OC Pentium 4 2.8GHz Northwood

[bmwpowere36m3]

PC Specs:

MOBO: TYAN S2099 Trinity i845 E
CPU: P4 2.8Ghz Northwood, Socket 478, Stepping D1
Memory: Crucial Tech PC2700 512MB DDR (2X, 1GB Total)
PS: Corsair HX520W ATX PSU

Just recently got into overclocking and wanted to see who else is running something similar CPU or CPU/MOBO-wise. Looking for some tips to overclocking.

Running Factory Settings:

Bus Speed: 133MHz (CPU-Z)
Multiplier: 21 (CPU-Z)
Vcore: 1.424 ~ 1.488V (CPU-Z) {CPU rated @ 1.525V}

CPU Temp: 37C IDLE (SpeedFan)
CPU Temp: 47C MAX via Prime95 (SpeedFan)

Current (2.8Ghz) Benchmarks:

Pifast: 66.75 seconds (10,000,000 points)

Sandra XII:
-CPU: Dhrystone 6220 MIPS, Whetstone 5171 MFLOPS
-MEM Band: Int 1811 MB/s, Float 1783 MB/s
-MEM Lat Random: 174ns, SpeedFactor 214.10

PCMark2002:
-CPU: 6745
-MEM: 5321
-HD: 1147

Need some ideas on OC, possibly Vcore modding since I can only increase Vcore ~1V. In the Tyan BIOS, the Vcore options are: Default(1.525...actually based on CPU-Z its ~1.456), +0.025, +0.05, +0.075

Thanks for your help.

 

[blackersabbath]

First off, Welcome to the forums.

Does your board allow you to change the FSB? You should use CoreTemp to monitor your temps too.

 

[xilix]

I don't think you'd need much more voltage than what your motherboard offers unless you're doing some really hardcore overclocking.

 

[bmwpowere36m3]

First off, Welcome to the forums.

Does your board allow you to change the FSB? You should use CoreTemp to monitor your temps too.

Yes, I can change the FSB...currently running it a 145MHz (~3GHz) on default voltage. So far so good, been running Prime95 (small FFT) for the last 7hrs and no problems. Will run it for a total of 10hrs and then switch to running (large FFT) for 10hrs. If all goes well I'll start bumping the FSB more.

*EDIT* Coretemp doesn't work with Pentium 4...

 

[JLK03F150]

Does your motherboard BIOS allow you to set the AGP/PCI Frequency? It should be manually set to 66mhz/33mhz. If you don't have the option to lock the AGP/PCI, your maximum FSB will be about 152mhz. Going higher can corrupt the data on your hard drive!

MotherboardMonitor5 or SpeedFan make work for temperature monitoring.

to ocforums

 

[bmwpowere36m3]

Does your motherboard BIOS allow you to set the AGP/PCI Frequency? It should be manually set to 66mhz/33mhz. If you don't have the option to lock the AGP/PCI, your maximum FSB will be about 152mhz. Going higher can corrupt the data on your hard drive!

MotherboardMonitor5 or SpeedFan make work for temperature monitoring.

to ocforums

Not sure I'll check, why will the max FSB be ~152MHz.

Oh and this is my VCard: BFG Asylum GeForce4 Ti4600 128MB, DDR, AGP

 

[JLK03F150]

If you don't have an AGP/PCI lock, those frequencies increase proportionally as you increase the FSB. Your hard drive communicates with the mobo on the PCI bus. If that frequency is too far out of spec it starts creating read/write errors. That limit is usually above 15%.

 

[bmwpowere36m3]

If you don't have an AGP/PCI lock, those frequencies increase proportionally as you increase the FSB. Your hard drive communicates with the mobo on the PCI bus. If that frequency is too far out of spec it starts creating read/write errors. That limit is usually above 15%.

