just built the following system... GAINWARD 8800ULTRA 768MB 8576 ABIT IN9 32X-MAX s775 nF680i Corsair TwinX 2GB DDR2 6400 C4 Intel Q6600 Quadcore CPU XCLIO WINDTUNNEL BLK CASE NPSU 500Gb Seagate SATA2 LiteOn LH-20A1S-15C SATA BLACK CLabs SBS 560 5.1 Speakers MS Win Vista Home Prem 32Bit CORSAIR HX 620W MODULAR PSU when I first turned it on the screen did not receive a signal. After poking about on the net on my old pc I found that reseting the bios could work. So I flicked the EZ-CMOS1 up and down and low and behold It worked. The only this is I have to do this every single time I restart the PC? It also complains about the CMOS checksum error or something. This is my first build so any sugestion will help OK I just noticed something in the start up... when It complains about the Checksum thingy it says the memory speed is 533MHz, the Ram (this) I bought is ment to run at 800MHz, could this be the source of the problem?