Hi, I've posted this in the ASUS forums but not getting anywhere so I thought I'd post it to a wider audience in case there was something incredibly basic I was overlooking. I've recently put a new system together from scratch with a P5K3 Deluxe WIFI motherboard (inc bundled 2x1Gb DDR3) and an ASUS EN8800GTX 768Mb graphics card using Vista Ultimate 32bit. On the surface, the system runs fine with no error messages etc but anything to do with 3D runs terribly. Tried the included Ghost Recon which ran worse than my old machine. Then ran 3DMark06 which gave a score of ~3000 on the standard settings and maxed out at 15FPS during the tests. Something is obviously wrong! Tried a few more games including recent DX10 demos which confirmed this. I have now tried/checked: - graphics card 'properly' recognised with correct memory and in PCIe x16 bus - connected with 2 x 6pin power - all latest bios/drivers - also rolled back through most old drivers but did not make a difference - fresh Vista install and carefully installing the ICH9R chipset program before any other drivers - flashed older bios versions to both graphics card (60.80.08.00.44) and motherboard (0501 & 0413) in various combinations but did not make a difference - tried different bios settings on motherboard (turning off SpeedStep, C1E support etc.) & checked PCIe slot is not forced to x1. - tried most settings available on the NVidia Control panel - loaded ASUS SMART DOCTOR which reports card is okay and confirms clocks are set as specified. Also indicates card runs at ~65°C idle. None of the above have made any difference, for better or worse. Reading through some other forums, these should have at least had some effect. Does this possibly indicate that there is a physical fault with either the motherboard or graphics card? Overall Spec: - Intel Q6600 Quad Core @ 2.4GHz G0 Stepping - Asus P5K3 Deluixe Wifi with bundled 2x1Gb DDR3 - Asus EN8800GTX 768Mb - 2 x 320Gb Samsung Spinpoint HDs in SATA RAID 0 (from Intel ICH9R) - Antec Quattro 850 W PSU - Antec P182 Case - Samsung SATA Optical Drive - Samsung 22" TFT via DVI - Vista Ultimate 32bit Your help would be much appeciated!!