Cross-posted over at Sapphire's Troubleshooting forum. I'm mainly checking the validity of GPU-Z's readings of the card. I just recently finished my yearly "Tax Return" PC upgrades. The HD 3780 X2 card being one of the major points. Overall specs, I know they help.. AMD Athlon X2 6400+ Gigabyte GA-MA790FX-DS5 2x2GB Kingston HyperX DDR2 800MHz 2x74GB WD Raptors Striped, 1x320GB WD Cav Storage Drive SAPPHIRE 100221SR Radeon HD 3870 X2 1GB Enermax Liberty ELT620AWT 620W Vista Home Premium x64 VARIOUS ATI RECOMMENDED VISTA HOTFIXES APPLIED! ..And the rest is invalid. I'll throw my own findings into this thread, because I'm also not convinced that I'm getting what I paid for with this card. I'll also be linking to Rivatuner 2.06 as well as a modified .CFG file for that software that'll allow you to unlock the HD 3870 X2's fan speed, as that seems to be another major issue with the card in addition to the clock speed problem described. First off, without messing around with Rivatuner, the follow screens depict what GPU-Z finds about the card, running straight off of a fresh Vista x64 reboot. GPU-Z does find the two GPU's, and shows them as two independant cards. Both cards are running at about half stock speed by default. This being the first GPU in the dropdown box: ..And the second GPU in the dropdown box. this one is a bit strange as it lists the default clocks correctly, while the other one doesn't: A shot of the first GPU's sensor tab. Temp is idle at 58°c, with the fan speed at "35%": Second GPU's sensor tab. Temp @63°c, and fan speed @"12%": Lastly, GPU-Z detects Crossfire as being disabled. Awesome. Now I'm stuck wondering how much more performance I'd be getting out of the machine if the card was running as advertised. Part of me is also hoping that the GPU-Z readings are wrong, but I somehow doubt that. Alright, with that out of the way, everyone who owns this card needs to go download Rivatuner 2.06 and this custom .CFG that unlocks the fan speed modifier for the HD 3870 X2. Just follow yantronic's directions in the post. I'd recommend setting the fan speed to 50-100% within Rivatuner while playing games, just to be on the safe side, until AMD/ATI/Sapphire gets this worked out.