Hi everyone, hope this is the right place to post this problem. I have built myself a PC and am having a problem with the whole PC lagging. By this I mean that the video/game is jumpy, sound skips and has a stretched out brrrr sound to it and the mouse is very jumpy when moving it around screen. This seems to mainly just happen when playing games or when watching a video either on the hard drive or youtube for example. Reinstalling the OS has not helped. I believe it is a hardware problem. If i had the money I would just switch them out till I found which part it was but I don't, so need to pin point the problem hardware. There is plenty of RAM and CPU Usage is not overloaded when it happens. Temperatures are fine. Could it be the Graphics Card? Any help would be much appreciated, here are my specs: Windows 7 64bit Ultimate ASUS P8P67 Pro Intel P67 Rev 3 Intel Core i5-2500k CPU @ 3.30GHz (Stock, not OC) Zaward Vapor120 CPU Cooler GeForce GTX 470 Super Overclock 8GB Patriot G2 Division 2 Edit RAM Coolermaster HAF 912 Plus Case Corsair 650W TX Series PSU - 120mm Fan, 80+% Efficiency, Single +12V Rail Samsung SH-S223L 22x DVD±RW DL & RAM with LightScribe SATA Optical Drive Tenda Wireless-N300 PCI Adapter Black 3.5" Bay Internal Card Reader with SIM and IR Please let me know if you have any advice, ideas or need any more information. Thank You.