Intel Xeon E5-4655 v3 socket: LGA 2011-v3
The Intel Xeon E5-4655 v3 uses the LGA 2011-v3 socket on C612 4S boards. It is a 6 core Haswell-EP frequency part with 12 threads from 2.9 GHz to 3.2 GHz at 135 W.
- Socket
- LGA 2011-v3
- Launched
- June 2015
- Cores and threads
- 6 and 12
- Base power
- 135 W
- Codename
- Haswell-EP
- Segment
- Server
- Family
- Intel Xeon E5
- Clocks
- 2.9 / 3.2 GHz
Intel Xeon E5-4655 v3 specifications
| Cores | 6 |
|---|---|
| Threads | 12 |
| Core architecture | Haswell cores on 22 nm |
| Clocks | 2.9 GHz base, up to 3.2 GHz turbo |
| Cache | 30 MB Smart Cache |
| Processor base power (TDP) | 135 W |
| Manufacturing process | 22 nm |
| Memory support | DDR4 ECC, four channels, up to 768 GB |
| PCI Express | PCIe 3.0, 40 lanes |
| Integrated graphics | None |
| ECC memory | Supported |
| Package | FCLGA2011 (LGA 2011-v3) |
Motherboard and chipset compatibility
Intel Xeon E5-4655 v3 needs a motherboard with a LGA 2011-v3 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| C612 series | C612 | 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-v3.
LGA 2011-v3 at a glance
| Type | LGA, 2,011 contacts |
|---|---|
| Package size | 52.5 × 45 mm |
| Introduced | August 2014 |
| Memory | DDR4-2400, four channels, up to 128 GB |
| Cooler mounting holes | 80 × 80 mm |
What the Xeon E5-4655 v3 is
The Xeon E5-4655 v3 is a frequency optimized 6 core Haswell-EP part on LGA 2011-v3 for per core licensed 4S servers. Intel set 6 cores and 12 threads at 2.9 GHz base with turbo to 3.2 GHz. Thirty megabytes of Smart Cache is large for six cores. Power is 135 W on 22 nm from the second quarter of 2015.
Few fast cores suit Oracle style workloads with per core costs. High base clocks beat dense parts in single thread queries. Two QPI links tie four sockets. The large cache per core helps database buffers.
No integrated graphics exist. DDR4 ECC over four channels feeds the node. Buyers pick the 4655 v3 where six fast cores cost less in licenses than sixteen slower cores.
Socket and motherboard compatibility
The 4655 v3 fits LGA 2011-v3 on C612 4S boards with E5-4600 v3 support. Per core licensing makes board choice secondary to CPU choice. Check vendor firmware for frequency optimized SKUs.
ECC RDIMMs are required. The Socket vs chipset: what decides whether a CPU works guide covers ideas, vendor docs decide populations. LGA 2011 without v3 never works.
Memory, PCIe and cooling
DDR4 ECC over four channels to 768 GB per socket with high bandwidth per core suits databases. Fewer cores share the same channels, lifting per thread bandwidth. Populate for latency rather than capacity.
PCIe 3.0 with 40 lanes per socket serves low latency networking and storage. Frequency nodes often need fast fabrics. NUMA tuning matters for query tails.
Cooling uses 135 W server heatsinks with strong airflow. Six hot cores need cool inlets to hold 2.9 GHz. No retail cooler ships.
Upgrade paths
On the same socket the Intel Xeon E5-4627 v3 with 10 cores at 2.6 GHz to 3.2 GHz nearby trades cores for similar clocks, while the Intel Xeon E5-4610 v3 at fixed 1.7 GHz covers value. All share LGA 2011-v3 where listed.
A v4 step needs new firmware. The 4655 v3 leads per core speed in Haswell-EP 4S.
Frequently asked questions
What socket does the Intel Xeon E5-4655 v3 use?
It uses LGA 2011-v3 on C612 4S boards.
How many cores does the Xeon E5-4655 v3 have?
6 cores and 12 threads at 2.9 GHz base with turbo to 3.2 GHz.
What is the TDP of the Xeon E5-4655 v3?
135 W.
When did the Xeon E5-4655 v3 launch?
June 2015.
Sources and verification
- Intel Xeon Processor E5-4655 v3 specifications (Intel)
- Intel Xeon E5-4600 v3 Product Family Brief (Intel)
Facts last checked against these sources on . Page last edited on .