I have always used NVFlash to flash my NVidia BIOS's but I notice the last update was February 2008 which is before this card came out. I tried using my current version and it complains that there is no NVidia device present. What are you guys using for flashing your GTX 260 BIOS? BTW the only change I was wanting to make as a start was to up the voltage (see attachment). I assume this works OK? My temps seem fine at stock so I think I have some headroom at higher volts.