Intel Xeon E3-1265L v2 socket: LGA 1155
The Intel Xeon E3-1265L v2 uses the LGA 1155 socket. It is a 45 W quad core Ivy Bridge server part with Hyper-Threading at 2.5 GHz to 3.5 GHz.
- Socket
- LGA 1155
- Launched
- May 2012
- Cores and threads
- 4 and 8
- Base power
- 45 W
- Codename
- Ivy Bridge
- Segment
- Server
- Family
- Intel Xeon E3
- Clocks
- 2.5 / 3.5 GHz
Intel Xeon E3-1265L v2 specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Ivy Bridge cores on 22 nm |
| Clocks | 2.5 GHz base, up to 3.5 GHz turbo |
| Cache | 8 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 45 W |
| Manufacturing process | 22 nm |
| Memory support | DDR3-1333 and 1600, two channels, up to 32 GB, ECC |
| PCI Express | 16 lanes from the CPU, PCIe 3.0 |
| Integrated graphics | Intel HD Graphics 2500 (650 MHz to 1150 MHz) |
| Multiplier | Locked |
| Package | FCLGA1155 (37.5 × 37.5 mm) |
Motherboard and chipset compatibility
Intel Xeon E3-1265L v2 needs a motherboard with a LGA 1155 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 7 series | Z77, Z75, H77, B75, Q77, Q75 | Works out of the box |
| 6 series: H61, H67, P67, Z68 | Z68, P67, H67, H61 | Needs a BIOS update Needs a BIOS update from the board maker before an Ivy Bridge processor is installed. |
| 6 series business: B65, Q65, Q67 | Q67, Q65, B65 | Not supported |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 1155.
LGA 1155 at a glance
| Type | LGA, 1,155 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | January 2011 |
| Memory | DDR3 |
| Cooler mounting holes | 75 × 75 mm |
What the Xeon E3-1265L v2 is
Intel Xeon E3-1265L v2 is a quad core Ivy Bridge server processor that Intel released in May 2012 for low power single socket servers. It runs at 2.5 GHz base with turbo to 3.5 GHz, with 8 MB Intel Smart Cache and Hyper-Threading for 8 threads. Power is rated at 45 W on a 22 nm process. Graphics are Intel HD Graphics 2500 at 650 MHz to 1150 MHz per ARK, not the P4000 some lists claim.
The HD 2500 block covers local displays and video without a card. Memory is DDR3 at 1333 or 1600 MT/s in two channels with ECC unbuffered DIMMs, and the chip gives 16 PCIe 3.0 lanes. Eight threads at modest power suit virtualization and appliance hosts.
Boards pair it with unbuffered ECC UDIMMs and small storage in short depth chassis. The L suffix keeps heat low enough for dense enclosures. The LGA, PGA and BGA: CPU package types explained guide contrasts this socketed server part with soldered designs.
Socket and motherboard compatibility
The Xeon E3-1265L v2 fits LGA 1155 in FCLGA1155 form. C202, C204, C206 and C216 server boards are the validated home with ECC support. Desktop 7 series boards boot it with a current BIOS where the maker list names the SKU; pair the graphics models with a board that has display outputs, since C204 designs cannot use the iGPU.
At 45 W compact server cooling applies. ECC needs a C-series board, so use non-ECC UDIMMs on desktop boards. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory support is DDR3-1333 and 1600, two channels, up to 32 GB, with ECC unbuffered DIMMs on C-series boards. Two matched UDIMMs feed eight threads and shared graphics. Registered DIMMs are not supported on E3.
PCI Express is 16 lanes from the CPU at PCIe 3.0 for network and storage controllers. Low power servers spend lanes on Ethernet and boot SSDs.
Cooling follows the 45 W rating with a small server heatsink. No retail mount ships with tray parts.
Upgrade paths
Within LGA 1155 the Xeon E3-1265L v2 can move to faster E3-1200 v2 quad parts on the same board, where power and cooling allow. Memory and storage carry over. A higher power comparison with stronger graphics is Intel Xeon E3-1245 v2 on the same socket.
A platform move means a DDR4 server generation. Keep the node for efficient appliance duty.
Frequently asked questions
What socket does the Intel Xeon E3-1265L v2 use?
It uses LGA 1155. C200 series server boards are the validated home.
What graphics does the Xeon E3-1265L v2 have?
Intel HD Graphics 2500 at 650 MHz to 1150 MHz per ARK, not the P4000 some lists claim.
What memory does the Xeon E3-1265L v2 use?
DDR3-1333 and 1600, two channels, up to 32 GB, with ECC unbuffered DIMMs.
Is the Xeon E3-1265L v2 for single socket boards?
Yes. E3 parts are single socket only.
Sources and verification
Facts last checked against these sources on . Page last edited on .