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P3 1GHZ (100FSB) build

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First post, by pete8475

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I spotted a 1GHZ socket 370 100MHZ FSB P3 on ebay a while back and bought it right away, finally got around to playing around with it a bit last night and today.

I also recently got a new old stock AOPEN QF50A beige case so I put the build in there.

Specs:
Intel Pentium 3 1GHZ (SL5QV)
Asus CUBX-E
512MB PC133 CL2 (2x256)
Geforce 5900XT 128MB
120GB Kingston SATA SSD
Sounblaster AWE64
3COM 10/100 ISA NIC
LG DVD-ROM
Belkin USB 2.0 card
EVGA 500W Power Supply
Windows 98SE

Obviously the video card is way overpowered for this processor but I wanted to see how the performance would scale up with some overclocking. 1241MHZ is the fastest I can get it to in this board, the next FSB choice is 133 and it does not post at that speed.

The Belkin USB card has an NEC chip and this one is nice because it does NOT negatively effect performance! I learned about this card here on vogons and bought several after that.

Anyway here are some basic benchmark results, I also ran the tests with my 128MB TI4200 to see how that compared to the 5900XT.

Also attached are some pics of the machine and CPU-Z.

3dmark99
ti4200 - 7545 - 1000mhz cpu - 45.23
ti4200 - 7306 - 1000mhz cpu - 56.64
ti4200 - 9315 - 1241mhz cpu - 45.23
fx5900xt - 4754 - 667mhz cpu
fx5900xt - 7170 - 1000mhz cpu
fx5900xt - 8017 - 1100mhz cpu
fx5900xt - 8905 - 1241mhz cpu

3dmark2000
ti4200 - 6893 - 1000mhz cpu - 45.23
ti4200 - 6799 - 1000mhz cpu - 56.64
ti4200 - 8574 - 1241mhz cpu - 45.23
fx5900xt - 4271 - 667mhz cpu
fx5900xt - 6480 - 1000mhz cpu
fx5900xt - 7290 - 1100mhz cpu
fx5900xt - 8249 - 1241mhz cpu

3dmark2001
ti4200 - 6410 - 1000mhz cpu - 45.23
ti4200 - 6251 - 1000mhz cpu - 56.64
ti4200 - 7697 - 1241mhz cpu - 45.23
fx5900xt - 4777 - 667mhz cpu
fx5900xt - 6601 - 1000mhz cpu
fx5900xt - 7234 - 1100mhz cpu
fx5900xt - 8024 - 1241mhz cpu

3dmark2003
ti4200 - 1155 - 1000mhz cpu - 45.23
ti4200 - 1146 - 1000mhz cpu - 56.64
ti4200 - 1247 - 1241mhz cpu - 45.23
fx5900xt - 3494 - 667mhz cpu
fx5900xt - 3851 - 1000mhz cpu
fx5900xt - 3940 - 1100mhz cpu
fx5900xt - 4044 - 1241mhz cpu

Quake 1
ti4200 - 321.8fps - 1000mhz cpu - 45.23
ti4200 - 297.7fps - 1000mhz cpu - 56.64
ti4200 - 376.1fps- 1241mhz cpu - 45.23
fx5900xt - 227.9fps - 667mhz cpu
fx5900xt - 334.3fps - 1000mhz cpu
fx5900xt - 359.5fps - 1100mhz cpu
fx5900xt - 395.0fps - 1241mhz cpu

Quake 3
ti4200 - 83.9fps - 1000mhz cpu - 45.23
ti4200 - 87.6fps - 1000mhz cpu - 56.64
ti4200 - 107.7fps - 1241mhz cpu - 45.23
fx5900xt - 51.6fps - 667mhz cpu
fx5900xt - 82.8fps - 1000mhz cpu
fx5900xt - 89.1fps - 1050mhz cpu
fx5900xt - 93.3fps - 1100mhz cpu
fx5900xt - 107.0fps - 1241mhz cpu

EDIT - added 667mhz results.
EDIT 2 - added 45.23 results for ti4200 at 1ghz cpu speed, I also went ahead and added 1241mhz results because it doesn't take long to do these tests.

