Essentials
Product Collection
Legacy Intel® Xeon® Processors
Code Name
Products formerly Nehalem EP
Vertical Segment
Server
Processor Number
X5550
Status
Launched
Launch Date
Q1'09
Lithography
45 nm
Recommended Customer Price
N/A
Performance
# of Cores
4
# of Threads
8
Processor Base Frequency
2.66 GHz
Max Turbo Frequency
3.06 GHz
Cache
8 MB SmartCache
Bus Speed
6.4 GT/s QPI
# of QPI Links
2
TDP
95 W
VID Voltage Range
0.75V -1.35V
Supplemental Information
Embedded Options Available
No
Datasheet
View now
Memory Specifications
Max Memory Size (dependent on memory type)
144 GB
Memory Types
DDR3 800/1066/1333
Max # of Memory Channels
3
Max Memory Bandwidth
32 GB/s
Physical Address Extensions
40-bit
ECC Memory Supported ‡
Yes
Package Specifications
Sockets Supported
FCLGA1366
Max CPU Configuration
2
TCASE
75°C
Package Size
42.5mm x 45mm
Processing Die Size
263 mm2
# of Processing Die Transistors
731 million
Low Halogen Options Available
See MDDS
Advanced Technologies
Intel® Turbo Boost Technology ‡
1.0
Intel® Hyper-Threading Technology ‡
Yes
Intel® Virtualization Technology (VT-x) ‡
Yes
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
Yes
Intel® VT-x with Extended Page Tables (EPT) ‡
Yes
Intel® 64 ‡
Yes
Instruction Set
64-bit
Idle States
Yes
Enhanced Intel SpeedStep® Technology
Yes
Intel® Demand Based Switching
Yes