Intel Xeon E5649 socket: LGA 1366
The Intel Xeon E5649 uses the LGA 1366 socket. It is an 80 W six core Westmere-EP server part at 2.53 GHz with turbo to 2.93 GHz.
- Socket
- LGA 1366
- Launched
- February 2011
- Cores and threads
- 6 and 12
- Base power
- 80 W
- Codename
- Westmere-EP
- Segment
- Server
- Family
- Intel Xeon E
- Clocks
- 2.53 / 2.93 GHz
Intel Xeon E5649 specifications
| Cores | 6 |
|---|---|
| Threads | 12 |
| Core architecture | Westmere-EP cores on 32 nm |
| Clocks | 2.53 GHz base, 2.93 GHz turbo |
| Cache | 12 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 80 W |
| Manufacturing process | 32 nm |
| Memory support | DDR3-800 to 1333, three channels, ECC supported |
| QPI links | 2 links, 5.86 GT/s |
| PCI Express | PCIe 2.0 |
| Integrated graphics | None (server part) |
| Multiplier | Locked |
| ECC memory | Supported |
| Package | FCLGA1366 |
Motherboard and chipset compatibility
Intel Xeon E5649 needs a motherboard with a LGA 1366 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 5500 and 5520 server | 5500, 5520 | Works out of the box |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 1366.
LGA 1366 at a glance
| Type | LGA, 1,366 contacts |
|---|---|
| Package size | n/a |
| Introduced | 2008 |
| Memory | DDR3 triple channel, up to 24 GB on desktop boards |
| Cooler mounting holes | 80 × 80 mm |
What the Xeon E5649 is
Intel Xeon E5649 is a six core Westmere-EP server processor that Intel released in February 2011 for single and dual socket boards. It runs at 2.53 GHz base with turbo to 2.93 GHz and includes Hyper-Threading, so 6 cores give 12 threads. Cache is 12 MB Intel Smart Cache. Power is 80 W on a 32 nm process.
Six cores at 80 W suit dense virtualization nodes. Dual socket boards hold 24 threads with this chip. Turbo lifts lightly threaded tasks toward 2.93 GHz.
There is no integrated graphics on this die. Memory runs in three DDR3 channels at up to 1333 MT/s with ECC. The chip launched in the first quarter of 2011.
Socket and motherboard compatibility
The Xeon E5649 fits LGA 1366 in FCLGA1366 form. Single and dual socket server boards with 5500 and 5520 chipsets carry it. The board BIOS must list the exact E5649 string.
QuickPath links run at 5.86 GT/s between sockets. A board that lists Xeon 56xx strings is the safe choice for dual socket builds.
Memory, PCIe and cooling
Memory support is DDR3-800 to 1333, three channels, with ECC for mission critical work. Three matched modules per socket give up to 32 GB/s bandwidth. Capacity reaches 288 GB on qualified boards.
QPI links run at 2 by 5.86 GT/s. PCIe comes from the server chipset rather than the processor.
Cooling uses 80 W server heatsinks on the 80 by 80 mm pattern. Front to back airflow suits sustained loads.
Upgrade paths
On LGA 1366 the E5649 can move to the X5650 class for higher clocks at 95 W on the same board. Memory and storage carry over where the board lists both strings. A same socket six core reference at lower power is Intel Xeon L5639.
A platform move to LGA 2011 servers needs new boards and memory in fours. Keep the E5649 board for virtualization duty.
Frequently asked questions
What socket does the Intel Xeon E5649 use?
It uses LGA 1366 on single and dual socket server boards.
Does the Xeon E5649 have Hyper-Threading?
Yes. Six cores give 12 threads.
What memory does the Xeon E5649 use?
DDR3-800 to 1333 in three channels with ECC.
Can two Xeon E5649 parts work together?
Yes, up to two CPUs over QuickPath links.
Sources and verification
- Intel Xeon Processor E5649 (Intel ARK, 6 cores, 2.53 GHz, turbo 2.93, 80W, ECC)
- Intel Xeon E5649 2.53GHz 80W Feb 2011 (PassMark, 6 cores 12 threads, LGA1366)
Facts last checked against these sources on . Page last edited on .