Intel Xeon E3-1245 v2 socket: LGA 1155
The Intel Xeon E3-1245 v2 uses the LGA 1155 socket. It is a 77 W quad core Ivy Bridge server part with Hyper-Threading at 3.4 GHz to 3.8 GHz.
- Socket
- LGA 1155
- Launched
- May 2012
- Cores and threads
- 4 and 8
- Base power
- 77 W
- Codename
- Ivy Bridge
- Segment
- Server
- Family
- Intel Xeon E3
- Clocks
- 3.4 / 3.8 GHz
Intel Xeon E3-1245 v2 specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Ivy Bridge cores on 22 nm |
| Clocks | 3.4 GHz base, up to 3.8 GHz turbo |
| Cache | 8 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 77 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 P4000 (650 MHz to 1250 MHz) |
| Multiplier | Locked |
| Package | FCLGA1155 (37.5 × 37.5 mm) |
Motherboard and chipset compatibility
Intel Xeon E3-1245 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 E3-1245 v2 is
Intel Xeon E3-1245 v2 is a quad core Ivy Bridge server processor that Intel released in May 2012 for single socket servers with local displays. It runs at 3.4 GHz base with turbo to 3.8 GHz, with 8 MB Intel Smart Cache and Hyper-Threading for 8 threads. Power is rated at 77 W on a 22 nm process. The P4000 graphics block separates it from the graphics free 1240 v2 at the same clocks.
Graphics are Intel HD Graphics P4000 at 650 MHz to 1250 MHz. The workstation class block drives lab monitors 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.
High clocks with workstation graphics cover interactive server duty that headless Xeons cannot. Boards pair it with unbuffered ECC UDIMMs and a small SSD. The How to find your CPU socket type guide shows how to confirm the socket before ordering.
Socket and motherboard compatibility
The Xeon E3-1245 v2 fits LGA 1155 in FCLGA1155 form. C206 and C216 server boards with display outputs are the validated home for the P4000 block, since C204 designs cannot use the iGPU. Desktop 7 series boards with display outputs boot it with a current BIOS where the maker list names the SKU.
At 77 W standard server cooling applies. ECC needs a C-series board; 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.
PCI Express is 16 lanes from the CPU at PCIe 3.0. The P4000 block already drives two displays, so lanes stay free for network and storage controllers.
Cooling follows the 77 W server rating with a standard heatsink and chassis airflow.
Upgrade paths
Within LGA 1155 the Xeon E3-1245 v2 already tops the graphics equipped E3 v2 range, so faster moves mean graphics free E3 parts or a platform change. Memory and storage carry over. A graphics free comparison at the same clocks is Intel Xeon E3-1240 v2 on the same socket.
A platform move means a DDR4 server generation. Keep the node for lab server duty with local displays.
Frequently asked questions
What socket does the Intel Xeon E3-1245 v2 use?
It uses LGA 1155. C206 and C216 boards with display outputs are the validated home.
What graphics does the Xeon E3-1245 v2 have?
Intel HD Graphics P4000 at 650 MHz to 1250 MHz.
What memory does the Xeon E3-1245 v2 use?
DDR3-1333 and 1600, two channels, up to 32 GB, with ECC unbuffered DIMMs.
How is the Xeon E3-1245 v2 different from the E3-1240 v2?
Clocks match at 3.4 GHz to 3.8 GHz, but the 1245 v2 adds P4000 graphics at 77 W instead of 69 W.
Sources and verification
Facts last checked against these sources on . Page last edited on .