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7970 Ghz. Voltage locked?

Last response: in Graphics & Displays
December 27, 2012 7:32:41 PM

Hi all,

As I said in another thread, I'm getting the XFX Double Dissipiation Ghz. Ed. Now, I read in a couple of other threads and on other sites that the XFX Double Dissipiation 7970 is voltage locked. My question comes in two parts:

-What does voltage locked mean? (Limitation in OC'ing?)
-Is the XFX Double Dissipiation Ghz Ed. I'm getting voltage locked?

Thanks in advance!

a b U Graphics card
December 28, 2012 9:32:04 AM

7970 Ghz Edition are usually Locked.
They can't be Overclocked much.

But 7970 can be Overclocked higher than Ghz Ed.
December 28, 2012 10:10:50 AM

Sumukh_Bhagat said:
7970 Ghz Edition are usually Locked.
They can't be Overclocked much.

But 7970 can be Overclocked higher than Ghz Ed.

This is an over-generalization. It depends on the specific model... some 7970s are voltage locked and so are some GHz edition cards. Also, which card "overclocks much higher" has everything to do with luck of the draw and nothing really to do with rather or not you get a GHz edition or a regular edition 7970.

The 7970 DD BE originally was not voltage locked, but at some point midway through this past year they altered the BIOS to make it voltage locked. I know that the 7970 DD BE GHz edition was voltage unlocked as of a month or two ago, and I assume it still is, but I don't own one so don't know for sure.
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December 28, 2012 10:42:37 AM

Ok thanks. And a regular 7970 DD? Would that be a better option then? Or would the difference be minimal when you OC the 7970 Ghz mildly and the regular 7970 more?
December 28, 2012 11:01:32 AM

To be honest, neither of the XFX cards is a great candidate for overvolting if you are planning to overvolt + overclock. If you want to overvolt, you really should get a card that has a beefier power design (the XFX cards have reference power circuitry I believe) and good VRM cooling (the XFX cards definitely do NOT have good VRM cooling - or at least they didn't when I had one) like the MSI Lightning, the Sapphire Vapor-X, or the ASUS Matrix cards.
December 28, 2012 11:09:24 AM

Well, I'll list the options. These cards are all an option to get:

XFX HD7950 Double Dissipation
XFX HD7950 Double Dissipation BLACK
SAPPHIRE Radeon HD 7950 with Boost
MSI R7950 Twin Frozr 3GD5/OC
ASUS HD7950-DC2T-3GD5-V3

XFX HD7970 Double Dissipation
XFX HD7970 Double Dissipation BLACK
XFX HD7970 Double Dissipation GHz Ed.

EVGA Geforce GTX 670 FTW

When you take in regard that I only plan on doing mild OC'ing (because these cards are all very good), which one would you pick?
December 28, 2012 11:39:33 AM

For mild OCing, I'd recommend whichever is cheaper between the 7970 options listed there.

You don't need to overvolt for mild to moderate overclocking.
December 28, 2012 11:58:33 AM

Ok thanks for the help :)  .