If that’s the case should test over clocking
Some antique Pc200 and pc266 ddr

I'm recapping some of my old motherboards, with polymer caps. This is called "polymod". Right now, I'm thinking about recap my P6S5AT. Every cap was made by G-Luxon.

The bigger caps is 1500uf/6.3v/10mm (x21 or x22)

There are x4 1000uf/10v/8mm

And x4 470uf/16v/8mm

About the smaller ones, if I really recap, I'll leave the way it is or I'll replace, at least, the 100uf/16v (x13 or x14).

In the past, do you saw problems with this capacitors mobo ?

VooDooMan wrote on 2021-04-08, 07:39:

Sorry, I haven't checked in here for a while...

Kami27 wrote on 2020-08-21, 17:32:

You talked about a software called CMOSTool to overclock the FSB but I really can't find it anywhere, could you help me please ?

If you are still interested please write me a PM.

Hi, I'm also interested but I can't compose PM's for now, can you write me one ?
Thank you.

The worst thing happened to me, I have a Jetway J-635CS, 2x 1gb DDR 400 Kingston, Radeon HD 3650, Pentium III 1.1 GHz SL5QW Coppermine aka fastest coppermine, and pretty much the best 370 setup.
I switched PSU's and suddenly no post, switched back to the old one still no post, the CPU fan spins for a second then nothing, the cpu gets warm, but the chipset is cold, I checked everything seems the mosfet shorted so i can't get correct reading on the caps, and the GPU's caps blew. I pray that I'll manage to fix the motherboard, even if I have to re-solder the whole thing from ground up, hope the chipset is fine because that would be a real pain in the ass to source and solder even then it might not be compatible.

Just had to write this down here as a 635 user in pain 😒 If anyone has any advice I'll be super thankful!
Also I've got a dead Intel D815 board, it worked 10 years ago and the whole PC was just stashed away, the caps were dead so I recaped it and it still wont post,
why are they selling those 2 ancient boards for huge amounts of money? I can't find anything under a couple hundred dollars.

The family is getting biggger 😁

Here are all the possible revs and all mobos I have collected with the date of production:

Rev 1.3 - 01.04.24

Rev 1.5 - 01.05.22

Rev 1.5 - 01.05.23

Rev 1.5 - 01.06.28

Rev 1.6 - 01.08.29

Rev 1.6 - 01.09.04

Rev 1.6 - 02.02.14

Rev 1.6 - 02.02.19

Rev 1.6 - 02.07.11

In case you have this board and you want to participate in this project please provide your rev and date of production 😉 The higher rev with production date the bigger OC potential 😀

1) Rev 1.3 - 01.04.24 - NO OC potential (Tualatins work only at 66 FSB)

2) Rev 1.5 - 01.05.22
3) Rev 1.5 - 01.05.23 - Tualatin Support, Coppermines work good at 166 MHz, Tualatins only at 150 MHz.
4) Rev 1.5 - 01.06.28

5) Rev 1.6 - 01.08.29 - Tualatin Support, Coppermines work good at 166 MHz, Tualatins have some problems at 166 MHz.
6) Rev 1.6 - 01.09.04

7) Rev 1.6 - 02.02.14
😎 Rev 1.6 - 02.02.19 - Tualatin Support, Coppermines work good at 166 MHz, Tualatins can work better at 166 MHz.
9) Rev 1.6 - 02.07.11

All revs support 2 GB of Ram (not only 1,5 GB as suggested by the chipset producer)

When it comes to HDD the maximum transfer rate is around 82,4 MB/sec (ATA UDMA100 onboard controller)
Here's how it scales with FSB:

66FSB - 78,8 MB/sec

100FSB - 81,1 MB/sec

133FSB - 81,7 MB/sec

150FSB - 82,6 MB/sec


166FSB - 82,4 MB/sec

Here's how long it takes to boot into windows on 166 FSB:
https://www.youtube.com/watch?v=SEiI4V9jP1g - Tualatin
https://www.youtube.com/watch?v=VSTXBHm6F2k - Coppermine

gabimor wrote on 2022-01-06, 22:22:

In the past, do you saw problems with this capacitors mobo ?

Those caps were of low quality just like the vast majority from that period of time 😉

JustJulião wrote on 2022-02-08, 19:36:

Hi, I'm also interested but I can't compose PM's for now, can you write me one ?

I attach everything you need.