Last edited by pete8475 on 2026-03-29, 02:56. Edited 3 times in total.

Reply 1 of 22, by Disruptor

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Which driver version do you use for your graphics cards?

Reply 2 of 22, by pete8475

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Disruptor wrote on 2026-03-27, 01:43:

Which driver version do you use for your graphics cards?

56.64 on both.

Reply 3 of 22, by TheIpex

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Nice build, I didn't know 440BX boards could be had with 4 RAM slots.

Intel 486DX2 66MHz
Intel Pentium MMX 233MHz
Intel Pentium III-S 1400MHz
Intel Pentium G3258 4600MHz

Reply 4 of 22, by RetroPCCupboard

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Very interesting that the 4200 seems to beat the 5900XT in most win9x era benchmarks. That's despite the fact you are using the same drivers for both. The gap may be even wider if you used older drivers on the 4200.

Reply 5 of 22, by shevalier

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With two 133 MHz memory sticks, the CUBX should made the 133 MHz bus without any problems at all.
It’s just that the official Coppermine models only went up to 1.1 GHz; the 1.133 GHz versions were recalled.
If you want to stick with the Coppermine core, look for a lower-end model in the series.
For example, the 750 MHz version should support a 133 MHz FSB without any problems at all. Or a Tualatin with a soldered bridge pcb.

Aopen MX3S, PIII-S Tualatin 1133, Radeon 9800Pro@XT BIOS, Audigy 4 SB0610
JetWay K8T8AS, Athlon DH-E6 3000+, Radeon HD2600Pro AGP, Audigy 2 Value SB0400
Gigabyte Ga-k8n51gmf, Turion64 ML-30@2.2GHz , Radeon X800GTO PL16, Diamond monster sound MX300

Reply 6 of 22, by pete8475

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shevalier wrote on 2026-03-27, 06:24:
With two 133 MHz memory sticks, the CUBX should made the 133 MHz bus without any problems at all. It’s just that the official Co […]
Show full quote

With two 133 MHz memory sticks, the CUBX should made the 133 MHz bus without any problems at all.
It’s just that the official Coppermine models only went up to 1.1 GHz; the 1.133 GHz versions were recalled.
If you want to stick with the Coppermine core, look for a lower-end model in the series.
For example, the 750 MHz version should support a 133 MHz FSB without any problems at all. Or a Tualatin with a soldered bridge pcb.

Indeed that board does work fine at 133 fsb and with that 5900xt card, I've used it for years with a 1.4 P3-S and a powerleap adapter.

Reply 7 of 22, by shevalier

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pete8475 wrote on 2026-03-27, 10:40:
shevalier wrote on 2026-03-27, 06:24:
With two 133 MHz memory sticks, the CUBX should made the 133 MHz bus without any problems at all. It’s just that the official Co […]
Show full quote

With two 133 MHz memory sticks, the CUBX should made the 133 MHz bus without any problems at all.
It’s just that the official Coppermine models only went up to 1.1 GHz; the 1.133 GHz versions were recalled.
If you want to stick with the Coppermine core, look for a lower-end model in the series.
For example, the 750 MHz version should support a 133 MHz FSB without any problems at all. Or a Tualatin with a soldered bridge pcb.

Indeed that board does work fine at 133 fsb and with that 5900xt card, I've used it for years with a 1.4 P3-S and a powerleap adapter.

Based on my experience and experiments with the i815, the Pentium 3 1+ GHz suffers from a critical lack of FSB speed.
In other words, the P3E 1000 (124 MHz FSB) and the P3E 850 (140 MHz FSB, assuming it boots at that frequency) will deliver different performance levels despite having similar core frequencies (~1.2GHz).
For a CUBX with two CL2 memory stick, 140 MHz is a perfectly achievable goal.

