Probably a Woodcrest...
From wiki: 64-bit processors: Intel 64 – Core microarchitecture
Woodcrest – 65 nm process technology
Server and Workstation CPU (SMP support for dual CPU system)
Introduced June 26, 2006
Dual-core
Intel VT-x, multiple OS support
EIST (Enhanced Intel SpeedStep Technology) in 5140, 5148LV, 5150, 5160
Execute Disable Bit
TXT, enhanced security hardware extensions
SSSE3 SIMD instructions
iAMT2 (Intel Active Management Technology), remotely manage computers
Variants
Xeon 5160 – 3.00 GHz (4 MB L2, 1333 MHz FSB, 80 W)
Xeon 5150 – 2.66 GHz (4 MB L2, 1333 MHz FSB, 65 W)
Xeon 5140 – 2.33 GHz (4 MB L2, 1333 MHz FSB, 65 W)
Xeon 5130 – 2.00 GHz (4 MB L2, 1333 MHz FSB, 65 W)
Xeon 5120 – 1.86 GHz (4 MB L2, 1066 MHz FSB, 65 W)
Xeon 5110 – 1.60 GHz (4 MB L2, 1066 MHz FSB, 65 W)
Xeon 5148LV – 2.33 GHz (4 MB L2, 1333 MHz FSB, 40 W) (low voltage edition)