DDR400 running at 333mhz!

[Dr Asik]

Since I added a second 512MB stick of ddr400 ram on my Asus P4S800 motherboard, my ram is running at 333mhz instead of 400mhz. This is pretty bad considering my processor's FSB is 800mhz.

I tried to edit that in the bios but forcing 400mhz prevented the system from even POSTing. I was lucky I could get into the bios and reverted the setting back to "Auto", which it considers is 333mhz.

Is there any other way I can get that ram running at it's full speed?

 

[ricckko]

Asuks and others have really poor ddr400 support. Recheck the latest available full specs not the short bytes shtuff. See if there is a f/w or bios update - could be the type of ram or the bank number being used. e.g. 1 & 3.

One thing you can be guaranteed is that the pictures will not match with the actual product will not match with the description.

Having contacted asuks after no 4GB support at 400MHz, although their advertisments and short literature says contrary, their arrogant A response was "we would have told you if you asked"!

 

[glassvial]

Not a big fan of Asus myself, they are quite arrogant! But sometimes you have no choice.

 

[Peter]

Is this a single-channel board? If so, then that speed stepdown is by specification. DDR400 is defined for one DIMM per channel. With two, the safe and guaranteed speed is DDR333.

If you want to venture into YMMV territory, you can try putting it back to DDR400 speed manually.

 

[Steve]

Your processor's FSB is not 800 MHz.

 

[BassBomb]

Originally posted by: sm8000
Your processor's FSB is not 800 MHz.

he never stated what cpu he has so how would you know?

it could also be that his other ram stick is at 333mhz? so they have to be working same speed

 

[Steve]

Can you show me any CPU that is really running its FSB at 800MHz?

Your second point is a valid question, however that DIMM's speed can be determined by running it alone. If it is indeed DDR400, then Peter's point stands.