new build not booting

here are my system specs

Hiper 580W power supply
2GB Corsair XMS2 667
Maxtor 250GB
Intel E4500
XFX Geforce 7900GT
Gigabyte GA-P31-DS3L

the processor and the mobo are new, all other components from my old system.

i built the system today, and when i pressed the start button the cpu fan sort of kicked and span a little and then stopped, the graphics card fan and the psu are working but there is no display on the screen, there dont seem to be any error codes either

i have tried different ram configs etc, at a bit of a loss here

Try reseating all the components - i.e. the expansion cards, but particularly the memory. I had this problem recently on a new build. It turned out that one of the memory sticks wasn't seated correctly.

thanks guys but i have tried reseating everything and even dug out an old power supply and tried that but still no signal on my monitor

could this be a bios problem perhaps?

i should mention that the hardrive has the installation of windows from my last system, could this affect the system in some way?

ok ive tried all the ram combinations, no luck

looking at the gigabyte website it looks like my modules arent on their supported list, could this be it?

i did yeah

since everything is powering up but im gettin nothing to my monitor is it very likely to be a ram issue?

Do you have the 4 pin cpu power plugged in as well as the 20/24 pin.

One other thing I can think to try is to take out your mobo from the case and make sure its not shorting in the case.

Assemble it on a phonebook or some thing and see what happens.

Also when you try this. Take everything off the mobo including the cpu. After you got a bare mobo reset the cmos on only the mobo nothing else pluggged in. Assemble on phonebook and see if it powers up.

Did you use the brass standoffs to mount the mobo, and the paper washers?

Which case do you got I want to look it up. Which ones dont have support? This might be your problem. Either this or ram incompatibility.

Is the motherboard grounding anywhere?

Did you assemble outside the case?

ok so im going to buy some of this stuff

http://www.overclockers.co.uk/show [...] -GL&tool=3

v cheap and its on the gigabyte list so no excuses now.....

Try with just 1 stick ram, video, cpu, and short it to get it going. If that dont work go get a 1g or 512 meg stick of ram from the QVL and try that. If ram from the QVL dont work, then try a different pci-e card.