Aopen MX3S, PIII-S Tualatin 1133, Radeon 9800Pro@XT BIOS, Audigy 4 SB0610
JetWay K8T8AS, Athlon DH-E6 3000+, Radeon HD2600Pro AGP, Audigy 2 Value SB0400
Gigabyte Ga-k8n51gmf, Turion64 ML-30@2.2GHz , Radeon X800GTO PL16, Diamond monster sound MX300

Reply 8 of 22, by Intel486dx33

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Man, every time I read a New post about computer builds I get the urge to build another one.
But I have run out of room to store them.

Reply 9 of 22, by pete8475

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shevalier wrote on 2026-03-27, 11:11:
Based on my experience and experiments with the i815, the Pentium 3 1+ GHz suffers from a critical lack of FSB speed. In other […]
Show full quote
pete8475 wrote on 2026-03-27, 10:40:
shevalier wrote on 2026-03-27, 06:24:
With two 133 MHz memory sticks, the CUBX should made the 133 MHz bus without any problems at all. It’s just that the official Co […]
Show full quote

With two 133 MHz memory sticks, the CUBX should made the 133 MHz bus without any problems at all.
It’s just that the official Coppermine models only went up to 1.1 GHz; the 1.133 GHz versions were recalled.
If you want to stick with the Coppermine core, look for a lower-end model in the series.
For example, the 750 MHz version should support a 133 MHz FSB without any problems at all. Or a Tualatin with a soldered bridge pcb.

Indeed that board does work fine at 133 fsb and with that 5900xt card, I've used it for years with a 1.4 P3-S and a powerleap adapter.

Based on my experience and experiments with the i815, the Pentium 3 1+ GHz suffers from a critical lack of FSB speed.
In other words, the P3E 1000 (124 MHz FSB) and the P3E 850 (140 MHz FSB, assuming it boots at that frequency) will deliver different performance levels despite having similar core frequencies (~1.2GHz).
For a CUBX with two CL2 memory stick, 140 MHz is a perfectly achievable goal.

I might buy a 100mhz fsb P3-900 and see if I can get that stable at 1.2. That way everything is in spec except agp (this card is fine with 89mhz agp) and it obviously would downclock nicely to 600mhz (66mhz fsb) as well.

Reply 10 of 22, by pete8475

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RetroPCCupboard wrote on 2026-03-27, 05:44:

Very interesting that the 4200 seems to beat the 5900XT in most win9x era benchmarks. That's despite the fact you are using the same drivers for both. The gap may be even wider if you used older drivers on the 4200.

I'll update with test results using 45.23 on the ti4200 shortly.

Reply 11 of 22, by H3nrik V!

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pete8475 wrote on 2026-03-27, 22:08:
shevalier wrote on 2026-03-27, 11:11:
Based on my experience and experiments with the i815, the Pentium 3 1+ GHz suffers from a critical lack of FSB speed. In other […]
Show full quote
pete8475 wrote on 2026-03-27, 10:40:

Indeed that board does work fine at 133 fsb and with that 5900xt card, I've used it for years with a 1.4 P3-S and a powerleap adapter.

Based on my experience and experiments with the i815, the Pentium 3 1+ GHz suffers from a critical lack of FSB speed.
In other words, the P3E 1000 (124 MHz FSB) and the P3E 850 (140 MHz FSB, assuming it boots at that frequency) will deliver different performance levels despite having similar core frequencies (~1.2GHz).
For a CUBX with two CL2 memory stick, 140 MHz is a perfectly achievable goal.

I might buy a 100mhz fsb P3-900 and see if I can get that stable at 1.2. That way everything is in spec except agp (this card is fine with 89mhz agp) and it obviously would downclock nicely to 600mhz (66mhz fsb) as well.

The thing with 900/100s is that there were never sold many back in the day, I have yet to come across one for a price, I'm comfortable paying ..

