Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
What cars are you using? Is it a reference card
Reference m8, HIS HD7950 3GB FAN (H795F3G2M). I can max the volts on it fine with AB, just not with trixx
As its on topic, my Gpu has samsung VRAM how well does that overclock compared to elpida/Hynix?