Vista x64 Boot Up Problem

Hi, I just bought a new custom made computer, and I have been using it for about 3-2 days since i got it. Worked fine until today, i tried to boot it up and it shows the POST screen and will freeze there and won't go any further. Sometimes when i restart, it will say "Checking NVRAM" and will freeze again. I have tried the following, Reset CMOS, Reformatted with xp cd, and used a different hard drive. Thanks in advance.

Here are my computer specs.
Manufacturer:MICRO-STAR INTERNATIONAL CO.,LTD
Processor:Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (4 CPUs)
Memory:8190MB RAM (4x2gb G-Skill sticks)
Hard Drive:500gb (Seagate Barracuda)
Video Card: NVIDIA GeForce GTX 260
Sound Card:Creative SB X-Fi
Operating System:Windows Vista™ Ultimate x64 Service pack 1
Motherboard:MSI MS-7514 Mainboard

NVRAM is an acronym for Non-Volatile Random Access Memory. NVRAM is a type of Random Access Memory (RAM) that retains its information when power is turned off. The NVRAM is a small 24 pin DIP (Dual Inline Package) integrated circuit chip and is thus able to obtain the power needed to keep it running from the CMOS battery installed in your motherboard. It keeps track of various system parameters such as serial number, Ethernet MAC (Media Access Control) address, HOSTID, date of manufacture, etc. NVRAM is therefore a type of non-volatile memory that offers random access.

I would check the CMOS battery, And if need be replace it. You may need to reinstall drivers (i.e., video), and I would check all cables/connections. You may want to replace the MoBo as the 24 pin DIP integrated circuit may be damaged/non-functional if it is not the CMOS or loose connections.

You can also run a memory diagnostic:
run it from the Vista O/S Disk in Advanced recovery:http://www.vistax64.com/tutorials/194765-system-recovery-options.html