amd memory controller

[AsLan]

I think the memory conntroller has gone on my x2 550 - I don't actually know if this is possible.
Out of the four slots on my mb, A1 B1 A2 B2, i can only boot if memory is in A1 or A2 or both, This results in single channel operation.

Question is, is it a cpu or mb problem, I'm assuming cpu as the controller is on board, but any advice would be appreciated as I don't want to replace the cpu with an x4 955 if I am still going to have the same problem.

If I have to replace both I may be better waiting for Bulldozer to see what that does to prices.

Another question is how much noticable difference does dual as opposed to single channel ram actually make.

 

[Phatzy]

This points more to the motherboard.

 

[AsLan]

Does it?

I thought with the controller on the cpu the fault would be there.

Any suggestions on how to check? Can't really afford to buy both at the moment so I want to be sure.

 

[mmj_uk]

What speed is your memory? I know Phenom's have two seperate memory controllers so it might be that one has died.

 

[AsLan]

corsair dhx memeory 2x2GB running at 667MHz (1333 when in dual channel). Can't remember the exact part number.

 

[Frozennova]

It'll be mobo, if its memory controller you'll be getting memory related bsods and crashes rather than it not recognising the dimms

 

[AsLan]

Just swapped the cpus around with another system and the fault is the motherboard. Thanks for help