Windows 7 X64 Freezing During Games Or Firefox Usage

This is the 2nd time trying to type this, my system froze mid-post . Writing this in safe mode with networking. I have been having daily freezing with my PC for 1 week, today is the first time it has froze 3 times in one morning. When I say Freeze, I mean not input from the mouse or the keyboard is accepted. The mouse cursor stays seen on the screen and I see no screen movement in games. The only way to proceed is to hold down the power button to restart. Today is abnormal in that the pc/os has frozen 3 times already. Normally it doesn't freeze during the first hour of uptime. It may freeze during games like WoW or Just Cause 2, or during only Firefox usage with no other applications running. The PC is one week old (purchased on Sat) and is a self built Sandy Bridge system.

Software:
Windows 7 Pro 64b, Office 2010 32b, Steam, 7Zip, Driveimage, Microsoft security essentials, CCleaner. I believe office, steam, and CCleaner were installed after the first crash. Nvidia drivers for GPU. Gigabyte drivers for MB (though most of the MB apps have not been installed or have been uninstalled), LAN, Audio, SATA.

Hardware:
i7 2600k, Gigabyte P67A-UD4 (I moved the SATA connection to a non-intel port due to Intel announcement), G Skill F3-12800CL9-4GBRL (2x4GB), Samsung SATA F3 1TB HD, Gigabyte 460 GTX GPU, Zalman CNPS 9900MAX CPU cooler. Nothing is OC except Video card and that was by the manufacturer.

I check all temps using Hardware Monitor, Nvidia's GPU utility, Core Temp, CPU-Z and GPU-Z. The highest temp in the system is the GPU at ~ 64C under full load. Full load is done with Folding at home, the SMP client for the CPU and the GPU client. Dumps have NOT been gathered, though they HAVE been enabled by trying the standard dump and the small dump. I even changed the default dump folder to C:minidump. I assume because the system freezes the dump is not gathered as the system doesn't know about the freeze only that it wasn't shutdown properly. I have checked the event logs and again, nothing seems to be noted though I admit I do not have expert skills with event logging.