I used the crucial pc scanner thing to check what ram would be best for my pc. Went on overclockers and found an alternative brand as i was also ordering a new case from there.. swapped everything to my new case and plugged in the ram but when i turn my pc on it won't boot up and resets before loading my desktop. Sometimes it has made it to my logon screen but no further.

I took the new ram out (2 x 1gig) and turned my pc on and it works fine.

There are only 2 free slots to put the new ram into and you can only put them in one way so if someone can tell me what im doing wrong or how i might fix this i'll be muchly thankful