https://theretroweb.com/motherboards/?page=1& … 4&chipsetId=429

I see three similar boards on the retro web

https://theretroweb.com/motherboards/s/pcchips-m586mr

https://theretroweb.com/motherboards/s/pcchips-m586lmr

https://theretroweb.com/motherboards/s/matson … ms6391d-ms6391e

I remember those when they were new, it's definitely a PC Chips turd. I don’t know if it was common elsewhere but the main seller of PC Chips boards in my town insisted they were “Houston” brand not PC Chips. Perhaps to distance themselves from the bad reputation of PC Chips aka PC Shits.

I would think the M586LMR since you have the LAN pins.

https://www.amazon.com/PCCHIPS-Form-Factor-Ca … d/dp/B004IJ82XQ

https://www.amazon.com/PCChips-Audio-Network- … r/dp/B004IJ2Q56

I think these may be the cables for it.

Note part numbers

B004IJ2Q56

B004IJ82XQ

Sphere478 wrote on 2025-04-17, 15:20:

https://www.amazon.com/PCCHIPS-Form-Factor-Ca … d/dp/B004IJ82XQ […]
Show full quote

https://www.amazon.com/PCCHIPS-Form-Factor-Ca … d/dp/B004IJ82XQ

https://www.amazon.com/PCChips-Audio-Network- … r/dp/B004IJ2Q56

I think these may be the cables for it.

Note part numbers

B004IJ2Q56

B004IJ82XQ

From memory those parts definitely look right but it's been ages since I've been hands on with any of that hardware.

I think basically ALL PC Chips AT boards (that have ATX power connectors) will work with the PS2/USB header, the rest may be unique to certain models.

I had one with an IBM specific bios string oddly and never could get it stable, don’t know if it was ram, cap or psu related but nothing I did help.

Performance for an all in one was good when it worked, I had mine with a Cyrix pr466

Sphere478 wrote on 2025-04-17, 04:24:

This one has the AGP port...

Are you sure? I think scrap computing just did a video about this board.

Not AGP. ADD slot.

Looks like the matsonic board due to the SiS 950

https://theretroweb.com/motherboards/s/matson … ms6391d-ms6391e
http://www.yjfy.com/M/Matsonic/mainboard/MS6391D_E.htm
https://www.vogonswiki.com/index.php/Socket_7 … therboard_Lists

nickles rust wrote on 2025-04-17, 21:07:

Sphere478 wrote on 2025-04-17, 04:24:

This one has the AGP port...

Are you sure? I think scrap computing just did a video about this board.

In the middle of OP I found out that at the very least, the slot is not in the correct location. Decent chance of being electrically incompatible.

Which raises the question, were there any of those three chipsets that ever had a motherboard with a functional AGP port?

More discussion off forum has led to some information that the add in cards for 815 chipsets likely aren’t the same, something about the memory being for a different purpose. Though maybe that isn’t 100%

One thing is clear, if slot is moved, that’s a red flag 🚩 that there is probably a very important electrical incompatibility.

Does anyone have any idea where I could find one of these cards?

The prev owner btw said they tried a bios from a
Leadtek Winfast motherboard that used the Sis 540, but that board used a different clock gen chip so while the BIOS worked, the FSB settings were way off.

They also mention that they found and un hid some bios settings using AMIBCP but the settings didn’t seem to have any effect possibly not working. It’s pretty clear I’m going to have to pick Jan’s brain on this one.

I’ve been pondering what GFX I will use for this.

I’m thinking the usual non Super, socket 7 cards are likely the go tos. Like gf2 and radeon 7500 and 9200/9250 a 5500 voodoo would be fun.

I kind of really want to get a radeon 9800 working on a agp adapter through pci though. haha, perhaps a full ATX mounted one connected to the bottom pci.

Is anyone selling a pci to AGP adapter these days on Vogons?

Interesting, but the 3D 99 score and the speed test memory score are both well below what I can achieve with my Asus TXp4 with its 83 MHz FSB.

Sphere478 wrote on 2025-04-18, 00:47:

They also mention that they found and un hid some bios settings using AMIBCP but the settings didn’t seem to have any effect possibly not working.

I can confirm. There are tons of hidden/locked settings in this AMI BIOS (PCChips M586LMR, right?). As I don't know in which particular ones you have interest to be unlocked, you can use AMIBCP ver.7.00B12 (or possibly ver. 7.60.04) to edit the BIOS for yourself.

