Problems with computer build

[velocity7]

Hello,

I currently have the following setup:

Thermaltake VA8000BWS Case
Thermaltake ToughPower 750W
ASUS P5N32-E SLI
Core 2 Duo E6600
OCZ OCZ2G8001GK
MSI Geforce 8800 GTS

I've recently built this thing, and for some reason I'm coming across the following problems:
- tool-free clips are no good, cannot hold the video card or the included sound card securely
- the ATX rear plate is 0.5 cm too short of the mounting holes for the actual video/sound card; forcing a mount will end up causing a short (e.g., cards at an angle)
- system likes to freeze up or not POST at all (tried updating BIOS for this too). It'll even freeze in BIOS.

Any suggestions? Thanks.

 

[digital_exhaust]

- system likes to freeze up or not POST at all (tried updating BIOS for this too). It'll even freeze in BIOS.

Freezing in bios? Try clearing the cmos, and you might want to run memtest.

 

[velocity7]

Which way should I use to clear CMOS, pull out the RTC battery or use the jumper?

 

[digital_exhaust]

Jumper.

 

[engiNURD]

Which way should I use to clear CMOS, pull out the RTC battery or use the jumper?

both