Intel Xeon X5647 socket: LGA 1366
The Intel Xeon X5647 uses the LGA 1366 socket. It is a 130 W quad core Westmere-EP server part at 2.93 GHz with turbo to 3.2 GHz.
- Socket
- LGA 1366
- Launched
- February 2011
- Cores and threads
- 4 and 8
- Base power
- 130 W
- Codename
- Westmere-EP
- Segment
- Server
- Family
- Intel Xeon X
- Clocks
- 2.93 / 3.2 GHz
Intel Xeon X5647 specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Westmere-EP cores on 32 nm |
| Clocks | 2.93 GHz base, 3.2 GHz turbo |
| Cache | 12 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 130 W |
| Manufacturing process | 32 nm |
| Memory support | DDR3-1066, 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 X5647 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 X5647 is
Intel Xeon X5647 is a quad core Westmere-EP server processor that Intel released in February 2011 for single and dual socket boards. It runs at 2.933 GHz base with turbo to 3.2 GHz and includes Hyper-Threading, so 4 cores give 8 threads. Cache is 12 MB Intel Smart Cache. Power is 130 W on a 32 nm process.
High fixed clocks suit lightly threaded server tasks at 130 W. Dual socket boards hold 16 threads with this chip. The X prefix marks high power for speed over efficiency.
There is no integrated graphics on this die. Memory runs in three DDR3 channels at 1066 MT/s with ECC. System builders shipped it in performance racks.
Socket and motherboard compatibility
The Xeon X5647 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 X5647 string.
QuickPath links run at 5.86 GT/s between sockets. A board that lists Xeon 56xx strings is the safe choice.
Memory, PCIe and cooling
Memory support is DDR3-1066, three channels, with ECC for mission critical work. Three matched modules per socket give the rated bandwidth. Capacity follows the board design.
QPI links run at 2 by 5.86 GT/s. PCIe comes from the server chipset rather than the processor.
Cooling needs a 130 W rated server heatsink on the 80 by 80 mm pattern. Strong front to back airflow suits the high power envelope.
Upgrade paths
On LGA 1366 the X5647 can move to the X5672 for higher clocks at lower power on the same board. Memory and storage carry over where the board lists both strings. A same socket high clock reference is the X5687 class.
A platform move to LGA 2011 servers needs new boards and memory in fours. Keep the X5647 board for fast single thread duty.
Frequently asked questions
What socket does the Intel Xeon X5647 use?
It uses LGA 1366 on single and dual socket server boards.
Does the Xeon X5647 have Hyper-Threading?
Yes. Four cores give 8 threads.
What memory does the Xeon X5647 use?
DDR3-1066 in three channels with ECC.
How is the Xeon X5647 different from the X5672?
The X5647 runs at 2.93 GHz base. The X5672 runs at 3.2 GHz base at 95 W.
Sources and verification
- Intel Xeon X5647 2.933 GHz turbo 3.2 GHz (CpuTronic, 4 cores 8 threads, 130W)
- X5647 2.93 GHz turbo bins Feb 2011 (Simple Xeon list, 12MB, 130W, LGA1366)
Facts last checked against these sources on . Page last edited on .