I had K6-2 PC with this (or very similar) motherboard.... maybe 20 years ago. From what I remember, it was horrible experience. Much slower than any other Socket 7 board, terrible onboard video which in theory should support 3D acceleration but I couldn't get it to run single 3D game. And the "AGP like" slot really isn't compatible with regular AGP cards. I remember trying to insert Riva TNT2 or something similar and it shorted the whole PC 😁

havli wrote on 2025-04-18, 07:35:

I had K6-2 PC with this (or very similar) motherboard.... maybe 20 years ago. From what I remember, it was horrible experience. Much slower than any other Socket 7 board,

Sounds about right for PC Shits.

Greetings, dear members of PC Chip haters club 😁 Your unjustified "pc sh*ts" bullsh*ittin' was disproved again in YT-video by the guy with the insistent soldering without a solder flux (I can't remember his nickname in this forum): https://www.youtube.com/watch?v=_hemUMLIhWw

Actually this motherboard is pretty good AIO solution for its time with the highly integrated SiS 540 chipset.

Sphere478, I'm attaching the latest PC Chips M586LMR AMI BIOS (010514S) from TRW site with almost all of its settings unlocked. I think I left locked only some meaningless or useless settings like the option for IR device connector. If you have an (E)EPROM programmer (I bet you have), you can give it a try. Don't thank me, if it works, and don't curse me, if it does not 😁

analog_programmer wrote on 2025-04-18, 18:19:

Greetings, dear members of PC Chip haters club :D Your unjustified "pc sh*ts" bullsh*ittin' was disproved again in YT-video by t […]
Show full quote

Greetings, dear members of PC Chip haters club 😁 Your unjustified "pc sh*ts" bullsh*ittin' was disproved again in YT-video by the guy with the insistent soldering without a solder flux (I can't remember his nickname in this forum): https://www.youtube.com/watch?v=_hemUMLIhWw

Actually this motherboard is pretty good AIO solution for its time with the highly integrated SiS 540 chipset.

Sphere478, I'm attaching the latest PC Chips M586LMR AMI BIOS (010514S) from TRW site with almost all of its settings unlocked. I think I left locked only some meaningless or useless settings like the option for IR device connector. If you have an (E)EPROM programmer (I bet you have), you can give it a try. Don't thank me, if it works, and don't curse me, if it does not 😁

The attachment 010514s_M.zip is no longer available

I think they fully earned that name in the 486 fake cache days.

havli wrote on 2025-04-18, 07:35:

I had K6-2 PC with this (or very similar) motherboard.... maybe 20 years ago. From what I remember, it was horrible experience. Much slower than any other Socket 7 board, terrible onboard video which in theory should support 3D acceleration but I couldn't get it to run single 3D game. And the "AGP like" slot really isn't compatible with regular AGP cards. I remember trying to insert Riva TNT2 or something similar and it shorted the whole PC 😁

Yikes. Lol did the board survive? Just a psu shut down event, or was the magic smoke released?

I think it survived, no magic smoke 😀

havli wrote on 2025-04-20, 10:12:

I think it survived, no magic smoke 😀

Thank goodness.

So did any of these 133mhz socket 7s ever have a functional AGP? Is there a mobo model to look for?

Sphere478 wrote on 2025-04-21, 05:55:

havli wrote on 2025-04-20, 10:12:

I think it survived, no magic smoke 😀

Thank goodness.

So did any of these 133mhz socket 7s ever have a functional AGP? Is there a mobo model to look for?

The super late chipsets only seemed to be sold as low cost all in one solutions with video on board, it was rare for a AIO to offer an agp slot exception being the m810lmr (sis730)Athlon but even in that case video card support was horrible.

My view is that the late super 7 chipsets were sort of a fail down situation, they released buggy and never got to the point in sales volumes that mainstream board makers actually worked to make a high end version board using the newer chipsets.

Strangely I’ve found claims from 3rd parties that they couldn’t keep sis 540 boards on the shelf but yet having been actively buying back then finding a sis 540 boards for sale was rare, not sure if they just all RMA’d or if it was a small regional hit somewhere. I actively tried buying one from the release date onward but ended up with sis 530 and m571 motherboards instead because they were extremely cheap and common.

Had a similar experience with the sis 740, better board but never stock.