If it's dual it's kind of cool ... 😎

--- GA586DX --- P2B-DS --- BP6 ---

Please use the "quote" option if asking questions to what I write - it will really up the chances of me noticing 😀

Reply 12 of 22, by pete8475

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H3nrik V! wrote on 2026-03-29, 06:41:
pete8475 wrote on 2026-03-27, 22:08:
shevalier wrote on 2026-03-27, 11:11:

Based on my experience and experiments with the i815, the Pentium 3 1+ GHz suffers from a critical lack of FSB speed.
In other words, the P3E 1000 (124 MHz FSB) and the P3E 850 (140 MHz FSB, assuming it boots at that frequency) will deliver different performance levels despite having similar core frequencies (~1.2GHz).
For a CUBX with two CL2 memory stick, 140 MHz is a perfectly achievable goal.

I might buy a 100mhz fsb P3-900 and see if I can get that stable at 1.2. That way everything is in spec except agp (this card is fine with 89mhz agp) and it obviously would downclock nicely to 600mhz (66mhz fsb) as well.

The thing with 900/100s is that there were never sold many back in the day, I have yet to come across one for a price, I'm comfortable paying ..

Good to know, I haven't even looked yet to be honest.

Reply 13 of 22, by zuldan

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Intel486dx33 wrote on 2026-03-27, 11:52:

Man, every time I read a New post about computer builds I get the urge to build another one.
But I have run out of room to store them.

Have you got a list of your builds somewhere? Love seeing machine specs.

Reply 14 of 22, by zuldan

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Looking forward to seeing 45.23 / ti4200 results

Reply 15 of 22, by pete8475

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zuldan wrote on 2026-03-29, 06:55:

Looking forward to seeing 45.23 / ti4200 results

They are in the first post.

Reply 17 of 22, by pete8475

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RetroPCCupboard wrote on 2026-03-29, 09:21:
pete8475 wrote on 2026-03-29, 07:47:
zuldan wrote on 2026-03-29, 06:55:

Looking forward to seeing 45.23 / ti4200 results

They are in the first post.

Nice. Apart from Quake III, all benchmarks were higher with the older driver.

Yep, I'm likely going to leave the ti4200 in there with the 45.23 driver unless there's another version worth testing. I have a P4 for playing the DX9 games anyway.

Reply 18 of 22, by pete8475

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There's not much airflow in this case, eventually I'll cut out the fan opening on the back to allow more. So I've gone ahead and attached a fan to the side of the Zalman cooler on the ti4200, the fx5900xt has a fan so it seemed fine.

Also the soundcard kept ending up with a weird irq when the isa nic was in here so I've swapped that out for a pci nic and now the soundcard plays nicer with dos games.

Reply 19 of 22, by AlexZ

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pete8475 wrote on 2026-03-27, 22:08:

I might buy a 100mhz fsb P3-900 and see if I can get that stable at 1.2. That way everything is in spec except agp (this card is fine with 89mhz agp) and it obviously would downclock nicely to 600mhz (66mhz fsb) as well.

CUBX is a 133Mhz FSB board, 1Ghz@133 is the best choice. It may be possible to run it at 500Mhz with 66Mhz FSB. 100Mhz FSB versions suffer from FSB overload at about 900Mhz and higher.

My PIII 900 is enough for the whole Windows 98 era and very early Windows XP (~2002).

fx5900xt is for P4/Athlon XP/Athlon 64 (s754). If you want to max it out in Windows 98 then get Athlon 64 with AGP. GeForce 4200ti is a good match for PIII.

H3nrik V! wrote on 2026-03-29, 06:41:

The thing with 900/100s is that there were never sold many back in the day, I have yet to come across one for a price, I'm comfortable paying ..

That's why I got an extra PIII 900 while they were cheaper. I have also seen 1.1Ghz@100 on sale, but those are even more rare.

Pentium III 900E,ECS P6BXT-A+,384MB,GeForce FX 5600, Voodoo 2,Yamaha SM718
Athlon 64 3400+,Gigabyte GA-K8NE,2GB,GeForce GTX 275,Audigy 2 ZS
Phenom II X4 955,Gigabyte GA-MA770-UD3,8GB,GeForce GTX 780
Vishera FX-8370,Asus 990FX,32GB,GeForce GTX 980 Ti