DFI NF4 Ultra-D downgrading ram speed??

[espeed]

I have a mate who seems to think that the DFI ultra-D board will downgrade 400Mhz ram to 333Mhz if more than 2 sticks are used?! The specs for the board clearly say up to to 4gb allowed with 4 slots. I have never read of this odd occurance as I am planning to upgrade to this board. Anyone heard of this?

Im pretty sure its baloney.......

 

[ChrisX]

I have that board and from the stuff I looked up and found out about it I found no mention of it. Not only that but I don't see how or why a mobo would do that.

EDIT: only 2X1GB btw.

 

[espeed]

ok it appears i misunderstood my friend. He is using the DFI board with an AMD 64 3500+ venice core and apparently the memory controller on the CPU will run at 333mhz if all 4 banks are used on the mainboard with 400mhz ram.

Can anyone shed light on this??

 

[espeed]

ok, so the mainboard has nothing to do with it. Ive read that apparently with amd 64 chips using E core technology, they dont handle 4 dimms to well, and the performance drops compared to using just 2 dimms. heres a link to explain it all http://www.xbitlabs.com/articles/cpu/display/athlon64-e3-mem_2.html

What i wanna know is, do the X2 chips use a revised version of E core to possibly get past this problem. i dont wanna use 2 x 1gb dimms, yuck! Gimme 4x 512mb any day....

 

[espeed]

ok, it appears the X2 processors are using a more advanced memory controller which allow for up to 4 dimm slots used in 400 mode.

heres the article http://www.xbitlabs.com/articles/cpu/display/athlon64-x2_2.html