I have question about mu computer.

[Quavadis]

Motherboard : ASUS P8P67 Series

Processor : Intel Core i7-2600K CPU @ 3.40GHz

Video Card : XFX HD7970

RAM : G.Skill Sniper Low Voltage series 16GB (4 x 4GB) 240-Pin DDR3

Harddisk : OCZ Agility 4 AGT4-25SAT3-256G 256GB Internal Solid State Drive - 2.5" Form Factor, SATA III, 6Gbps, TRIM, Ndurance 2.0 Technology

PSU : OCZ ModXStream Pro 600W Modular High Performance Power Supply compatible with Intel Sandybridge Core i3 i5 i7 and AMD Phenom

Windows 7 : 64-bit

System rating 7.3

Are they compatible with each other?
Sometimes my computer isn't working properly (slow and some black pixel on my screen)

I need your opinion guys.
thanks....

 

[hang-the-9]

Don't see any issues with what you have, they plug in OK? Boot up? Did the system work fine ever? If the pixels are random, move around, you could have an issue with the video card, too much heat, bad card, not enough power from the power supply. That system being slow is probably an issue with the Windows setup or you have viruses and/or spyware. Try a clean setup of Windows and all the drivers.