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Best Slot 1 Motherboard?

MCollins

Member
Joined
Mar 27, 2025
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17
Location
Ohio
Hello everyone!

This might be more brand related since, really, the only two options are ATX and Micro-ATX, but in your opinion, what was the best motherboard that could support the Pentium II and III? Any particular computers, brands, or variants come to mind? I'd really love to know if anyone has any they're particularly fond of! If so, I'd love to hear about them and what they're capable of!
 
There were a number of chipsets available: 440FX, 440LX, 440BX. 440BX was the best of the three and could handle Pentium IIIs that needed 100 MHz bus. I have Intel manufactured 440FX motherboards (with a Gateway rebrand) that were very solid. There was also budget versions marked 440NX and 440ZX. Don't waste your time with them.

The following generation of Pentium III designed chipsets were a disaster. i810 was slow; i815 was okay and had AGP with some models; i820 had a choice of either RAMBUS with expensive limited memory or the memory translator hub for SDRAM that didn't work.
 
Never knew that type was called SLot-1 motherboards, had to look it up.
Also the reasons why they designed that type.
Due for testing reasons and so less fall out at production.

Have some museum parts to look at:)
Intel pentium II (80522PX266512EC SL2HE)
and a Pentium (400/512/100/2.0 S1) =>Has some molten plastic as prove that CPU Board really had some heat issues.

Also have a working DELL OPTIPLEX GX1 (Windows 2000 Professional)
With a Pentuim II Inside

At moment can not find the COMPAQ AP200, has a Pentium III SLot 1 inside according the picture .
Was a dual boot Win98/XP,hmm better start looking for it.
 

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My best:
AT -> P2B-B rev 1.02
ATX -> P3B-F, GA-BX2000+ (personally I don't like this dual bios feature)

All of them works well with Powerleap and Tualking 1.4
 
There were a number of chipsets available: 440FX, 440LX, 440BX. 440BX was the best of the three and could handle Pentium IIIs that needed 100 MHz bus. I have Intel manufactured 440FX motherboards (with a Gateway rebrand) that were very solid. There was also budget versions marked 440NX and 440ZX. Don't waste your time with them.

The following gen
Never knew that type was called SLot-1 motherboards, had to look it up.
Also the reasons why they designed that type.
Due for testing reasons and so less fall out at production.

Have some museum parts to look at:)
Intel pentium II (80522PX266512EC SL2HE)
and a Pentium (400/512/100/2.0 S1) =>Has some molten plastic as prove that CPU Board really had some heat issues.

Also have a working DELL OPTIPLEX GX1 (Windows 2000 Professional)
With a Pentuim II Inside

At moment can not find the COMPAQ AP200, has a Pentium III SLot 1 inside according the picture .
Was a dual boot Win98/XP,hmm better start looking for it.
I prefer the Supermicro server boards--dual CPUs, support for 2 floppies and 440GX with 2GB SDRAM support.

eration of Pentium III designed chipsets were a disaster. i810 was slow; i815 was okay and had AGP with some models; i820 had a choice of either RAMBUS with expensive limited memory or the memory translator hub for SDRAM that didn't work.
My best:
AT -> P2B-B rev 1.02
ATX -> P3B-F, GA-BX2000+ (personally I don't like this dual bios feature)

All of them works well with Powerleap and Tualking 1.4
Tyan made some great dual slot-1 motherboards.
Thank you all very much! You've been so helpful!
 
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