Small question about my old CPU

[Doctoral]

I had an AMD Athlon 64 X2 5000+ 2.6 GHz cpu until I installed my new Athlon X4 975 3.6, and I'm wondering why was the old one so slow? For games, that's understandable. But it was horrible, the computer would freeze up.. windows would go "Not responding" and all that mess.

Was it because it was old? Or what..

 

[panais]

Hi.

Old? No.Not exactly,a problematic\dying cpu probably.

Windows 7 can run with just 1 gigahertz (GHz) processor.

You can always check\stress the cpu using http://www.sevenforums.com/tutorials/100352-hardware-stress-test-prime95.html

But as you said you already removed the specific processor.