GT525M *vs* HD7610M + HD7640G

Sorry but a GT525M will do nothing better than integrated graphics on the CPU (ok maybe a tiny bit). You need to look for something better in the graphics department at least a GT555M. Sorry, at work and can't really research right now.
 
According to my researches, integrated graphics equals to GT510M so i thought GT525M would be better..

What about the first one i linked ? It's a 7610M with a 7640M in crossfire...

A GT550+ is definatly out of my budget

I'm just looking for something that could equal the performance of my HTPC (A8-3870K / Radeon HD 6550D)