both systems in my signature run UT with out any problems if you needs specs for a box.
kv-2 | UT 11.0.1 | Dell R610 Server | Intel Xeon 2.8Ghz Quad Cores | 24Gb DDR3 ECC | 1 Intel QPort NIC | Integrated Broadcom QP | Dell Perc 4i | 6 x 73G 2.5 15k SAS raid 10 | 100mb/100mb | 30mb/30Mb