no signal on monitor??????

[mnsnota]

Running xfx1950 gx2 and viewsonic vx922, the dvi cable is the only one that will work but when i power on it shows no signal? any help please?

 

[cutfast69]

it's 2 gb of corsair twin2x2048-6400c4pro
asus p5n32-sli se deluxe nf4sli
xfx 7950gx2
psu is pc power and cooling 610 watt
core 2 duo e6600
x-fi platinum soundcard
74gb raptor hdd
250gb hdd
not sure if i missed ne thing. im his friend... was helping put it together... everything as far as i could tell was hooked up right... although the one thing that wasnt.. was the system speaker. the one built in... couldnt find it ne where.. the wire for it i mean... it was literally no where to be seen. other then that everything was hooked up. we got it to run the bios once but it froze up as i was setting it up. but other then that it doesnt show ne thing outside of no signal for about 15-30 seconds. and then nothing.

 

[cutfast69]

ne help?

 

[mnsnota]

MOBO: Asus p5n32-sli se deluxe

CPU: E6600

Ram: Corsair xms2 ddr 800

GPU: XFX 7950 GX2

PSU: PC P&C 610 watt

Monitor: Viewsonic vx922 19" 2ms

SC: X-fi Platinum

HD1: WD Raptor 74gbs

HD2: WD Caviar 250gbs

Optical: Samsung 48x dvd/rw

Floppy: Samsung

I havn't even installed the OS yet, the monitor reads "no signal" on boot. I booted it about three times and it has reached the beginning of the bios ****, but then sputters and freezes. Then about twenty more boots I get nothing but "no signal" on monitor.
Does this Mobo support ddr-800, my buddy read the manual it said it's highest 667mhz and 533mhz. The monitor has dvi and vga connections but, the GPU only has dvi connections?