Problems with new rig

[BoerRepublic]

i5 650
MSI GTX 470 twin frozer 2
GA-H55M-D2H motherboard
Huntkey HK700-52PP power supply

I just got a new case and moved everything over to find that no matter wat game I play it lags completely no matter if it's new or old. First I thought it was my primary hard drive as it's windows rating has dropped to 4.2 but then I noticed using resource monitor that my cpu reach's 100% on ever game, which is new. Wat have I dun wrong I've looked again and I don't see anything wrong

 

[saint19]

What RAM do you have? and that PSU is crap....

 

[BoerRepublic]

4g DDR3 don't know the make

 

[saint19]

We need know the manufacturer...

 

[BoerRepublic]

Transcend?? that's the only name on the ram

 

[BoerRepublic]

Ek het nie avg nie, en nee dit was warband, X3, Mass effect 2, DOA, lost planet 2, everything kills the cpu and lags like hell