Intel Xeon L3403 socket: LGA 1156
The Intel Xeon L3403 uses the LGA 1156 socket. It is a 30 W dual core Clarkdale server part at 2.0 GHz with 4 MB of L3 cache for efficient single socket towers.
- Socket
- LGA 1156
- Launched
- October 2010
- Cores and threads
- 2 and 2
- Base power
- 30 W
- Codename
- Clarkdale
- Segment
- Server
- Family
- Intel Xeon L
- Clocks
- 2.0 GHz
Intel Xeon L3403 specifications
| Cores | 2 |
|---|---|
| Threads | 2 |
| Core architecture | Clarkdale cores on 32 nm |
| Clocks | 2.0 GHz (no turbo) |
| Cache | 4 MB L3 (shared) |
| Processor base power (TDP) | 30 W |
| Manufacturing process | 32 nm CPU, 45 nm graphics |
| Memory support | DDR3-1066 ECC, two channels |
| PCI Express | PCIe 2.0 x16 from the package |
| Integrated graphics | HD Graphics (on package) |
| Multiplier | Locked |
| Package | LGA1156 |
Motherboard and chipset compatibility
Intel Xeon L3403 needs a motherboard with a LGA 1156 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 5 series with graphics | H55, H57, Q57 | Works out of the box |
| P55 performance | P55 | Works out of the box Onboard video ports stay dark on P55. Use a separate graphics card. |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 1156.
LGA 1156 at a glance
| Type | LGA, 1,156 contacts |
|---|---|
| Package size | n/a |
| Introduced | September 2009 |
| Memory | DDR3-1066 and 1333, two channels, up to 16 GB |
| Cooler mounting holes | 75 × 75 mm |
What the Xeon L3403 is
The Intel Xeon L3403 is a dual core Clarkdale server processor from October 2010. It runs two Westmere cores at 2.0 GHz with no turbo and no Hyper-Threading, so 2 cores give 2 threads. The pair shares 4 MB of L3 cache on a 32 nm CPU die with a 45 nm graphics die. Power is rated at 30 W on LGA 1156.
The L prefix marks low voltage for efficient single socket servers that idle most of the day. Against the L3406 at 2.266 GHz it trails on clocks and threads at the same 30 W. ECC UDIMMs work where the board wires them for server integrity.
Memory is DDR3-1066 in two channels through the on package controller.
Socket and motherboard compatibility
The Xeon L3403 fits LGA 1156 with 1156 lands. Server boards with 3400 series firmware boot Clarkdale Xeons directly. Check the vendor CPU list because desktop P55 boards rarely list L SKUs.
The socket table covers Clarkdale natively. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules, and the Intel Pentium G6950 page shows the desktop twin.
Memory, PCIe and cooling
Memory is DDR3-1066 ECC UDIMMs in two channels where boards wire them.
PCIe 2.0 x16 comes from the package for RAID and network cards.
Cooling is a 1U or tower server heatsink rated for 30 W.
Upgrade paths
On LGA 1156 the server upgrade is the L3406 with threads at the same power, or an X3400 quad on the same board. Beyond LGA 1156 a move to Sandy Bridge Xeon E3 needs a new board.
Frequently asked questions
What socket does the Xeon L3403 use?
LGA 1156, the 1156-land package on server boards with 3400 series firmware.
How many cores does the Xeon L3403 have?
Two cores and two threads at 2.0 GHz with 4 MB of shared L3 cache.
What memory works with the Xeon L3403?
DDR3-1066 ECC in two channels where boards wire it.
Sources and verification
Facts last checked against these sources on . Page last edited on .