Not accepting new ram

[Mazoku]

Hi, i have an asus a7n8x-x motherboard bios version updated to 1010 with a sempron 3300 processor, i had in it a 512 mb pc2700 ram stick. I wanted to upgrade my ram and i know that my motherboard can support pc3200. I bought 2 1 gig pc3200 sticks but when i try to use them my pc keeps freezing during the post right after the testing memory phase. this happens no matter how i set my bios. I bought both sticks off ebay but am unable to verify the brand as there is no specific markings or labels that would say. Is it possible i was sold bad ram? or is there some sort of compatibility problem with my system? or maybe im just doing something wrong altogether.. any suggestions?

 

[Tmagic650]

Asus motherboards are very picky about RAM. Go back to the original ram and compare specs with the new RAM. The A7N8X-X is getting a bit old now... I can imagine that PC2700 is about the best you can do