the K6-233 is a very power hungry chip by socket 7 standards, with a 28W TDP, which is almost 3x of a pentium 100. meanwhile, the board in question doesn't even come with a heatsink for its (apparently single) regulator - these heatsinks already get quite hot even with something like a p133. it's pretty obvious putting that chip in would not be a good idea.

the boards sold around the time the K6-233 launched mostly switched to more efficient switching regulators with coils. this is visible on the GA-586HX, for instance - early versions have a linear regulator with heatsink, later versions have no heatsink and coils.

For maxing out S5 systems i would recommend PODPMT66X166 as the amperage of S5-spec. isn‘t supporting higher CPUs. Yes you can drive CPUs with more power in most cases, but the old HW will thank you and will last a long time if you stick to it.

Otherwise take a S7 board.

PC-Engineer wrote on 2024-11-23, 19:49:

For maxing out S5 systems i would recommend PODPMT66X166 as the amperage of S5-spec. isn‘t supporting higher CPUs.

Why not PODPMT60X180 with another modification for multiplier of 3?

PC-Engineer wrote on 2024-11-23, 19:49:

Otherwise take a S7 board.

Right. This is already a pretty good s.5 motherboard + P133 combo. For s.7 dual voltage MMX processor it will be better to use a real s.7 mobo.

I have used a few really old Socket 5 motherboards, like Asus P54tp4 and intel Zappa (each with date codes for many chips onboard from December 1994).
Both worked with a P200, even though they only officially support up to P120.
No need to mod the motherboard or chip. Just put a thin ata66 wire strand as a U shape in the socket holes connecting BF1 to the adjacent ground VSS hole. I don't think any socket5 vrm would struggle with a P200. Overdrive chips were always a ripoff scam on socket 5 boards.

Depending on how forgiving the BIOS of your board is, you could try an IDT Winchip2 (not 2A!) CPU instead. It's single-voltage running at VRE levels (3.45V), and even at 240MHz only draws 10.5W, so barely more than the Pentium 100 the board was designed for and less than the current P133. Note that it's quite a bit slower than an Intel Pentium clock-for-clock (particularly the FPU), but at 240MHz it will still be the fastest thing that can run within spec and power envelope of an So5 board. It also gives you MMX and 3DNow instructions, not that they add much in anything the CPU could run.

I've not had much luck running one on my So5 boards - as always, BIOS can choose to not boot up at all with an unrecognized CPU - but others have, and they're so unloved you can regularly find them for very affordable prices.

Riikcakirds wrote on 2024-11-24, 00:37:

I have used a few really old Socket 5 motherboards, like Asus P54tp4 and intel Zappa (each with date codes for many chips onboard from December 1994).
Both worked with a P200, even though they only officially support up to P120.
No need to mod the motherboard or chip. Just put a thin ata66 wire strand as a U shape in the socket holes connecting BF1 to the adjacent ground VSS hole. I don't think any socket5 vrm would struggle with a P200. Overdrive chips were always a ripoff scam on socket 5 boards.

Bear in mind that Intel and Asus were at the time the Rolls Royce of motherboard manufacturers, overengineering significantly. That you can get away with high currents on the 3.3V line on boards like that doesn't guarantee it will also work on less luxurious ones. Gigabyte certainly isn't bad either, but it's not a given.