Intel Xeon E5-2665 socket: LGA 2011
The Intel Xeon E5-2665 uses the LGA 2011 socket. It is a 115 W eight core Sandy Bridge-EP server part with 16 threads at 2.4 GHz to 3.1 GHz.
- Socket
- LGA 2011
- Launched
- March 2012
- Cores and threads
- 8 and 16
- Base power
- 115 W
- Codename
- Sandy Bridge-EP
- Segment
- Server
- Family
- Intel Xeon E5
- Clocks
- 2.4 / 3.1 GHz
Intel Xeon E5-2665 specifications
| Cores | 8 |
|---|---|
| Threads | 16 |
| Core architecture | Sandy Bridge-EP cores on 32 nm |
| Clocks | 2.4 GHz base, up to 3.1 GHz turbo |
| Cache | 20 MB |
| Processor base power (TDP) | 115 W |
| Manufacturing process | 32 nm |
| Memory support | DDR3-800 to 1600, four channels, ECC |
| PCI Express | PCIe 3.0, 40 lanes |
| Integrated graphics | None (server board graphics) |
| Multiplier | Locked |
| Package | FCLGA2011 |
Motherboard and chipset compatibility
Intel Xeon E5-2665 needs a motherboard with a LGA 2011 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| C600 series | C602 | 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 2011.
LGA 2011 at a glance
| Type | LGA, 2,011 contacts |
|---|---|
| Package size | 52.5 × 45 mm |
| Introduced | November 2011 |
| Memory | DDR3 quad channel, up to 1866 MT/s, up to 64 GB on desktop boards |
| Cooler mounting holes | 80 × 80 mm |
What the Xeon E5-2665 is
Intel Xeon E5-2665 is an eight core Sandy Bridge-EP server processor that Intel released in March 2012 for performance dual socket servers. It runs at 2.4 GHz base with turbo to 3.1 GHz, with 20 MB cache and Hyper-Threading for 16 threads. Power is rated at 115 W on a 32 nm process. Higher base than the 95 W eights suits application servers that run hot through business hours.
No integrated graphics are present. Memory spans DDR3-800 to 1600 over four channels with ECC, and the chip gives 40 PCIe 3.0 lanes plus two 8.0 GT/s QPI links. Sixteen fast threads handle databases and virtualization hosts with consistent latency.
Boards pair it with registered DIMMs and fast RAID in 2U chassis. All core work near 2.4 GHz keeps response direct under load. The How to find your CPU socket type guide shows how to confirm the socket before ordering.
Socket and motherboard compatibility
The Xeon E5-2665 fits LGA 2011 in FCLGA2011 form. Dual socket Romley boards with the C600 series controller carry it, with C602 the reference. The vendor list must carry the exact E5-2665 string.
At 115 W full size server heatsinks with strong chassis airflow apply. The Socket vs chipset: what decides whether a CPU works guide covers server rules.
Memory, PCIe and cooling
Memory support is DDR3 at 800, 1066, 1333 or 1600 MT/s, four channels, with ECC and registered DIMMs. Four populated channels per socket feed sixteen threads.
PCI Express is 40 lanes of PCIe 3.0 per socket. Two QPI links at 8.0 GT/s join pairs. NUMA placement guides I/O assignment.
Cooling is vendor qualified for 115 W. No retail mount exists, so replacements follow the chassis vendor.
Upgrade paths
Within LGA 2011 the Xeon E5-2665 can step to faster Sandy Bridge-EP or Ivy Bridge-EP eight core parts on the same board, where power and cooling allow. Memory and storage carry over. A close step up is Intel Xeon E5-2670 at higher power.
A platform move means a DDR4 generation. Keep the node for application tier duty.
Frequently asked questions
What socket does the Intel Xeon E5-2665 use?
It uses LGA 2011. C600 series dual socket boards carry it.
Does the Xeon E5-2665 have Hyper-Threading?
Yes. Eight cores give 16 threads with turbo to 3.1 GHz.
What memory does the Xeon E5-2665 use?
DDR3 at 800, 1066, 1333 or 1600 MT/s, four channels, with ECC and registered DIMMs.
Is the Xeon E5-2665 for dual socket boards?
Yes. The 2600 numbering allows two sockets.
Sources and verification
Facts last checked against these sources on . Page last edited on .