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Using 667 and 800 ram together

Last response: in Motherboards
April 21, 2009 11:24:29 AM

Hello :) 

I have a DFI NF ULTRAII-M2 currently with 2 x 1gig DDR2 667. I put in a 2gig DDR 800 next to it, but my windows only shows 2gig ram still.

How can I get this to work? or because it my MB doesn't support 800, will the 800 ram I put in not run at 667?


More about : 667 800 ram

a b V Motherboard
May 1, 2009 7:49:04 AM


667 and 800 ram have different CAS Latency's. It would probably be wise to run one or the other but not a mix.
a b V Motherboard
March 27, 2010 6:35:18 PM

When you upgrade the memory in dual mode make sure both are in equal speeds otherwise some mother boards wont detect both..