Hello guys,
I have bought a new PC recently, but it keeps freezing occasionally. I am no pro with computers but the way it freezes seems like a Video Card or RAM problem. Strangely enough there is no problem with the PC when I stick an external video card and the freeze happens only when I use the internal HD 3000 on my PC.

The configuration is as follows :
Motherboard : GB GA-Z68M s.1155
Processor : Intel I5-2500K 3.3GHz BOX 1155
RAM: RAM KIT 2x4GB1600 A-DATA
HDD: 1TB WD SATA III 64 MB GREEN
Power Supply : FORTRON FPS 700 - 700 WATT
Any Ideas ... what could be wrong - is it a faulty memory block or perhaps the built-in video ?
Thanks in advance