Can't get FSB past 255

[ytoledano]

I have a P4 2.4C with a Thermalright SLK-947U, and Abit IS7-E and 2*256 Corsair PC3200LL memory. I can easily get my system to 250 FSB at 5:4 mode but any increase over 255 won't let system boot, even though I set Vcore to 1.675, VDIMM to 2.7 and timings to 3-4-4-8. Any advice?

Is 2^33634943 prime? (more than 10Mil digits @55.5%) I will know in 2 weeks when <A HREF="http://www.mersenne.org" target="_new">Prime95</A> finishes checking!<P ID="edit"><FONT SIZE=-1><EM>Edited by ytoledano on 12/06/03 12:30 PM.</EM></FONT></P>

 

[TheMASK]

even though I set Vcore to <b>2.675</b>

I am sure u meant 1.675V

<font color=red>
Barton 2500+ @ 10x222 = 2225MHz
A7N8X Dlx Rev 2.0
Kingston Hyper-X 2x256MB DDR500 @CL2.5-4-3-7
IBM 80GB + Seagate SATA 2x120GB
MX440 64MB/4X GPU/Memory : 388/513MHz
</font color=red>

 

[ytoledano]

Uh, yeah, cause the proccessor's still there and hasn't melted.

Is 2^33634943 prime? (more than 10Mil digits @55.5%) I will know in 2 weeks when <A HREF="http://www.mersenne.org" target="_new">Prime95</A> finishes checking!

 

[TheMASK]

LOL...

<font color=red>
Barton 2500+ @ 10x222 = 2225MHz
A7N8X Dlx Rev 2.0
Kingston Hyper-X 2x256MB DDR500 @CL2.5-4-3-7
IBM 80GB + Seagate SATA 2x120GB
MX440 64MB/4X GPU/Memory : 388/513MHz
</font color=red>

 

[scottchen]

Ytoledano, I think i figured something out, your max FSB decreases when you use 5:4 or 3:2 ratios. Yesterday I was playing around with my friend's system, i brought over my PC4000 memory, at 1:1 Ratio, it reached 278mhz, I think that's because of memory's limiting it. However when i went to 5:4 ratio computer won't boot at 260FSB, 3:2 computer won't boot at 270FSB. He had a P4C800 Deluxe. Could anybody confirm this for me please? All P4 owners please try this.

-Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -XFX 5900 128meg 450/900 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU

 

[ytoledano]

Interesting. If it's true I's have to guess that a component is being stressed or something and the only thing tha comes in mind is the NB, unless there's another chip that takes care of the mem:CPU ratio.

Is 2^33634943-1 prime? (more than 10Mil digits @58.33%) I will know in 2 weeks when <A HREF="http://www.mersenne.org" target="_new">Prime95</A> finishes checking!

 

[scottchen]

This doesn't make any sense, maybe it's just my friend got a sh*tty mobo.

-Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -XFX 5900 128meg 450/900 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU

 

[HardWareBoss]

So leave it at 1:1

 

[scottchen]

But he has sh*tty PC3200 Hynix memory.

-Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -XFX 5900 128meg 450/900 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU