Need P4 OCing help: I cant reach 167FSB on my 2.4B C1

[Krk3561]

Im running completely stable at 161FSB w/ 1.584V idle/1.558V load (board undervolts, 1.6V in bios) on my 2.4B SL6EF C1 on an Abit IC7 with HyperX PC3500. If I bump the Vcore up to even 1.65V in the bios, it will not boot up into Windows. Is this just my chip thats preventing me, is there anything besides more Vcore I should try something to see if I can get to 167FSB (I dont want to run more than 1.6V because of the danger of SNDS)?

 

[Stormgiant]

Does it runs well at 166 ?

At 166 you can set your ram at DDR442.


Mine goes well until 168, after that it need a lot more voltage to run...
Doing 164 now for 100% stability.

 

[Duvie]

Is this a possible issue with these cantewood mobos and running p4b chips???

 

[Krk3561]

Whats the highest safe voltage for memory? It might be my memory limiting me because I'm running at 2.7V with 2-5-2-2 timings.

 

[Duvie]

Personally I would never go over 2.8v max....Have you tried lowering the NBS and the memory timings??? Talk to Thugs he has been really looking into that baord and lower fsbs (166-199 range)...

 

[THUGSROOK]

use bios version 10

in bios....

N/B Strap = 533
mem ratio = 1:1

you cant change the cas settings
if youd want to slow the ram down youll need to change the N/B strap to 667 or 800, 1:1

sounds stupid dont it?

 

[jdogg707]

with my 2.53 SL6S2 I can run @ 3.44GHZ or 181FSB with no problems at all on the IC7. My Vcore is at 1.625V and the Abit undervolts by .25V so it's actually at 1.6V. My memory settings revert to 2-3-3-6 at 533 HW Bootstrap. I have Geil Ultra Platinum PC3500...Not sure why it wouldn't work, have you tried resetting everything by clearing the CMOS

 

[maxSe]

Make sure you're running 1:1 memory ratio (don't use SPD). It won't matter which memory setting you use... As THUGS pointed out, NBS533 will give you the tightest timing. If you're using KHX3500 (2x256MB) with NBS533, it should default to 2-2-2-6. Use 2.7v for these ram. They like this voltage...

161FSB w/ 1.584V idle/1.68V load

Are you sure about this? That's awfully high voltage at load... Usually voltage drops under load... IC7 is the LEAST undervolting Abit board that I own (IT7 Max2 & BH7)...

Also, what was the highest fsb your 2.4B hit with your previous board?

 

[natgas]

I've been having a similar problem; can't get past 160 with my 2.4c; finally tried the vcore at 1.67 and it seemed very stable; however, now every program I run takes a long time to load--even new windows; hope I haven't damaged my cpu with the higher voltage; running bios 1.1 and although stable, it is slow and XP takes about 1 minute or more to load; big change from just yesterday.

 

[maxSe]

Originally posted by: natgas
I've been having a similar problem; can't get past 160 with my 2.4c; finally tried the vcore at 1.67 and it seemed very stable; however, now every program I run takes a long time to load--even new windows; hope I haven't damaged my cpu with the higher voltage; running bios 1.1 and although stable, it is slow and XP takes about 1 minute or more to load; big change from just yesterday.

2.4C?? Why aren't you running it at full 800fsb?

Also, use the shipping bios (v10). v11 has been tested to be a dud....

 

[Krk3561]

Originally posted by: maxSe
Make sure you're running 1:1 memory ratio (don't use SPD). It won't matter which memory setting you use... As THUGS pointed out, NBS533 will give you the tightest timing. If you're using KHX3500 (2x256MB) with NBS533, it should default to 2-2-2-6. Use 2.7v for these ram. They like this voltage...

161FSB w/ 1.584V idle/1.68V load

Are you sure about this? That's awfully high voltage at load... Usually voltage drops under load... IC7 is the LEAST undervolting Abit board that I own (IT7 Max2 & BH7)...

Also, what was the highest fsb your 2.4B hit with your previous board?

I changed the voltage in my original post, I typed it in wrong. It should be 161FSB w/ 1.584V idle/1.558V load.

I never OCed that much on my last rig because it was an 850E (RDRAM). I'm running stable at 165FSB now with 1.6V Idle/1.584V Load (1.625V in bios). I get errors at 163FSB w/ 1.625V in the bios. I dont want to go any higher with the voltage, so it looks like 162FSB is it. I would say its pretty good for my first OC.

 

[natgas]

"b"; sorry, my mistake; one thing, I was using the 1.0 bios but couldn't o/c at all; after updating, it seemed to help.

 

[maxSe]

Krk3561, that's what I thought regarding your voltage... ~160fsb isn't so bad. May be that's your chip's limit. (I know THUGS went through like 4 C1 chips before he found one that can go past 175 fsb... )

natgas, what kind of memory are you using? NBS setting? How far were you able to push the chip before?

 

[snowwie]

yeah, another note about the chip's limit...

I have an SL6EF plant 7 (phillipinnes) week 36

165fsb is pushing it...at 1.7v

what week and plant are you?

 

[natgas]

Crucial 2700, 2 512; have the NB at 533; manually set timings at 2.5,3,3,7; on my Gig board, I ran it at 168 with no problems; I'm kind of happy with the 160 (course I would like to go higher), but I'm more concerned about the temps----seems to me that low 50's at startup/idle is much too high;

 

[Krk3561]

Originally posted by: snowwie
yeah, another note about the chip's limit...

I have an SL6EF plant 7 (phillipinnes) week 36

165fsb is pushing it...at 1.7v

what week and plant are you?

Heres my 2.4B's codes:

Stepping code: SL6EF

FPO/BATCH #: 3231A416 (Costa Rica)

VERSION #: C10670-001

Pack Date: 9/25/02

Also, I am using an Alpha PAL8942 w/ 80mm Enermax adjustable fan and AS3

 

[snowwie]

week 31... yeah it must be the CPU limit

they didn't start getting consistently good until around week 38-39
I believe week 38 phillipines was a really good batch

 

[Bad Dude]

Originally posted by: natgas
I've been having a similar problem; can't get past 160 with my 2.4c; finally tried the vcore at 1.67 and it seemed very stable; however, now every program I run takes a long time to load--even new windows; hope I haven't damaged my cpu with the higher voltage; running bios 1.1 and although stable, it is slow and XP takes about 1 minute or more to load; big change from just yesterday.

Before you think it's the CPU, have a look at this. Remove the cold fix and see what happen.