My New Computer Specs ~ Need Some Help As Well -_- Again..

[rawfuls]

Well, my dad wanted me to pass my computer on to my mom, and gave me a new combo from Fry's...

Processor: AMD Athlon II X4 620 - 2.6GHz
Motherboard - Biostar A770E3
Videocard - Nvidia GeForce GTS 250
Memory - Corsair 4GB (2x2GB) 1333Mhz

Now heres the question, the memory says i5 & i7, and since it has been freezing me out, and BSODing me, I'm wondering if it really is the memory specs, or if it's just defective sticks.

Processor: http://www.newegg.com/Product/Produc...-706-_-Product

Can't find the motherboard anywhere

Videocard: http://www.newegg.com/Product/Produc...ch%20gts%20250

Memory: http://www.newegg.com/Product/Produc...-278-_-Product

Now you may be asking why I bought $110 memory, it's because it was on a rebate sale, $110 - $40 MIR = about 70 bucks...

Help!

I'm waiting until they get more stock to go exchange it, but we're talking about the 29th of January...