Quick overview from the supplier:
Fujitsu PY TX100S3P E3-1220v2/2x4GB/2x500GB HDD/DVD-RW/LFF/STANDARD PSU
S26361-K1410-V103 PY TX100S3p/LFF/Standard PSU 1
S26361-F3580-E322 Intel Xeon E3-1220v2 4C/4T 3.10 GHz 8 MB 1
S26361-F3719-E514 4GB (1x4GB) 2Rx8 DDR3-1600 U ECC 2
S26361-F3267-E2 DVD-RW supermulti 1.6" SATA 1
S26361-F3701-E500 HD SATA 6G 500GB 7.2k NO HOT PL 3.5" ECO 2
S26361-F1452-E100 region kit APAC/America/EMEA/India 1
T26139-Y3850-E10 No powercord as order option 1
