DDR400 working@266-plz explain...

[dbal]

Why is it that my Kingston DDR400 module is running@266 (PC2100) mode?
It's working together with a northwood P4@2,2 on a Chaintech mobo with Intel 865PE chipset on it-and I am pretty sure that the 400FSB cpu is the reason for that, but can anyone explain this to me from an FSB/bandwidth/DRAM point of view??

Thanx in advance for any lessons

 

[jackschmittusa]

Is there a jumper on the mb that sets the FSB?

Is the bios setting for the ram speed set to "by SPD"?

 

[dbal]

No jumpers, the FSB can be overclocked through the bios and is at default, 100Mhz
Yes, I have left the setting to SPD

 

[xtknight]

It is running at a divider somewhere. Is there a "max DDR clock" (or similar) option anywhere?

BTW your sig link actually doesn't work : Add this (rig before id in the link address) so other members can view the rig profile: http://www.anandtech.com/mysystemrig.html?rigid=14391

 

[dbal]

Yep, lots of googling has drawn me to this conclusion-it's a matter of cpu/memory divider running. Problem is that this mobo allows only DDR266 setting for my 400FSB northwood (4:3 divider) with no other option for me to choose in the "memory frequency" tab in the bios...(auto setting makes no diff as you can understand)
Apparently if I use a 800FSB cpu (4x200 bus) I will get the rest of the supported memory options (DDR333, DDR400) and work the DIMM in DDR400, or am I going to be in front of other surprises as well?

P.S.: What to expect from a cheap replacement solution that lacks any kind of hardware monitoring (fans, temps, voltages) :Q Really, have you ever seen anything like that?
PS2: Fixed my sig-thanx for the notice, waiting for your hints again!

 

[xtknight]

Oh, well then your motherboard just doesn't support DDR400 mode for the DIMMs you're using. That can happen with some memory configurations (it just won't work above DDRxxx with chip X in config Y). Or, the motherboard doesn't support DDR400 for anything.

Saw this too: http://forums.legitreviews.com/about4591.html