MotherBoards are confusing, need help

Hardware Hub Motherboards
1

This is the question that I have; What is the difference between these 2 motherboards? 

Asus M5A97 R2.0 ATX AMD Motherboard: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131873

Asus M5A99X EVO ATX AMD Motherboard: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131754

I notice that the 99X has a newer northbridge, but is it worth the extra $35? (I'm kind of on a budget)

They both support my CPU as well, which is an AMD FX 8320 8 core 3.5GHz.

 

Thanks for the help!

2

Ok the big difference I've found on 990x and 970 is the pci bus speeds

990x gets you more total bandwidth for you pci 2.0 slots.  The 990x gives you a 16x for single and 8x for dual cards.

The 970 gives you 16x for single but only 4x for dual cards.  At least thats all I've seen from it.