Posted August 23, 201311 yr Hey guys, I recently got me some HD 7970's from XFX. Last night I tried to overclock with them and noticed that everytime I raise the clocks, the system hangs as soon as it starts a benchmark, so I decided today to pick one card out and see what it's capable of. Here's what I figured out: Stock clocks are 925/1375, I just flashed a custom bios with 1050/1500 clocks(not GHz bios). At these clocks it still runs fine, but when I up the core to 1060MHz for example I already got enormous artifacts, even though it's only 10MHz more. I modded the bios again with 1075/1500 clocks and it ran fine... What is going on here? Why can't I set a normal overclock without it crashing or artifacting and when I flash the clocks there's no problem? Edited August 23, 201311 yr by rsnubje
August 23, 201311 yr You have not mentioned which software you are using to raise the clocks? The problem might be software and not the card
August 23, 201311 yr Author I tried Trixx, GPU Tweak and the latest afterburner. I use Catalyst 13.8 Beta. Edited August 23, 201311 yr by rsnubje
August 23, 201311 yr Hmm interesting, my mate had a similar problem with a 7970 Power edition. Glad to see he's not the only one with this problem.
August 23, 201311 yr Author My solution for now, even though it's not the best, is to use this tool to at least be able to run a decent overclock. Got my card running 1100/1700. Not much more is in it because it doesn't have voltage control. When you use it, don't forget to use this command: atiflash -f -p 0 bios.rom. If you don't use -f the flash will not work because it doesn't have a checksum.
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