Recently we did a news post about the fact that the XFX HD 5970 Black Edition's own overclocking utility didn't offer support for 64-bit users of Windows. For the most part this was a huge fail, but the good news is that it seems XFX heard our roar and sorted the issue out.
Below is the e-mail I received from XFX just the other day:
Regarding the OverVolt OC tool issue on 64-bit platform OS.
There is good news. ATI just released version 1.2 tool which works on 64-bit Vista and Win7. It is now available in our web for download.
So, if you've got a Black Edition HD 5970 from XFX and you're on a 64-bit version of Windows, it's time to get your overclock freak on.
You can download the updated tool from the XFX website here. You'll have to login to the XFX website first, though.