Intel Xeon E3-1275 v5 socket: LGA 1151
The Intel Xeon E3-1275 v5 uses the LGA 1151 socket on C236 workstation boards. It is a 4 core Skylake-DT part with 8 threads from 3.6 GHz to 4.0 GHz at 80 W with HD Graphics P530.
- Socket
- LGA 1151
- Launched
- October 2015
- Cores and threads
- 4 and 8
- Base power
- 80 W
- Codename
- Skylake-DT
- Segment
- Workstation
- Family
- Intel Xeon E3
- Clocks
- 3.6 / 4.0 GHz
Intel Xeon E3-1275 v5 specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Skylake cores on 14 nm |
| Clocks | 3.6 GHz base, up to 4.0 GHz turbo |
| Cache | 8 MB Smart Cache |
| Processor base power (TDP) | 80 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4-1866 and 2133 and DDR3L ECC, two channels, up to 64 GB |
| PCI Express | PCIe 3.0, 16 lanes |
| Integrated graphics | Intel HD Graphics P530 (400 MHz to 1150 MHz) |
| ECC memory | Supported |
| Package | LGA 1151 (FCLGA1151) |
Motherboard and chipset compatibility
Intel Xeon E3-1275 v5 needs a motherboard with a LGA 1151 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| C230 series: C236 | C236 | 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 1151.
LGA 1151 at a glance
| Type | LGA, 1,151 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | August 2015 |
| Memory | DDR4 on most boards (some early boards use DDR3L). DDR4 only on the second revision |
| Cooler mounting holes | 75 × 75 mm |
What the Xeon E3-1275 v5 is
The Xeon E3-1275 v5 pairs top workstation clocks with P530 graphics on LGA 1151 for media servers. Intel set 4 cores and 8 threads at 3.6 GHz base with turbo to 4.0 GHz. Eight megabytes of Smart Cache cover encodes. Power is 80 W on 14 nm from October 2015.
High base clocks with integrated graphics suit single socket transcode nodes without discrete cards. HD Graphics P530 from 400 MHz to 1150 MHz accelerates Quick Sync jobs. Eight threads handle streams beside system services. The 80 W envelope fits tower and rack workstations.
DDR4 and DDR3L ECC over two channels to 64 GB feed the node. ECC protects media assets. Buyers pick the 1275 v5 where clocks plus P530 must meet on C236.
Socket and motherboard compatibility
The 1275 v5 fits LGA 1151 on C236 workstation boards. The socket C236 table covers this Skylake-DT codename. Consumer boards lack E3 validation. Board display outputs decide P530 connectivity.
ECC UDIMMs to 64 GB are standard. LGA 1150 never boots Skylake. Check the board list for the 80 W media stepping.
Memory, PCIe and cooling
DDR4-1866 and 2133 ECC over two channels to 64 GB suit media servers. Dual channel operation decides P530 speed. DDR3L ECC options cover reuse chassis.
PCIe 3.0 with 16 lanes from the CPU serves NICs and NVMe. Transcode nodes use P530 rather than discrete cards. A 10 GbE NIC suits stream delivery.
Cooling uses 80 W tower or rack sinks with steady airflow. Sustained 3.6 GHz all core encodes run warm. No boxed cooler ships.
Upgrade paths
On the same socket the Intel Xeon E3-1280 v5 at 3.7 GHz base above trades graphics for top clocks headless, while the Intel Xeon E3-1270 v5 at the same clocks below saves cost without an iGPU. All share C236 boards where listed.
A move to E3 v6 needs Kaby Lake-DT firmware. The 1275 v5 holds top P530 clocks in Skylake workstations.
Frequently asked questions
What socket does the Intel Xeon E3-1275 v5 use?
It uses LGA 1151 on C236 workstation boards.
How many cores does the Xeon E3-1275 v5 have?
4 cores and 8 threads at 3.6 GHz base with turbo to 4.0 GHz.
Which graphics does the Xeon E3-1275 v5 include?
Intel HD Graphics P530 from 400 MHz to 1150 MHz.
When did the Xeon E3-1275 v5 launch?
October 2015 with Skylake workstation parts.
Sources and verification
- Intel Xeon Processor E3-1275 v5 specifications (Intel)
- Intel Xeon E3-1268L v5 Specs (TechPowerUp, Skylake-DT family data)
Facts last checked against these sources on . Page last edited on .