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Help overclocking AMD 7970 / water block recommendation. - Page 2

post #11 of 14
Also use bios switch 2, as sometimes 1 is locked lower.
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post #12 of 14
Thread Starter 
Quote:
Originally Posted by huhh View Post

Xspc blocks don't have active cooling, you won't be able to push you VRMS any more than before. Possibly less because you won't even have any air circulating over your VRMS.

Ohhhhhhhhh thanks for the heads up thumb.gif
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post #13 of 14
Quote:
Originally Posted by Tjj226 Angel View Post

Ohhhhhhhhh thanks for the heads up thumb.gif

Sorry just want to clarify, i made my last post on my phone. When i said no active cooling, i meant on the VRM's. So only the Core and memory have cooling. Here's a thread about it.

http://www.overclock.net/t/1366829/nickel-plated-heatkiller-gpu-x-79x0-vs-xspc-razor-hd-7970-full-coverage-vga-block-new-design

Just reading through that would stop me from buying most XSPC products. Especially their GPU block...
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post #14 of 14
Quote:
Originally Posted by huhh View Post

Not all reference models carry a unlocked reference bios. Take mine for example it's voltage locked to 1.256v, AB, Trixx mod, GPU Tweek can't increase it past 1.256v even though it's a reference. They started voltage locking all reference models so they can't go past 1.256/1.3v with a 20+ power limit. Now if you look at non-ref models some have a hardware voltage lock, hence not ref.

With water cooling you should be able to hit past 1.3v without a problem, but you'll still have to edit your bios to get past that as most 7970's can hit 1.3v with AB or Trixx anyways. Were talking about water cooling, which is the whole point of overclocking well past what air can do.

it's more of a upper voltage limit lock than actual voltage locked, which still hinders people that place their cards on water.

I am water cooling my card. But I don't see the need to go past 1200mV, as that allows my card to OC to 1200/1800 which is a pretty good OC. I haven't tried to up the voltage much more than that, the slider in AB does go up to 1.3 though, if that means anything.
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