It's indeed a 430VX chipset, you can tell by the larger chip crossed by the blue CD cable in the 2nd pic: Says SB82437VX:
https://en.wikipedia.org/wiki/List_of_Intel_c … entium_chipsets

That means it would take 128 MB, but the cache will only cover 64 MB of it, so little reason to get more.

The type of RAM is simply known as PC-66 SD-RAM, but PC-100 and PC-133 are the same format, only faster and more abundant. Won't make any difference in price or performance on a Pentium system, if you're not going to tweak it.
The standard was a very long lived one, from 1996 till the dominance of DDR around 2001. So, IIRC, there were 1 GB modules around - meaning that 64 MB ones, back then already, were about as obsolete and worthless as 32 MB ones since three 64 MB ones won't get you anywhere on a Athlon Win XP system...

So, whatever you can find for cheap - 2 x 32 or one 64 should work.
Format ist DIMM with 168 pins. That was the one after the 72 pin PS/2 standard:
https://en.wikipedia.org/wiki/DIMM#SDR_168-pin_SDRAM

There used to be "compatibility lists" by motherboard manufacturers if you wanted to make sure a certain brand or model of RAM would play nice with your board. But since 32 and 64 MB DIMMs are on the floor of any hobby workshop, it's probably easier to just try the next best, most should work.
For 64 MB, any BIN above ten quid will be theft and auctions most likely will stall:
https://www.ebay.co.uk/itm/134034486517

I like that blue heatsink, although it's glued on.
Some of that OEM stuff was really neat.

Is that a regular ATX board? Pretty early for a VX chipset.
My very first own PC was a VX, but baby AT - didn't even know of ATX then. Neither did I know about the 64 MB cachable RAM limit - 32 MB already felt much like a luxury 😉

Soap wrote on 2022-04-10, 20:42:

could have swore it had 32MB back in the day but oh well.

Probably you own memory playing the trick on you that you maxed out the two slots in your mind, which would have made 32?

Wouldn't be so sure about any SDRAM working. Although I've seen reports of 64Mb chips running on VX chipsets, usually it can only handle 16Mb chips. That means max 32MB per DIMM and that DIMM needs to have 16 chips on it (not the later 4-chip versions). Two of those would do the trick to get it to 64MB.

The motherboard is an Intel OEM board, looks like the TE430VX Tiger Eye, although slightly modified for Dell (no onboard VGA...). Back then Intel was about the only ATX vendor out there - their new standard that took quite a few years to gain traction.

Yes this is SDRAM stick and yes, add another 16MB will do and great for DOS machine but if you need windows 95 on it remove the 16MB stick and install single 64MB either PC66 or PC100.

Another machine would be best for window 95 with better specs like 128MB with low end PIII.

Cheers,

dionb wrote on 2022-04-10, 21:36:

Wouldn't be so sure about any SDRAM working. Although I've seen reports of 64Mb chips running on VX chipsets, usually it can only handle 16Mb chips. That means max 32MB per DIMM and that DIMM needs to have 16 chips on it (not the later 4-chip versions). Two of those would do the trick to get it to 64MB.

The motherboard is an Intel OEM board, looks like the TE430VX Tiger Eye, although slightly modified for Dell (no onboard VGA...). Back then Intel was about the only ATX vendor out there - their new standard that took quite a few years to gain traction.

OK, then it can't hurt to go for a set of two 32 MB ones - good, as it leaves the 64 MB modules for later systems.
My solution would be to look in some dusty box with a lot of stuff and junk in it, like, RAM thingies. Bound to be a few PC-100 in there 😉

Both SDRAM and EDO RAM are possible, I used to run both at the same time in my 430TX system 'till I upgraded the memory from 64MB

I keep thinking I should throw them away as I will never use them...