Well, I bought a GeCube X800 Pro VIVO with the entire purpose of ramping it up to XT PE. I bought a Thermaltake Giant 3 for my old videocard, so I was pretty sure it would run at XT speeds. After the flash, everything went fine. 16p, around 40% speed boost. But it soon started artifacting. Most noticible in ATITool, it was kind like a grid of flashing white pixels. But all my games were handling it fine, only being able to see them when you look really really hard. But Vampire: Bloodlines hated it. It looked terrible, lagged like crazy, and then crashed. Reverting back to my Original BIOS it all went fine. I tried a number of XT PE BIOS's (3 Stock ATI ones, 2 GeCube ones, and a Gigabyte one) to no avail. I also tried the ATi Pro VIVO 16p one, but it still rooted up. I figured that I had dodgy pipes, and was fucked. But maybe not. For no good real reason, I tried other X800 Pro VIVO 12p Bios's (An ATi one and a Gigabyte one) and got the exact same problems as with the 16p ones, except ATItool only found 12p, so I started thinking what the problem was, and figured that it had to be a problem with the chip, or something...
And how do i tell if its 1.6ns ram? All the online specs I found just say GDDR3, nothing about the ns specs. Dont tell me I have to rip off the stupidly large hsf again, the shitloads of thermal paste just go everywhere.
So, any thoughts oh masters of the uber ATi hack-y ness?