Originally posted by OOZ662
All of the 6800s (as far as I know) are manually unlockable using a program called RivaTuner. nVidia made all the different versions of the card by locking or unlocking pixel pipelines/shaders to slow the card down. All of them have the same hardware, so there's really no downside to unlocking them.
I've used a standard XFX 6800 unlocked to whatever the best 6800's specs are for the past three or four years. With a decent system under it, it can easily run this game full slider settings and hi-res.
That is absolutely incorrect. The ONLY unlockable 6800 series card is the 6800GS AGP version. And even then, not all will be fully unlocked. For some, both pixel pipelines and vertex shaders may work, on others only one or the other will work. On some, none will work.
The 6800GS AGP versions use the NV40 architecture, which is the same used in the 6800GT, but there was defect with some of the NV40 chips they made. So, they put them in the 6800GS AGP. However, a majority of the chips were still good which means you can unlock some extra pixel pipelines and vertex shaders to make it perform the same as a 6800GT. And, to go further, you can even change the bios of the 6800GS to turn it into a 6800 UltraExtreme, which is pretty close to a 7800GS. Regardless of what anyone tells you, opening up the extra pixelpipelines and vertexshaders WILL NOT damage the card. If it doesn't work, you can set it back to factory spec. However, upgraded the bios to run it as an ultra extreme can ruin the card, since the bios mod will make the card run faster, which produces more heat. If one did the bios mod, I would recommend installing a better fan and larger heatsink.
In my experience ALL of the BGF brand versions of these cards were unlockable.
A nice performance boost for nothing. And it's completely safe for the card, unlike overclocking.