My PC locks up when I Over Clock. Is it the Mother Board, the PSU or V

My PC locks up when I Over Clock. Is it the Mother Board, the PSU or Vista? Every power Supply calculator I can find I should be able to use less than 700 watts so I bought the Antec True 750. Could this cause it? How can I get my memory to run at it's native 1600? Memory runs fine at 1333.





COOLER MASTER Storm Sniper SGC-6000-KXN1-GP Black Steel, ABS Plastic, Mesh bezel ATX Mid Tower Computer Case

Antec TruePower New TP-750 Blue 750W Continuous Power ATX12V V2.3 / EPS12V V2.91 SLI Certified CrossFire Ready 80 PLUS BRONZE Certified Active PFC "compatible with Core i7" Power Supply

Intel Core i7-975 Extreme Edition Bloomfield 3.33GHz 4 x 256KB L2 Cache 8MB L3 Cache LGA 1366 130W Quad-Core Processor

COOLER MASTER Intel Core i7 compatible V8 RR-UV8-XBU1-GP 120mm Rifle CPU Cooler

ASUS Rampage II Extreme LGA 1366 Intel X58 ATX Intel Motherboard

CORSAIR DOMINATOR 12GB (6 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model TR3X6G1600C8D

HIS H587F1GDG Radeon HD 5870 ( Cypress XT) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card w/ATI Eyefinity

NZXT SEN-001LX Sentry LX Aluminum dual bay fan controller

LG Black 8X BD-ROM 16X DVD-ROM 40X CD-ROM SATA Internal Combo LG Blu-ray Reader & 16X LightScribe DVD±R DVD Burner

Western Digital VelociRaptor WD3000HLFS 300GB 10000 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive

SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive
Ultra ULT40366 3.5" Floppy Drive with Multi Card Reader