Intel 430TX - Manual (Page 60)

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SIMMs can be 60ns or 70ns Fast Page Mode (FPM), or Enhanced
Data Out (EDO) (BEDO & Parity are not supported). SIMMs must
be installed in pairs so that each bank (see Map of TX2)contains 64-bit
of same memory chips.
DIMM can be used as one bank. It is available for 3.3v (power level)
Unbuffered Synchronous DRAM (SDRAM) or EDO DRAM of either 8,
16, 32, 64, 128MB, to form a memory size between 8MB to 128MB.
SIMM and DIMM can be used together, but the limitations are two
banks and max memory size 128MB. 2pcs 72-pin SIMM is one bank
and 1pce DIMM is one bank too.
Bank 0 Bank 1 TOTAL
1MB * 32 SS X 8MB
1MB * 32 SS 1MB * 32 SS 16MB
1MB * 32 SS 2MB * 32 DS 24MB
1MB * 32 SS 4MB * 32 SS 40MB
1MB * 32 SS 8MB * 32 DS 72MB
2MB * 32 DS X 16MB
2MB * 32 DS 1MB * 32 SS 24MB
2MB * 32 DS 2MB * 32 DS 32MB
2MB * 32 DS 4MB * 32 SS 48MB
2MB * 32 DS 8MB * 32 DS 80MB
4MB * 32 SS X 32MB
4MB * 32 SS 1MB * 32 SS 40MB
4MB * 32 SS 2MB * 32 DS 48MB
4MB * 32 SS 4MB * 32 SS 64MB
4MB * 32 SS 8MB * 32 DS 96MB
8MB * 32 DS X 64MB
8MB * 32 DS 1MB * 32 SS 72MB
8MB * 32 DS 2MB * 32 DS 80MB
8MB * 32 DS 4MB * 32 SS 96MB
8MB * 32 DS 8MB * 32 DS 128MB
16MB * 32SS X 128MB
16MB * 32SS 16MB * 32SS 256MB