Mazuto wrote on 2022-10-07, 22:36:

Just had to write this down here as a 635 user in pain 😒

I feel for you 🙁 I just hope you will be able to get this mobo back to life! In case you need help just PM me 😀

I would also like you to make so HQ photos of your mobo and make them public - THERE ARE NO GOOD PHOTOS IN THE WHOLE INTERNET 😉 You are the lucky owner of Jetway J-635CS 😁 Please share 😉

Hi, I am also tinkering around with a P6s5AT. At the moment I am using a PIII-S 1400 MHz and there is absolutly no OC potential. Even at 138 MHz FSB it didn't boot into Windows.
I purchased a 1333 MHz PIII with 256k in China to ckeck if the 512k cache are the limiting problem. But I guess it will take some weeks to be shipped.

In the meantime, I would kindly ask if there is something worth cheking out with the 512k Tualatin. Are there maybe any chipset registers to set or anything else that could be tweaked?
Or is it all just about having the right batch of the Mainboard to get the 512k Tualatins running at higer FSB frequencies? My Revision is 1.5A.
And where is the manufacturing date written?

Thanks

3faltigkeit wrote on 2023-12-13, 18:44:

Hi, I am also tinkering around with a P6s5AT. At the moment I am using a PIII-S 1400 MHz and there is absolutly no OC potential. […]
Show full quote

Hi, I am also tinkering around with a P6s5AT. At the moment I am using a PIII-S 1400 MHz and there is absolutly no OC potential. Even at 138 MHz FSB it didn't boot into Windows.
I purchased a 1333 MHz PIII with 256k in China to ckeck if the 512k cache are the limiting problem. But I guess it will take some weeks to be shipped.

In the meantime, I would kindly ask if there is something worth cheking out with the 512k Tualatin. Are there maybe any chipset registers to set or anything else that could be tweaked?
Or is it all just about having the right batch of the Mainboard to get the 512k Tualatins running at higer FSB frequencies? My Revision is 1.5A.
And where is the manufacturing date written?

Thanks

The 512k of cache are very unlikely to be the limiting factor here
I would investigate board stability (caps?), RAM, Power supply. I don't remember if that board comes with voltage settings, have you tweaked it? 138 seems low even at stock voltage though.

Mhm, the Power Supply should by fine. The caps have at least no visible issues (I know this does not mean that they are fine).
I tried different memory sticks. DDR and SDR. OCZ, Kingston, Infineon, MDT, Now I am using cheap Tiquila Sticks.
And there is nothing tweaked so far. Voltages are at default because they can not be changed. I also tried a SATA PCI Card if maybe the PCI BUS could be the culprit.
I am using a modded BIOS (based on latest official BIOS) which makes the supported FSB Settings available in the BIOS (100,133,138,150,166).
I also have aa Celeron 1200 MHz this one runs at 138 MHz. For 150 MHz it needs a volt mod to 1,65 V to be stable (1800 MHz). Until now, I didn't had time to do the mod.
But I will give it a try maybe next week. But what I get from VooDooMans postings is that there are issues with Tualatin CPUs with 512k with older revisions of this Board.

By the way, is there maybe some progress running the p6s5at at 200 MHz FSB? I wonder If the chipset is able to handle such high frequencies. I am searching for an alternative to the TUSL2. The TUSL2 has no issues with 200 MHz FSB. But the only Graphics Card which (which I found so Far) handles 100 MHz AGP clock is the GF3 Ti200. A working faster one would be great. The 6OXET has great deviders but using these is unstable. So the P6s5at ist the only other candidate that maybe could achieve this.

3faltigkeit wrote on 2023-12-22, 15:19:

By the way, is there maybe some progress running the p6s5at at 200 MHz FSB? I wonder If the chipset is able to handle such high frequencies. I am searching for an alternative to the TUSL2. The TUSL2 has no issues with 200 MHz FSB. But the only Graphics Card which (which I found so Far) handles 100 MHz AGP clock is the GF3 Ti200. A working faster one would be great. The 6OXET has great deviders but using these is unstable. So the P6s5at ist the only other candidate that maybe could achieve this.

Check you private messages please - you got all the answers there 😉

VooDooMan wrote on 2022-10-08, 17:51:

The family is getting biggger :D https://u.cubeupload.com/roksana/allboards.jpg […]
Show full quote

The family is getting biggger 😁

Here are all the possible revs and all mobos I have collected with the date of production:

Rev 1.3 - 01.04.24

Rev 1.5 - 01.05.22

Rev 1.5 - 01.05.23

Rev 1.5 - 01.06.28

Rev 1.6 - 01.08.29

Rev 1.6 - 01.09.04

Rev 1.6 - 02.02.14

Rev 1.6 - 02.02.19

Rev 1.6 - 02.07.11

In case you have this board and you want to participate in this project please provide your rev and date of production 😉 The higher rev with production date the bigger OC potential 😀

1) Rev 1.3 - 01.04.24 - NO OC potential (Tualatins work only at 66 FSB)

