Intel Xeon L7555 socket: LGA 1567
The Intel Xeon L7555 uses the LGA 1567 socket. It is a 95 W eight core Nehalem-EX part at 1.866 GHz with Turbo Boost to 2.533 GHz and 18 MB of L3 cache for efficient multiprocessor nodes.
- Socket
- LGA 1567
- Launched
- March 2010
- Cores and threads
- 8 and 16
- Base power
- 95 W
- Codename
- Nehalem-EX
- Segment
- Server
- Family
- Intel Xeon L
- Clocks
- 1.87 / 2.53 GHz
Intel Xeon L7555 specifications
| Cores | 8 |
|---|---|
| Threads | 16 |
| Core architecture | Nehalem-EX cores on 45 nm |
| Clocks | 1.866 GHz base, 2.533 GHz Turbo Boost |
| Cache | 18 MB L3 (shared) |
| Processor base power (TDP) | 95 W |
| Manufacturing process | 45 nm |
| Memory support | DDR3 ECC, four channels |
| PCI Express | PCIe Gen 2 from the chipset |
| Integrated graphics | None |
| Multiplier | Locked |
| Package | LGA1567 |
Motherboard and chipset compatibility
Intel Xeon L7555 needs a motherboard with a LGA 1567 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 7500 Boxboro | 7500 | 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 1567.
LGA 1567 at a glance
| Type | LGA, 1,567 contacts |
|---|---|
| Package size | n/a |
| Introduced | March 2010 |
| Memory | DDR3 ECC registered with buffering, four channels per socket |
| Cooler mounting holes | Board specific (server heatsink) |
What the Xeon L7555 is
The Intel Xeon L7555 is an eight core Nehalem-EX part from March 2010. It runs eight Beckton cores at 1.866 GHz base with Turbo Boost to 2.533 GHz, with Hyper-Threading for sixteen threads. Cache is 18 MB of shared L3 on a 45 nm process. Power is rated at 95 W.
The L prefix marks low voltage with eight cores at 95 W against 130 W on the X7550. Cache follows the task list at 18 MB; one Greek table alignment suggests 24 MB, which is noted below as unverified. QPI links scale to eight sockets.
Memory is DDR3 ECC in four channels per socket.
Socket and motherboard compatibility
The Xeon L7555 fits LGA 1567 with 1567 lands. Boxboro 7500 boards boot it natively.
The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is DDR3 ECC in four channels per socket.
QPI links scale to eight sockets, with PCIe Gen 2 from the chipset.
Cooling uses server heatsinks rated for 95 W.
Upgrade paths
On LGA 1567 the upgrade is the X7560 with 24 MB of cache on the same board. Beyond LGA 1567 a move to Sandy Bridge E7 needs a new platform.
Frequently asked questions
What socket does the Xeon L7555 use?
LGA 1567, the 1567-land package on 7500 Boxboro boards.
How many cores does the Xeon L7555 have?
Eight cores and sixteen threads at 1.866 GHz base with Turbo Boost to 2.533 GHz, with 18 MB of shared L3 cache.
What memory works with the Xeon L7555?
DDR3 ECC in four channels per socket.
Sources and verification
Facts last checked against these sources on . Page last edited on .