Model Base Card DIMMs FRU DIMMs Pair
6C1/6E1 09P2890 256MB 09P0550 Pair Min 512MB 512MB 09P0491 Pair Max 8GB
6C4/6E4 N/A 256MB 53P3224 Quad Min 1GB 512MB 53P3226 Quad Max 32B 1GB 53P3230 Quad (on 4-way 2GB 53P3232 Quad system)
9112-265 same a 6C1