Hi guys, I am running 2 cards in crossfire. 1 Sapphire HD5830 and one HIS HD5830. I was looking to change the VBIOS fan settings because the HIS always appeared hotter in CCC/GPU-Z than the Sapphire. When gaming, it's about 10°-20°C difference. When I compared the too fan performances, I found that the Sapphire is more reactive towards temperature than the HIS. The HIS is only speeding up very slowly. So I decided to download RBE and check the BIOSes. I found that both BIOSes have really good settings and both have exactly the same fan settings (temp. tresholds etc.). After that, I was confused because Catalyst doesn't tell me that at all. It always gives different fan % for similar temperatures. And in the long run, the HIS is always hotter (slave) and has less fan % load. That was the reason why I thought a BIOS tweak would be considerable before knowing that the settings in BIOS are the same. Then I downloaded the new Furmark app. for multi GPU. Fur mark gives me same temperatures on both GPUs, being compatible with what the BIOS says (same fan settings). So: could it be that CCC reads the temps and fan rpm % awfully bad for my second card (HIS)? could it be that the 2 BIOS, being different versions, give different values to CCC? Should I flash 1 of the BIOSes? Changing the BIOS settings now seems pointless as they, theoretically, are set up in the same way. So I left everything at default. I do not want to OC my cards, just want to get the temps on my HIS down. If Furmark is right, then they are already similar. If CCC is right, there must be some kind of misreading going on, because same BIOS settings+different temp.+fan% values = not coherent. To illustrate, some pics are attached. Note: upper curve in Furmark is the Sapphire. For GPU-Z/CCC, the Sapphire is linkted to my monitor [HP w2207]. (look at fan speeds vs. temperature in CCC, normally gap in temp is bigger and gap but gap in fan speed is illustrative). I also attached a bios screenshot to show the difference between BIOS settings and reality. Thank you in advance, Marc.