Windows 7: Windows 7 keeps rebooting

Hi ppls,
Just put my new pc together and it keeps rebooting after the first stage of install. It comes up to "windows screen (the one with the prety colours) and then just reboots.

Tried ram, video card etc. Could it be that my system is sucking too much juce for the psu to handle (the psu is from my old machine)



OCZ DDR3 PC3-12800 Platinum 3x2GB OCZ3P1600LV6GK
Microsoft Windows 7 Professional 64bit OEM
Noctua NH-U12P SE2
Intel Core i7 930
Western Digital Caviar Black 1TB WD1002FAEX
CoolerMaster CM 690 II Advanced
Gigabyte ATI Radeon HD5870 2GB Eyefinity 6 Edition
Samsung SH-B123A 12X Blu-ray DVD Combo Drive
Gigabyte GA-X58A-UD3R Motherboard Rev2.0
G.Skill Phoenix Pro 60GB SSD
3 x Dell 2209W 22-inch Ultrasharp Monitor
Proluma Deluxe Triple LCD Monitor Stand
Zalman ZM600-RS

The SSD says that itis D drive and not C Drive