800 to 667

[the.ronin]

I dropped in a 4GB 800 kit to match an existing 4GB 800 kit I already had to bring up my RAM to 8GB. I do a lot of video editing which is why I need all the RAM I can get. But now on the BIOS POST screen, it reads "DDR2 667 Unganged Mode" where it used to read 800. Am I missing something here?

The existing RAM was a pair of A-Data 2GB DDR2 PC2-6400 and the new RAM is a pair of OCZ DDR2 PC2-6400.

For what it's worth, the motherboard is a Gigabyte GA-MA78GM-US2H and I'm running on an AMD Phenom 9950 2.4 GHz.

P.S. Disregard my outdated signature ... that's an old system.

 

[Mike Clements]

This is typical. The memory controller typically cannot manage 4 modules at the same frequencies at which it can manage 2 modules. So, the BIOS dropped the frequency to 667. You may or may not be able to clock it back up to DDR800. It will depend on your individual memory controller and also the capabilities of your board and BIOS. Socket 939 systems were notorious for this also.