Intel Pentium E5400 socket: LGA 775
The Intel Pentium E5400 uses the LGA 775 socket. It is a 65 W dual core Wolfdale desktop part at 2.7 GHz with 2 MB of L2 cache.
- Socket
- LGA 775
- Launched
- January 18, 2009
- Cores and threads
- 2 and 2
- Base power
- 65 W
- Codename
- Wolfdale
- Segment
- Desktop
- Family
- Intel Pentium
- Clocks
- 2.7 GHz
Intel Pentium E5400 specifications
| Cores | 2 |
|---|---|
| Threads | 2 |
| Core architecture | Wolfdale cores on 45 nm |
| Clock | 2.7 GHz (no turbo) |
| Front side bus | 800 MT/s |
| Cache | 2 MB L2 (shared) |
| Thermal design power | 65 W |
| Manufacturing process | 45 nm |
| Memory support | DDR1, DDR2 or DDR3, two channels (board dependent) |
| PCI Express | PCIe Gen 2 from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked |
| Package | LGA775 (FC-LGA6) |
Motherboard and chipset compatibility
Intel Pentium E5400 needs a motherboard with a LGA 775 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| Intel 4 series | X48, P45, G45, G41 | Works out of the box |
| Intel 3 series | X38, P35, G33, G31 | Needs a BIOS update 45 nm Wolfdale parts boot on 3 series boards that list them, after a BIOS update. |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 775.
LGA 775 at a glance
| Type | LGA, 775 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | 2004 |
| Memory | DDR, DDR2 or DDR3, depending on the motherboard chipset |
| Cooler mounting holes | 72 × 72 mm |
What the Pentium E5400 is
The Intel Pentium E5400 is a dual core Wolfdale desktop processor that Intel launched on January 18, 2009 at 2.7 GHz. It runs two cores at 2.7 GHz with no turbo, so 2 cores give 2 threads. The pair shares 2 MB of L2 cache on a 45 nm process with 228 million transistors. Power is rated at 65 W with an 800 MT/s front side bus and the SLB9V and SLGTK sSpecs.
The E5400 adds 200 MHz over the E5300 at the same 65 W. CPU-World release data places it in January 2009 against AMD Athlon II duals at PassMark parity. Early SLB9V parts lack VT-x while SLGTK adds it, so check the sSpec for virtualization.
There is no graphics on the CPU. Display comes from the board chipset or a discrete card.
Socket and motherboard compatibility
The Pentium E5400 fits LGA 775 with 775 lands. Intel 4 series boards boot Wolfdale natively, while 3 series boards need a listed BIOS.
The Socket vs chipset: what decides whether a CPU works guide covers pairing rules, and the Intel Core 2 Quad Q6600 page shows a quad on the same socket.
Memory, PCIe and cooling
Memory is DDR1, DDR2 or DDR3 in two channels depending on the board chipset.
The 800 MT/s front side bus links the CPU to the chipset. PCIe Gen 2 slots hang off the chipset.
Cooling is the stock 65 W LGA 775 sink on the 72 × 72 mm pattern.
Upgrade paths
On LGA 775 the upgrade is the E5500 or E5800 on the same board. Beyond LGA 775 a move to LGA 1156 needs a new board.
Frequently asked questions
What socket does the Pentium E5400 use?
LGA 775, the 775-land package. Intel 4 series boards boot it natively, 3 series after a BIOS update.
How many cores does the Pentium E5400 have?
Two cores and two threads at 2.7 GHz with 2 MB of shared L2 cache.
What memory works with the Pentium E5400?
DDR1, DDR2 or DDR3 in two channels depending on the board chipset.
Sources and verification
Facts last checked against these sources on . Page last edited on .