PB4266-C & NW1.6A, someone help, please :)

f13dfx

Member
Oct 12, 1999
190
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Here is my rig right now, combination of old and new parts:

Asus P4B266-C
Northwood 1.6A @ 2.133mhz using 1.60 voltage core
(removed black layer and foil underneath retail heatsink/fan and replaced with thermal paste)
17" Generic Case w/front intake fan & upper outtake "chimney" fan, 250W Power Supply
Micron 128mb DDR-SDRam 2.5CL
Creative Ultra TNT2 32mb video card
Creative PCI 128 Soundblaster
RealMagic Hollywood Mpeg Decoder Card
3C905TX Network Card (for cable internet)
SOHOware 10/100 PCI Network Card (for sharing internet)
PCTel 56K PCI Modem Card
Tekram SCSI-2 Card
Western Digital 40GB 7200rpm ATA100 Hard Drive
Toshiba SD-M1202 DVD-Rom Drive
Yamaha 8824S SCSI CDRW Drive

Just purchased mobo, cpu and memory yesterday. All the rest are components I already had.

So I booted up and just changed bios to 2133mhz without doing anything else and everything booted up perfectly in Win2000 (Service Pack 2). Upped core voltage to 1.60v to get stability running 3DMark2001 Looping Demo and ran overnight without any problems. MBM5 reported idle temp of 25 Celsius with full load at 34 Celsius (using Asus 2 setting, not Asus 2 CUSL2).

Today, I tried bumping up FSB manually with great results. Actually got all the way up to 142FSB (2.272mhz) @ 1.70v and ran 3DMark2001 successfully.

All that time I spent bumping up in increments, I just restarted and never shutdown. When I got up to 142FSB, I shut down to grab a coffee. To my surprise, when I tried to turn on the PC, it would not even start up the monitor. I ended up having to turn OFF the power supply's power switch, which reset the bios automatically and took me to the bios setup screen upon bootup. Do I need a better power supply to cure this? Which one would you recommend? I have access to Antec and Enermax models.

It seems that this Northwood 1.6A can do more. I would sure love to get to 2400mhz, maybe by doing the "wire trick" to get more voltage. BTW, my mobo beeps all the time while booting up. I've unhooked the pc speaker as it is very annoying and doesn't seem to affect anything right now.

I need your recommendations as to what else I can do to get to 2400mhz.

BTW, when running 3DMark2001, is the LOOPING DEMO the one I should run?
And does the USB 1.1 problem only occur after you go past 150FSB?

Thanks in advance!

P.S. This is the most fun I've had overclocking since the Celeron 300A days!
 

MrDudeMan

Lifer
Jan 15, 2001
15,069
94
91
i dont know a whole lot...but i think 250w is WAYYYYYYY too low for that. i would at least get 300, but preferably 350...i dont know really but from what i read that looks like the minimun sizes for PSU's
 

Flatbroke

Senior member
Nov 30, 2000
721
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Turbo 1 in Bios, Advanced - Chipset? =(memory) locks PCI and AGP buses to nearer the right speed. Set memory to 1:1 at those speeds.