc stable, if the power limiter was kicking in and reducing clocks/power draw dynamically ???

So I set about disabling it with GPU-z and retested.......... (I was worried about the VR cooling with the AXP, so prior to the test I strapped 2x 120mm akasa apache fans to the card, blowing into the VR and VRAM areas, the result was a further 6-8'c off load temps)

Well i was impressed at first @ 880/2000 1.05v fps was ~195 in OCCT fullscreen complexity 8 !!!!
I then checked system power usage and was gobsmacked.....525w

Things were looking good, temp was hovering 44/45'c 20mins and no errors, 195 steady fps..... then POP and the computer restarted.

Tentativley i started the machine back up and low and behold, it started..... So I thought i'd got away with it...untill I fired up some BC2, then BANG/FLASH.... flame shot out and monitor went blank

Yes I'd fried my card





Hindsight is a wonderful thing.... maybe it wasn't so clever to disable the limiter and OC to 880/2000 and run OCCT

The cards in the bin, a GTX 580 is coming to replace it on Tues.

Note sure if I trust the AXP VR cooling enough to use it again, wonder if the above would have happened with better VR cooling ???? It also used to make a funny squeal as soon as i turned the computer on..which was off-putting.

Anyway you live and learn.... I've learn a harsh £250 lesson !!!!!
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post #2 of 82
sorry to see your 570 is fried

dont put in the pin, send it to me to play with

also where di you get it for £250?
    
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post #3 of 82
I don't trust any cooler that has passive VRM and Memory sinks.

For future reference though, you don't need to disable the power limiter for a stability test. Just fire up Crysis. It always catches my unstable overclocks within 10 minutes.
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post #4 of 82
Not gonna lie- that is a pretty epic way for it to go!

Sorry about the card though.
    
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post #5 of 82
Ouch

Make yourself a nice GTX570 keyring from the die so you never forget
post #6 of 82
That's odd to be honest. I've run OCCT (with power limit turned off) for 1 hour @ 875/2000 1.05v easily. And that's with temps hovering around ~74c on stock cooling.
    
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post #7 of 82
oven fix it.
lol
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post #8 of 82
Anyway, can't you RMA it?



Quote:
Originally Posted by Xylian View Post
That's odd to be honest. I've run OCCT (with power limit turned off) for 1 hour @ 875/2000 1.05v easily. And that's with temps hovering around ~74c on stock cooling.
The problem with these cards is that there are no VRM temp sensors. The core temperature means nothing.
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post #9 of 82
Quote:
Originally Posted by Xylian View Post
That's odd to be honest. I've run OCCT (with power limit turned off) for 1 hour @ 875/2000 1.05v easily. And that's with temps hovering around ~74c on stock cooling.
I agree. Something is not right here, or I am just missing something.
    
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post #10 of 82
Sorry to hear that bro..

I use 20 min of Furmark to test my OC + 30runs of Crysis GPU bench (or 60 runs of Crysis CPU bench)..

Also running Furmark is very dangerous as temps do go sky high = up to 100C on my GTX480 but I run it with open window at this winter time so temps are 90C..

But seriously Crysis benchmarks and actual game FTW..

CHEERS..
     
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