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How to improve overclock on i875P Canterwood?

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Parabellum27

Senior member
Hello,

I got my new P4 3.4C ES chip and I am now trying to find the sweet spot for this chip regarding FSB/memory/CPU frequencies.

Ok, I have flashed my motherboard to BIOS 1018 which did improve substantially. However, when I try upping the FSB, it crashes once I go over 250FSB. I have multipliers unlocked from 12X to 17X on this chip. I have had the CPU up to 3.9GHz with air cooling but when I try 14 X 255 or 252MHz, it crashes. My computer is in the basement which is pretty cold (19-20ºC approx.) and the side panel is removed so I know cooling is not an issue.

I see a lot of people running their FSB up to 300MHz?! Why their motherboard can while mine cannot? Ok I know, overclocking is luck of the draw but even Anand acheived 288MHz with stock cooling (see P4C800-E review).

So, what are the best solutions to improve overclocking on the FSB? I am thinking right now to remove the passive heatsink, scratch the TIM and clean the bottom and then apply a thin layer of AS5 and slap it down. I have also tought of buying a Thermalright NB-1C to match my SP-94 but it seem that it will not fit. Are there some active cooling solution for north bridges but with a lower profile?

Thanks for any infos,

Para
 
I have the same "non e" board FSB doesn't go over 260ish only running 2.4@3.0 though
from what i've read you may need to add a little more voltage on the ram and cpu -- 1 or 2 steps up? 2.55v ram - not sure of stock vcore
also the timings cant be too tight, I guess that's why people recommend the expensive ram
also -- do you know where I can get documentation on the 1018 bios -- its still in beta? any bugs? -- still using 1017 myself

don't know if linking to other forums is allowed but you may want to read this
http://www.tweaknews.net/forum/viewtopic.php?t=568
http://forums.devhardware.com/archive/t-7668

fsb 300 is definatley not guaranteed -- I'd like to get there myself but hey 🙂
 
Hello,

Thanks for replying. I forgot to mention that I am using a 5/4 divider. So, my FSB is 250MHz while my memory is still at 200MHz with stock timings. To answer your question, I am using a TwinX set of XMS3200LLPT from Corsair. I have had that memory up to 220MHz with CAS 2.5-3-2-6 and whenever I try to up the FSB a little bit more, the system refuses to boot. I have also tried more relaxed timings but it seems this is not a memory issue. I ran my memory at 2.75V all day long.

Here is my system as of now :

Intel Pentium 4 3.4C ES @ 3.75GHz (15 x 250MHz)
Thermalright SP-94 & Panaflo FBA09A12M
Asus P4C800-E Deluxe V1.02
512mb Corsair TwinX XMS3200LLPT V1.2
Lian Li PC-65B & Enermax EG465P-VE
Adaptec 29160N Ultra160 SCSI
Seagate Cheetah X15 36LP 36.7gb Ultra160 SCSI
Seagate Barracuda 7200.7 80.0gb SATA
ATI Radeon 9800 Pro 128mb
Plextor PlexWriter Premium

As you see, I have a revision 1.02 motherboard. I don't know what are the differences between the 2.00 and the 1.02 but people always prefer revisions 2.00 from Asus. I don't know if this can affect overclocking.

Also, I have noticed a strange behavior. My system is more instable and less overclockable when using my SCSI as boot drive than the SATA. With my SATA, I can easily hit 3.9GHz while with the SCSI, the system gives BSOD or have difficulties to boot into windows. I guess this is a PSU issue. I know these 15K RPM drives are power hungry but heck, that much?

Xsilver :

You can download BIOS 1018 on Asus website. This is the 1018.004 non-beta BIOS. I think you have to upgrade the Asus update utility prior to flash to this BIOS. So far, this BIOS is way much better than that 1017 crap. This is for me but from what I have read before flashing to it, the vast majority of feedbacks are pretty positive about this one. I have also noticed that BIOS 1017 has been removed from the Asus website which leads me to think that this BIOS had too much issues.

Also, thanks for the links, I will give head to this.

Para
 
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