New homebuilt... no signal to moniter too

HI
Basically, i have built my own system.. containing the following:

q6600 cpu
2 gig corsair dominator ram
xfx 8800gtx
ASUS P5K PRO iP35
and a 22 inch samsung moniter
Coolermaster 700w realpower modular psu

So, i have followed the motherboard manual carefully, plugged everything into the motherboard.. all components, all wires from my modular PSU but when i turn system on, nothing happens to my moniter, just sits there in standby mode without a signal - ie im not seeing a boot screen.
All fans are spinning, gcard fan spinning, cpu cooler, etc... the motherboard light is yellow... blue cathodes are blue (big surpise) and my cd drive is working fine - opens when i press open.
I dont know what to do, i have tried swapping rams into different slots, even only using 1 instead of the 2; i checked all the wiring to make sure its all in its right position, but just no signal going to the moniter.
The moniter does work as i used it on a different system the other day so im guessing its a graphics card problem.
Thanks for reading and i hope you can help

ok so clearing cmos for 10 mins means puting th jumper cap on for 10 mins... or clear it for the "reccommended 5-10 secs" and waiting 10 mins.. im not too sure what you meant by that
And should this actually give a signal to moniter so i can get to bios
thanks
Sorry for the double thread guys but my forum bugged and said it didnt make a post

bump

The issue might be as simple as incompatible RAM.
I spent weeks trying diagnose the same problem on my first build, even RMAed a mobo and a card, but they weren't the problem. Bought a diff. brand Ram and it booted up fine and dandy.
Just try putting in RAM that is known to be compatible to your mobo.