Can I run DDR400@400 with CPU@333?

[FLD]

Hi all,

 

I was wondering if I can run my ram @ 400 MHz as the sticks are A-DATA DDR400 while I run my Barton 2500+ at 333 MHz?

 

I have not been able to do so as it would only allow me to run at most 1:1, which means I have to run my the FSB @ 200 in order to have the ram run at 400.

 

I tried running FSB at 166 at the frequency ratio 5:6 which means 200 MHz memory but it wouldn't even post.

 

I think my BOS is the latest official one.

 

Can anyone help me please?

 

Regards,

FLD.

[RGone]

...dealings with the NF2 chipset on any mother board, the 'word' has been that the NF2 chipset does not like to run anything but 1:1 ratios. Intels and one SIS chipset are the two situations that seem to run well with other than 1:1.

 

I have seen other than 1:1 run but the word is the performance hit due to 'increased' latency is not good. And sometimes a motherboard and memory combination will simply not run other than 1:1.

 

Am I right in assuming you bought Adata from NewEgg? The reason I ask is all Adata it appears is not equal. It appears that there is an entry level Adata and a more performance oriented version. Well it appears that way to me. Hehehehe.

 

Your best bet for success would appear to have the cpu get up to 200FSB as well as that being the rated speed of your memory. Most but not all 333/166 cpus will run the overclock of moving to the 200FSB level. You have to do some 'manual' setting though and not rely on "auto" settings.

 

Set chipset voltage to 1.7. Set Vcore to 1.75. Set Vmem to 2.9. Set Vagp to 1.6.

 

Set the cpu ratio to (11). Set FSB to 200. Set the memory ratio to 1:1. This should give you about 2200mhz and is a nice overclock that should be doable on a "mobile 2500+" processor.

 

You will have to set the Advanced Chipset Features/ memory timings to: Expert, Optimal, Expert and settign "down" the menu page 11, 4, 4, 3, Cas 2.5, 13, 15, and the rest on down that page should be OK but I make sure the one labeled 50% down near the bottom is disabled. I think it is cpu throttling.

 

This should allow the much looser timed Adata like NewEgg is selling to boot the cpu at 200FSB and the memory run at 200FSB for a mild overclock that should work for you. If you do not make the voltage changes then all bets are off as the cpu will have to have the added voltage to jump up to the same level as the FSB and then the 1:1 ratio can be used and you *should* be good to go.

 

I got these settings from a friend who tried the Adata before finding it not to his liking and returning it and buying some of the very last available CH-5 Buffalo from NewEgg that the memoryman told us was going to be there in a limited supply. He is a much happier individual by doing so, but you may be too late to avail yourself of that last batch of CH-5 that was availble in the UsA. Winbond who made the CH-5/BH-5 no longer manufactures memory modules for mainboard memory is my understanding.

 

Let us know how you get on. Sincerely, RGone...

[FLD]

Thanks so much, RGone, for being very deatailed and so helpful. I am in Melbourne, Australia so I couldn't buy from NewEgg. But perhaps I would in the future if I move to the US due a job offer.

 

I used to live in Wichita, KS, for a couple of years, though.

 

OC-wise, I am a newbie, so perhaps I'll try what you've recommended. I have been successful @190 or CPU and mem but the CPU temp was like high 40's.

 

By the way, I got a desktop CPU as the mobile version would be very hard to find. Or even if so, I would have thought of getting an XP 3200+ instead.

 

Also, what would you mean by the following?

 

["You will have to set the Advanced Chipset Features/ memory timings to: Expert, Optimal, Expert and settign "down" the menu page 11, 4, 4, 3, Cas 2.5, 13, 15, and the rest on down that page should be OK but I make sure the one labeled 50% down near the bottom is disabled. I think it is cpu throttling."]

 

Thanks again.

[RGone]

compromises or moves made to accomodate the situation is all that I can recommend. There are chipsets other than the NF2 which is on your board that do accomodate more latttitude of memory ratios but you did not buy one of those. Now it is up to you to fit the framework to the situation.

 

Get some more cooling if you must. 1:1 is just about a have to do. Passed that sir I have no additional clues. Hope your quest meets with success.

 

Sincerely, RGone...

[elts_drac]

I would try to talk to memoryman. Granted his experience is with Winbond, but I saw some posts that he made about using different ratios and was sucessful with it on the DFI's...he might be able to give you some insight.

[FLD]

Hi,

 

Sorry for late reply. I could do the FSB at 190 as well as the ram with the CPU core voltage at 1.7. And the temps were like in the low 40 C.

 

I am gonna try what you suggested. I t was really fun doing OC. Thanks.