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gtx 560 Ti 1.2vcore

post #1 of 9
Thread Starter 
Anyone run a gtx 560 Ti on 1.2vcore? i know the cap is supposed to be 1.15. however my temps never go above 65 and i have good airflow in my case to passively cool the VRMS (correct me if i dont know what im talking about) haf 922 with 3 extra 120mm fans.

Im wondering if ill be able to squeeze a wee bit more performance out of my card and if its worth risking it...

i can see what benchmarking does to you now lol

any thoughts...?
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post #2 of 9
Go for it, and if it blows up. Come back and tell us.
post #3 of 9
Mine won't let me overvolt past 1.075v....
post #4 of 9
I havent gone past 1.1v and temps sat on 68c

What clocks are you trying for?
post #5 of 9
I haven't gone back 1.1v on my 560Ti either.
post #6 of 9
not worth blowing up a card for 5 more fps

Edit: Yay im past 2000 posts!!!!!!!!
post #7 of 9
Quote:
Originally Posted by pmrballer123 View Post
not worth blowing up a card for 5 more fps

Edit: Yay im past 2000 posts!!!!!!!!
This, I dont see alot of nvidia cards taking 1.2 volts...Even older series like the 200 series dont like that much voltage.
    
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post #8 of 9
Using Nibitor + NVflash you can bump up the max volts to 2.25 or something like that. Once that's done, the higher volts are available for selection, at least in MSI Afterburner. Can't remember if I checked in Galaxy XtremeTuner.
http://www.overclock.net/nvidia/9896...gtx-4-5-a.html
(It's changed in the Fermi Volts menu item, not on the main UI).

I found that I could take the memory up to around 2400 at stock core, or take core/shader to a shade above 1000/2000 with stock memory, but couldn't do both. Turned out that I was getting around 114 fps either way (800/1600/2400) vs (1000/2000/2000).
Throwing more volts at the card wasn't enough to get it past 1000. This is in an SLI config, which is a bit more sensitive than a single card.

I've tried it, and what I've noticed is that excessive voltage makes the card unstable. Can't say if it's a volts or temp issue though. I was most likely approaching 80c. The Galaxy heatsink is practically corrugated/ridged, and I haven't gotten around to lapping it yet.

Another thing to consider, is that the overclocking utilities don't allow changing the "bumped shader" clocks, but you can when you flash the bios. Changing the "bumped shader" value according to the guide resulted in an increase in fps from 105 to 114.

I lucked out with a pair of good cards (Galaxy 560 Ti GTX) and can maintain a pretty good overclock, but had to back down on the volts from 1.5ish down to 1.1. Temps approached 80c which may be the culprit.

After you do this, make sure to find your individual overclocking limits separately for core and mem clocks.

I ended up leaving the cards at 1000/2000/2000 for no other reason that it was a nice round number and didn't see the point of spending hours tweaking for another 0.5 fps.

Alan
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post #9 of 9
Thread Starter 
thats some good info thanks. ive decided that if i want to get more performance, risking damaging my hardware isnt the way to go, and that i have to pour more money into my system instead
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