Intel Xeon X5667 socket: LGA 1366
The Intel Xeon X5667 uses the LGA 1366 socket. It is a 95 W quad core Westmere-EP server part at 3.066 GHz with Turbo Boost to 3.466 GHz and 12 MB of L3 cache for clock sensitive hosts.
- Socket
- LGA 1366
- Launched
- March 2010
- Cores and threads
- 4 and 8
- Base power
- 95 W
- Codename
- Westmere-EP
- Segment
- Server
- Family
- Intel Xeon X
- Clocks
- 3.07 / 3.47 GHz
Intel Xeon X5667 specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Westmere-EP cores on 32 nm |
| Clocks | 3.066 GHz base, 3.466 GHz Turbo Boost |
| Cache | 12 MB L3 (shared) |
| Processor base power (TDP) | 95 W |
| Manufacturing process | 32 nm |
| Memory support | DDR3 ECC triple channel |
| PCI Express | PCIe Gen 2 from the chipset |
| Integrated graphics | None |
| Multiplier | Locked |
| Package | LGA1366 |
Motherboard and chipset compatibility
Intel Xeon X5667 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 X5667 is
The Intel Xeon X5667 is a quad core Westmere-EP server processor from the first quarter of 2010. It runs four Westmere cores at 3.066 GHz base with Turbo Boost to 3.466 GHz, with Hyper-Threading for eight threads. Cache is 12 MB of Smart Cache on a 32 nm process. Power is rated at 95 W with 6.4 GT/s QPI.
Intel ARK confirms the high clock envelope with ECC triple channel memory to 288 GB. The X5667 suits clock sensitive databases that scale per core rather than per thread. Against the X5677 it trails on clocks at lower power.
Memory is DDR3-800, 1066 and 1333 ECC triple channel.
Socket and motherboard compatibility
The Xeon X5667 fits LGA 1366 with 1366 lands. Intel 5500 and 5520 chipset boards boot it with BIOS 45 or later.
The socket table covers Westmere-EP natively. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is DDR3 ECC triple channel per socket up to 288 GB.
Two QPI links scale to dual socket nodes, with PCIe Gen 2 from the chipset.
Cooling uses server heatsinks rated for 95 W.
Upgrade paths
On LGA 1366 the server upgrade is the X5677 with higher clocks at 130 W on the same board. Beyond LGA 1366 a move to Sandy Bridge E5 needs a new board.
Frequently asked questions
What socket does the Xeon X5667 use?
LGA 1366, the 1366-land package on 5500 and 5520 chipset boards with BIOS 45 or later.
How many cores does the Xeon X5667 have?
Four cores and eight threads at 3.066 GHz base with Turbo Boost to 3.466 GHz, with 12 MB of shared L3 cache.
What memory works with the Xeon X5667?
DDR3 ECC triple channel per socket.
Sources and verification
Facts last checked against these sources on . Page last edited on .