Im putting a new build together for a home server project I have bought the following 1x gigabyte MA790X-UD4 mobo athlon64 X2 5050e 1 x OCZ 2GB value DDR2 800Mhz Seasonic true power 400W PSU I already have an assortment of various SATAII drives and an old ATI passive cooled pci-x GPU I have assembled everything, double checked the connections and turned it on. All the fans, (case and cpu) spin up, no error beeps, but I can not get any output to the monitor, it stays in a sleep state, no mouse movements or key presses will wake it up. I kow the monitor 'sees' a GPU as if I disconnect the dvi connector from the GPU, the monitor displays a 'no signal detected' splash screen. plug the connector back into the GPU and the splash screen disappears, and the monitor goes blank again. At first I thought it might be the graphics card, so I took it out, put it into another machine, and I got output to the monitor straight away. I then tried to clear the cmos - no difference I tried the RAM in every slot - no difference. I took my working 8800GT and tried that in the new mobo, same result, no output to monitor. I tried both pci-x slots. I have disconnected everything but the cpu, gpu and RAM to try and eliminate errors.. One thing I did notice is that if i remove the RAM entirely and power on, I get no error beeps from the BIOS - shouldn't I get some sort of warning? Its a brand new mobo, so I doubt that it is faulty, how can I go about finding out what is wrong, Im stumped as I cant diagnose anything as I have no signal to the monitor. I am presuming that the RAM and CPU are OK as they are new, but I have nothing else to test them on. Please help as this is doing my head in, Im thinking of RMA'ing the board and trying to get another today, just thought I would check to see if i had missed anything?