The MOBO has a Phoenix AwardBIOS v1.10, the only settings I see and kindof unsure of are:

MEM Frequency: [DDR200, DDR266, Auto] (Set @ Auto)

Auto Detect PCI/DIMM Clk: [Enabled, Disabled] (Set @ Enabled)

Spread Spectrum: [Enabled, Disabled] (Set @ Disabled)

DRAM/AGP Voltage Regulator: [Default, +0.05, +0.10, +0.15] (Set @ Default)

If it isn't possible to lock the AGP/PCI speeds, is there any other way...i.e. jumpers, wiring, software?

Finally will it be okay to run @ the 150 FSB w/o incurring damage to the HD, or is there a way to look up the specs on the HD to see what it can do?

Current HD: Seagate Barracuda 7200.9 7200rpm 160GB HD

 

[bmwpowere36m3]

Still testing the current setup, but so far I have gotten to: 150Mhz FSB, which is 3.15GHz. I'm currently running Prime95 to make sure its stable...but I have run a quick check and so far so good.

A few questions: when using SpeedFan 4.33, I'm unsure of what each Temp (1,2,etc...), is? When running Prime95, Temp 3 goes from ~35C to 50C almost instantly. So I'm guessing that's the CPU temp. Then there's Temp 2, which seems to be locked @ 79C and then Temp 1 which changes a little (currently 45-46C) w/ an ambient temp of 20C. HD Temp is 30C.

Here are some preliminary benchmarks:

Pifast: 57.42 seconds (10,000,000 points)

Sandra XII:
-CPU: Dhrystone 7009 MIPS, Whetstone 5845 MFLOPS, 86W
-MEM Band: Int 2081 MB/s, Float 2017 MB/s
-MEM Lat Random: 153ns, SpeedFactor 218.7

PCMark2002:
-CPU: 7500
-MEM: 5913
-HD: 1326

Finally an interesting point, when looking at "System Info" in PCMark2002, under "CPU Info" it lists some specs...

Manu: Intel
Family: Pentium 4
Internal Clock: 3.08Ghz???
Internal Clock Maximum: 3.08Ghz???
External Clock: 150Mhz (remember 21X Multiplier)

 

[bmwpowere36m3]

Now it appears it doesn't want run stable @ 150Mhz FSB, w/ Vcore: +0.075V & VDRAM/AGP: +0.15V. It'll run Prime95 for 1hr and then there's an error.

Now I'm back to 145Mhz FSB @ stock voltage!, it's weird that I can't go higher than ~3.05Ghz (actually that's all the mobo is rated for a 533Mhz FSB, 3.06Ghz HT CPU), I don't know if that's got something to do with it and that I can’t lock PCI/AGP freq…

 

[JLK03F150]

You should be able to put the VDRAM/AGP to Default or maybe just +0.05v. You shouldn't need any more than that. I had mine at +0.15v with the FSB at 242mhz on my 3.4GHz P4 (17x200 default, 17x242 4.1GHz oc'ed).

What temp is the CPU reaching when running Prime95 at 150FSB for an hour?

Your Speedfan assumptions sound correct to me. The one rising quickly under load should be the CPU. The fixed temp is most likely a sensor your board doesn't have installed. The Temp1 is most likely your "system" temperature, a sensor on the mobo. It seems a little high. That temp should be in the low 30C's with a 20C ambient. Look for the air inlets on the lower front and side, and the outlet is in the back. Sometimes one or the other gets blocked.

You may find keeping it cooler will keep it stable at 3150MHz. Use CPUz to check your reported CPU speed. PCMark02 may just be reporting incorrectly.

 

[bmwpowere36m3]

Well I just dropped my FSB to 145Mhz and running Prime95 (LargeFFT) all day since 8am.

Speedfan:
Temp 1: 44C
Temp 2: 79C
Temp 3: 47C (CPU)
HD0: 28C

Ambient: 19C

CPUZ:
Core Speed: 3045Mhz
Core Voltage: 1.408

When running 150Mhz FSB, the core temp got up to 50-52C.