Hello people, I'm from Argentina, I've recently bought a sapphire hd 4770 arctic cooling (the one with blue pcb, http://www.arctic-cooling.com/catalog/product_info.php?cPath=41_45&mID=343) but I've been having problems with overclocking, I can reach stables 930 on gpu but on memory I only can reach completely stables 863mhz, if I go above that, lets say 864mhz (just 1 more mhz on mem) then I have a black screen and I must shut down the PC. The temps at full stress and 930 gpu - 863 mem are 62C and 73C and without touching the fan speed. The bios version is VER011.022.003.006.032575 dated 07/15/09. I let you a screen of gpu-z. Lot of people is having the same problem, this version was released a month ago. I have tried all catalyst´s versions, from 9.4 to 9.9, and the 9.7 included with the card, also I´ve tried every possible program to overclock the card. I read somewhere that may be there is a BIOS BUG. Something about reading clocks. Because card from PowerColor PCS 4770 have the same problems, but for that card they found a solution but on this card it does not work. Anyway I think we need new BIOs for this card. And this card(BLUE PCB) have a different vgpu controler, so BIOSes from previous version, or from ASUS TOP card will not work (or will them?, I really dont think so...) Name of the vgpu controler is uP6201BQ, memory controler is the same and even volt mod do not work for OC memory over 863Mhz. So, it may be a BUGGED BIOS. Here is the link of PCS 4770 with OC problem, but they solved, not worked for my card. http://www.techpowerup.com/reviews/Powercolor/HD_4770_PCS/33.html I hope you can help me, I think my card can do better than this. Thank you!!