MMX250, that's a mystery, I'm guessing it's an overclock as the only way to get 250 is 2.5x 100 on a Super 7 or 3x 83 on a max overclock FSB of something not quite SS7.
S3 Trio64 has impressive DOS compatibility, if it's a 2chip with 2 sockets, it's really a Trio32 until you add the extra RAM, which would translate to better Win3 performance and might even help DOS performance a little if the memory is bottlenecking between screen display and system.
If you want the wavetable DB, then the Aztech is a good way to avoid the notorious SB hanging note bug

Thank you for your feedback.

Indeed, I've never heard about such processor, I always though the 233 was it, but this seems to be a 250Mhz CPU...

Just found out the sound cards are actually an AZTech Sound Galaxy NX Pro 16 and a Yamaha SW60XG.

Any use I can give to the PowerVR 3D card asides from the small number of games it's likely compatible with?

Ah, the SW60XG is a separate ISA card (midi/XG synth only), so you could run it alongside a SB and not have to worry about midi hanging note, that only applies to the SB midi out or midi daughterboard, think you'd have to link the SW60XG out to the soundcard line in and set the mixer to combine them

Thank you!

Achilles2 wrote on 2025-11-22, 15:07:

Indeed, I've never heard about such processor, I always though the 233 was it, but this seems to be a 250Mhz CPU...

You can maybe just look at it and see what's written on it?

Hi, find here a couple of photos, one from CPU (seems a legit Intel MMX CPU) and boot screen shwoing clock speed at 250Mhz. Wondering if it's a 233Mhz O/C'ed to 250Mhz?

Identifying the board as possibly a PCCHIPS M560TG (or other M560 variant - the empty position matches a M560 V4.x) from the BIOS string, it's a not quite super 7 with up to 83.3MHz clock, so 250 is 83.3 x 3, the CPU is therefore a 66 x 3, a 200MMX - nice overclock if it holds together, and I guess it was set with some determination, as it's jumpers, not a BIOS option - https://theretroweb.com/motherboards/s/pcchips-m560-v4.x - could be it?
Also if pushing 83.3MHz, PC100 SDRAM would be preferable to PC66

S3 Trio has better compatibility and probably faster then the STB Lightspeed 128 which is basically a Tseng Labs ET6000.
PowerVR would only be worth it if you were wanting to play PowerVR games.

You can check each cards compatibility here
https://gona.mactar.hu/DOS_TESTS/

I'd try out the Aztec first and only look to replace if you run into any incompatibility issues, pairing with the SW60XG would make for a decent setup IMHO