Greetings all. Recently I bought a Sapphire Radeon HD 6950 2GB Dirt 3 Edition (100312-3SR). It seems that most people haven't had any luck unlocking the shaders on this card. However I've had some success and wanted to share. This isn't a complete guide, just the steps I took: Part 1: Set the bios switch to the position that is furthest away from the crossfire connector. Backed up the card's bios with RBE, and named it: unmodified-bios_1.rom Copied the backup to the atiwinflash folder, and named it: modified-bios_shaders_1.rom Loaded modified-bios-shaders_1.rom into RBE In RBE, selected: Additional features Under Unlock 6950 -> 6970, selected: 6970 shader count Saved the bios, in the atiwinflash directory, as: modified-bios-shaders_2.rom Part 2: When I tried to flash the bios with RBE, it errored out: "Unknown! Invalid BIOS or adapter selected. If this error persists, try using WinFlash itself." I read that having UAC set to its lowest setting might be needed, so I did that. Whether or not it made a difference, I don't know, as I moved to the next steps right after this one. Tried flashing the bios with atiwinflash (via the gui), but received the error: "Cannot Erase ROM" Therefore I chose to open a Command Prompt (be sure to run it as administrator). Navigated to the atiwinflash folder. Entered (where 0 is the number of your adapter): atiwinflash -unlockrom 0 Entered: atiwinflash -f -p 0 modified-bios-shaders_2.rom The flash completed successfully and I think I was prompted to shutdown/reboot. Part 3: Shut the computer down for 30 seconds to a minute and flipped the PSU power switch off. Booted the computer up, ran GPU-Z to check the shader count, which displayed: 1536 Unified Used Sapphire Trixx to modify the "Core Clock" and "Memory Clock" settings, to 880 and 1375, respectively. Re-enabled UAC to its default setting. 3 Cheers for success! I haven't played too much with the GPU voltage setting, nor other methods of ramping up the core and memory clocks, but I dig the progress made so far. Something else worth noting, is that I bought this card on 2011-08-08 (Y/M/D), therefore it seems like there's a good chance you can get a card without the shaders being physically disabled. Hope this helps others. Cheers.