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?
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.
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.