Well, 3 weeks ago I decided to order a Sapphire X800 Pro VIVO after reader many articles that were saying the 4 extra pipelines can be activated. I received my X800 Pro VIVO a few days ago, installed it into my HTPC. First, I downloaded the latest Catalyst drivers from ATI site, the 4.12 version. Everything seems to works fine, until I try to adjust optimally the resolution for my HDTV, which had a bit of overscan at 1280x720. There is a function in the ATI panel that supposedly allow to create custom resolution so that you can create one optimally suited for your own HDTV. This function wasn't enabled in my ATI panel. After long time trying to figure things up, I decided to install latest Sapphire drivers from their site, which are tagged as Catalyst 4.9. Then the option to create custom resolution was finally active and I could easily create one perfectly suited for my HDTV. After spending some times enjoying HL2, Uru and some more on a big screen TV, and although the speed of the card was already quite above what I had experienced before with my 9800 Pro, I decided to go ahead and try to unlock the extra 4 pipelines. My first step was to install the VGA Silencer 4 on the X800, using Arctic Silver. It was a breeze to install, and it helped a lot to lower significantly the temperature. After 5 minutes of artifact scanning (using stock frequencies), ATI Tool reported 66°C with the original cooler, and 53°C with the VGA Silencer 4. My second step was to backup the original BIOS using ATI Tool. Then I downloaded a couple of BIOSes from here that I thought were well suited for my card (Sapphire X800 Pro VIVO). I created a boot CD with all the BIOSes on it (including the original), and the modified Flashrom from W1zzard. By the way, the BIOS that was in my card I couldn't locate in the list here. None of the BIOSes worked. Whatever the BIOS installed is, the resulting behavior is the same: the display become blank, and the computer freezes (I can say because Num Lock and such don't react). So I have to reboot using reset. Each time I installed a new BIOS, I took care to unsinstall the previous drivers, and I attempted to install Catalyst 4.12 from ATI site, or Catalyst 4.9 from Sapphire site. Here is a list of all the BIOSes I tried: Sapphire X800 XT 0707 Sapphire X800 XT 0812 ATI X800 Pro VIVO 16p ATI X800 XT PE 0609 Gigabyte X800 Pro VIVO 0507 Fortunately, flashing back the original BIOS always made my card work fine again. At this point, I'm assuming that the 4 extra pipelines are broken, and there is nothing I can do, unless I hear from someone out there that there is hope for my case. Anyway, it is still a great card to play with. Cheers, Ray.