I bought and built a new computer parts with the following configurations-
Crucial 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1066
BFG Tech BFGEGTX260896OCE GeForce GTX 260
Intel Core 2 Quad Q8300 Yorkfield 2.5GHz
Antec Basiq BP500U 500W PSU
and Gigabye GA-EP43-UD3L
The computer is working great for the past few months but these days when I came up to my machine then find that it continually restarting. Now when I switched it on, it will post and sometimes boot up the windows. After less than 5 minutes it will automatically restart and continually booting without posting. (the fans will stop, the "phase leds" will turn off, then everything turns back on and the process again applied ). I have played with unplugging memory and replugging it. I have clean the dusts on the system. I have also reset the BIOS and pulled out the CPU and videocard just to see if reinserting hardware would resolve it.