I have a question that requires older specs knowledge, maybe. I have taken apart a old IBM desktop goverment box. It has a 133 sock 7 pro and for some reason pc 133 sd ram, whats up with that? Figured there would be simms not dimms, figured 75 mhz simms. The worst thing is that the board has a 16meg dimm, never seen before, but the board has a block at 32 megs ram. I am pretty sure. (wonder if there is a bios update for it) Ok my real question is I looked on the other side of the pro and saw a strange small board that looks like it is plugged into a pci slot but he slot is slightly bigger than a pci slot though.] The board has three chips on it, the aphanumeric is txk77v3211q-6 and um6164ds-12 and is dated 03/15/97 what is this part and what does it do? Please feel free to respond to any part of this post.

No clue on the mem. The board in the slightly bigger than PCI: daughterboard? M2 If at first you don't succeed, you're about average.

If the board you speak of has no ISA or PCI slots on it, that's likely the cache memory plugged into the motherboard. Should look like an odd size stick of memory with two chips of the same number and a third chip with a different number. About 4" x 1 1/2"? A lot of socket7 and super socket7 boards came with 168 pin sdram memory slots in addition to, or in place of 72pin slots. Can you find the exact model number of the IBM? I'm flyin' blind here and tossing guesses at you. Skip

Yea, like Skip said, it's probably old COAST cache RAM. Looks like this? http://america.hongfaith.com/Cache_RAM%20Related/coast_cache.htm Are you sure the RAM was PC133? Early 168-pin DIMMs looked the same, but they were EDO modules that ran at 5v Asus A7N8X-X 1800+ @ 9.5 x 185MHz 768MB PC2700 2.5-3-3-7 Asus A9550GE/TD 128MB WinME/WinXP Pro