2) Rev 1.5 - 01.05.22
3) Rev 1.5 - 01.05.23 - Tualatin Support, Coppermines work good at 166 MHz, Tualatins only at 150 MHz.
4) Rev 1.5 - 01.06.28

5) Rev 1.6 - 01.08.29 - Tualatin Support, Coppermines work good at 166 MHz, Tualatins have some problems at 166 MHz.
6) Rev 1.6 - 01.09.04

7) Rev 1.6 - 02.02.14
😎 Rev 1.6 - 02.02.19 - Tualatin Support, Coppermines work good at 166 MHz, Tualatins can work better at 166 MHz.
9) Rev 1.6 - 02.07.11

All revs support 2 GB of Ram (not only 1,5 GB as suggested by the chipset producer)

When it comes to HDD the maximum transfer rate is around 82,4 MB/sec (ATA UDMA100 onboard controller)
Here's how it scales with FSB:

66FSB - 78,8 MB/sec

100FSB - 81,1 MB/sec

133FSB - 81,7 MB/sec

150FSB - 82,6 MB/sec


166FSB - 82,4 MB/sec

Here's how long it takes to boot into windows on 166 FSB:
https://www.youtube.com/watch?v=SEiI4V9jP1g - Tualatin
https://www.youtube.com/watch?v=VSTXBHm6F2k - Coppermine

gabimor wrote on 2022-01-06, 22:22:

In the past, do you saw problems with this capacitors mobo ?

Those caps were of low quality just like the vast majority from that period of time 😉

JustJulião wrote on 2022-02-08, 19:36:

Hi, I'm also interested but I can't compose PM's for now, can you write me one ?

I attach everything you need.

Mazuto wrote on 2022-10-07, 22:36:

Just had to write this down here as a 635 user in pain 😒

I feel for you 🙁 I just hope you will be able to get this mobo back to life! In case you need help just PM me 😀

I would also like you to make so HQ photos of your mobo and make them public - THERE ARE NO GOOD PHOTOS IN THE WHOLE INTERNET 😉 You are the lucky owner of Jetway J-635CS 😁 Please share 😉

How to know exact date of production?

P.S. I would not confuse people with overclocking potential by production date , revision as it's alot of lottery .

Hi, yes, I read the PM - Thank you very much for that. I am still not able to write back. It seems I did not enough Postings, yet.

In the meantime I also tried different memory Sticks. Goodram, Nanya, Quimonda, OCZ...
And on my Board the first 1GB Kit that I tried, gave me the best result: 2,5-NORMAL...
This cheap Tequila M&S modules with fancy cactus Sticker:
https://www.tiger-technik.de/Arbeitsspeicher- … r672::8302.html

Maybe this is helpful for somebody.

I just watched your gameplay videos - very very impressive. Just got a hold of a ECS P6S5AT myself, it's in sorry condition (bloated caps, 2 missing, just the legs on the motherboard are left) but the PCB is not scratched, and the CPU and RAM sockets are in great shape, so maybe I'll get lucky and it will post after a wash and a recap.

Can't wait to give this bad boy a spin!

VooDooMan wrote on 2023-12-22, 19:33:

3faltigkeit wrote on 2023-12-22, 15:19:

By the way, is there maybe some progress running the p6s5at at 200 MHz FSB? I wonder If the chipset is able to handle such high frequencies. I am searching for an alternative to the TUSL2. The TUSL2 has no issues with 200 MHz FSB. But the only Graphics Card which (which I found so Far) handles 100 MHz AGP clock is the GF3 Ti200. A working faster one would be great. The 6OXET has great deviders but using these is unstable. So the P6s5at ist the only other candidate that maybe could achieve this.

Check you private messages please - you got all the answers there 😉

I'm also curious on the 200mhz progress, if you mind sharing.

I have a REV. 1.6 board and can't make it work with reference ATI 9700 Pro which is supposedly 3.3V compatible, has anyone had similar problems? the card displays image and I can install drivers (6.2) but it fails to initialize anything 3D,
ATI 9100 works fine though...

S0N1C wrote on 2024-04-05, 10:17:

I have a REV. 1.6 board and can't make it work with reference ATI 9700 Pro which is supposedly 3.3V compatible, has anyone had similar problems? the card displays image and I can install drivers (6.2) but it fails to initialize anything 3D,
ATI 9100 works fine though...

What OS youre using ? Maybe earlier driver , proper directX could solve this.

win98se, catalyst 6.2, directx 8.1

Try catalyst 2.x-4.x also dx9.0a . Or try installation CD for 9700.

the issue was resolved by removal of 512MB of 1024 installed DDR RAM...