Rebuilding PC

[Skulhead = hacked.]

I am going to rebuild my computer and going to replace these things:
Video: ATI Radeon HD 4300/4500 Series
Physical memory: 4096 MB 4x 1024 DDR2
CPU: AMD Athlon(tm) 7750 Dual-Core Processor 2700 MHZ

to:

Kingston DDR3,1066-2G
XFX Radeon HD6870 BLACK EDITION, 1Gb
Intel Core i5-3570

And a new vent thing with 700 W, not sure how you call it in english.

My mobo: MS 7501, do I need a other one?

But I need to know how to check if I can put these parts in my computer, can somebody help me with this?

[yugurt]

yes you need to switch mobo also if you switch mobo get some ddr3 ram