Does XP 2400-M hate high FSB?

[linksep]

I have a IQYHA XP 2400-M (didn't write down the week). It seems to hate high FSB. I can't even boot windows at 210*10 1.775v (or 200*10.5 1.775v) yet I am running 175*12.5 1.6v as I type this (38*c 100% load).

I ran Memtest x86+ for 8 passes stable @ 210fsb (aborted test cuz it was almost 4 hous in with 0 errors).

System Specs:
A7N8X-Dlx Rev 2.00
IQYHA XP 2400-M
1GB Corsair XMS PC2700 @2.8v 11-3-3-2.5
Tt "Pipe 101" HS with 80mm Panaflow

I am limited to 12.5 multi and had to run over 1.9v to get a lousy 2.3Ghz (temps were ~47*c or 10*c higher for another lousy 100Mhz). Am I wrong? I keep hearing all these crazy 2.5-2.7Ghz speeds at 1.85v and I think I remember seeing some 2.4-2.5Ghz speeds at 1.65v.

Any one else have this problem or have some ideas for me?

 

[OC Detective]

Its your Ram thats the problem as it is only rated to 166FSB! Nothing wrong with the cpu. That Asus mobo as well is also a limiting factor for FSB.

 

[Albis521]

my 2400 mobile has been stable at 215x11 at 1.675 VCore

 

[linksep]

Its your Ram thats the problem as it is only rated to 166FSB! Nothing wrong with the cpu. That Asus mobo as well is also a limiting factor for FSB.

I ran Memtest x86+ for 8 passes stable @ 210fsb (aborted test cuz it was almost 4 hous in with 0 errors).

I can run 210x9 just fine it's not my ram, it's my proc.

 

[OC Detective]

Its not your processor that is the problem at high FSB as the upper limit is way beyond 210FSB for the cpu. If you are talking about the overall frequency i.e FSB x multi then that is entirely different and probably related to other issues such as psu.

 

[linksep]

I can run 2.19Ghz at 175*12.5 with 1.6v Core, but I can not run 205*10.5 (slower at 2.15Ghz) with anything less than 1.875v Core.

If my memory (Corsair XMS PC2700 LL pro super ultra overclockers memoy GARUNTEED to hit 180Mhz cuz I bought it when there was no such thing as PC3000 or higher) or my mobo is the problem why is it that adding tons of voltage to my PROCESSOR cures the problem?

 

[OC Detective]

As I said the upper limit on any cpu is way beyond the 210FSB you mention. Historically the limitations on FSB have always been other parts of the system such as mobo north/southbridge, RAM etc.
Possibly the limit on frequency has been reached for this cpu but certainly not on the FSB alone. You may need to look at the limitations of the mobo and modding it.
http://www.maximumoc.com/guides/a7n8x_modding.html
A check on the voltage rails would not go amiss either neither would setting the L12's on the cpu to a 166 or 200FSB at default (improves the "communication" with the northbridge).

 

[linksep]

Well I got it at 2.3 stable with 1.75v (177x13) after doing the Socket wire trick but I am still wondering about the inability to run a high FSB. Is it in need of the L12 mod to run those high FSB without a ton of voltage?

The only thing it does is change the default FSB (usually done to change it to 200MHz). For some (unknown AFAIK) reason, the NF2 chipset can take higher FSBs when the default FSB is higher. For example, to get over ~230MHz, you pretty much require a CPU with a 200MHz default.

 

[br408408]

I had to do the L12 mod to get over 193 on my NF7-S Rev2 with the 2600 Mobile I now have and with an old XP2400 I had some time ago. My NF7-S hits a wall at 193 for a 133 CPU. After the L12 mod, only my memory would hold me back.
Also, I have used some Corsair XMS PC2700 LL in the past, and found it good to over 200 mhz, I just had to set the timmings a little looser

 

[linksep]

Also, I have used some Corsair XMS PC2700 LL in the past, and found it good to over 200 mhz, I just had to set the timmings a little looser

You said you had to do the L12 mod to get over 193FSB... which L12 did you do (166 or 200 default) and what FSB did you get after the L12?

Well I got the memory runnin 11-3-3-2.5 with 2.8v (max available in my bios) and it is Memtest x86+ stable at 210fsb. Do you think I could go faster if I set it looser? I'm not all that concerned about memory bandwith because I don't do much on this box besides internet, email, DVD burning, and the occasional FS2002. I want the speed for Folding@Home. I do however like to have the most available options as far as OCing goes (i.e. 250x10 or 166x15 and everything in between) because I'm crazy like that.

 

[br408408]

I did this L12 mod. The one listed for an Athlon XP with a stock FSB of 133 to get an FSB of 166....but on a Mobile the mod will make it auto sense at 200.
I think thats about what I got out of my Corsair...not sure as it was some time ago...I know it was over 200 mhz though. Right now it is running by SPD in my girl friends rig