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GTX 770 SC and overclocking?

916 Views 11 Replies 5 Participants Last post by  Cyro999
How can i overclock when precision X doesnt allow more than 6% more power? and the video driver crash when i even do a 50MHZ clock?

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106% is hard locked by the BIOS, only way to up that is a bios reflash.
Depending on your benchmark you may not be able to push past 50Mhz and every chip is different.
Check if EVGA has a newer bios, perhaps there is a bug or something. Not the same card obviously, but I can get +150 without issue and probably more with the same 106% limit. Save your bios and check it out with Kepler Bios Editor to see if maybe they were cautious on the actual power draw limits.
And where can i fetch newer bioses?
Quote:
Originally Posted by sonarctica View Post

And where can i fetch newer bioses?
Either edit your own using GPUZ and NiBiToR (if you choose to pursue this then I can explain more in depth) or just search up a pre-made BIOS online that has already unlocked the voltage. Then you'll need nvflash to flash your new BIOS onto your card, as well as a tool like the HPUSBBoot tool that lets you boot from a USB drive. You can install Windows 98 DOS to the drive so that you can flash it. It is way less complicated than it seems.
Sorry if my post on flashing was wrong I only have personal experience flashing Fermi BIOS's.
WAit.. you can edit the bios with gpuz?
Quote:
Originally Posted by sonarctica View Post

WAit.. you can edit the bios with gpuz?
Sort of, you extract your previous BIOS with GPUZ and then edit that in NiBiToR as a seperate BIOS. Then you flash your new one.
WEll, no buttons here that lead to extractions.
100% = 230w.

That's an ecessive amount of power, these GPU's in games are usually a chunk below 200 at max oc - you won't ever be power limited even without raising it.

What is crashing with +50mhz and what load GPU clock is that read by evga program while it's running?
50-100mhz works just fine in furmark, but crashes in 3dmark 11 and bf4.
Wouldn't suggest using furmark, 3dm11 and bf4 are pretty good for testing core. Stay away from Unigine stuff if you don't want to mess around a lot, many nvidia cards have weird issues with them, specifically with boost clocks and offsets you can set. It can be very confusing for new overclockers.

The offset that you set doesn't really matter, only the actual core clock under load. EVGA Precision should tell you that.

It should probably be at around 1275-1325, bit more variance i'm not sure on silicon lottery. If you've got that, you have good OC.

Nvidia clocked 770 higher at stock. Much of the OC headroom from the 680 is already in the "stock" component - especially with gpu boost 2.0 being quite aggressive sometimes. My card clocks 1254 out of the box, my max OC is 1280 - if i give it the 1.212v instead of 1.2v in evga precision, i can get 1293.

Oh and also, if you hit power limit, it won't present itself as instability in overclock. The clocks that your card is using will just drop - same with temperature limit. Your boost and boost offset are "suggestions", not commands, technically.
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