Intel Core 2 Duo E6400 socket: LGA 775
The Intel Core 2 Duo E6400 uses the LGA 775 socket. It is a 65 W dual-core Conroe desktop part at 2.133 GHz with 2 MB of shared L2 cache for mainstream towers.
- Socket
- LGA 775
- Launched
- July 2006
- Cores and threads
- 2 and 2
- Base power
- 65 W
- Codename
- Conroe
- Segment
- Desktop
- Family
- Intel Core 2 Duo
- Clocks
- 2.13 GHz
Intel Core 2 Duo E6400 specifications
| Cores | 2 |
|---|---|
| Threads | 2 |
| Core architecture | Conroe cores on 65 nm |
| Clocks | 2.133 GHz (no turbo) |
| Cache | 2 MB shared L2 |
| Processor base power (TDP) | 65 W |
| Manufacturing process | 65 nm |
| Memory support | DDR2 through the board chipset |
| Front side bus | 1066 MT/s |
| PCI Express | PCIe from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked |
| Package | LGA 775 |
Motherboard compatibility
Intel Core 2 Duo E6400 needs a motherboard with a LGA 775 socket. Chipset by chipset data for this codename is not recorded yet. See the LGA 775 chipset list and the board maker's CPU support list.
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 Core 2 Duo E6400 is
The Intel Core 2 Duo E6400 is a 2.133 GHz dual-core desktop processor from July 2006. It runs two Core cores at 2.133 GHz with no turbo, so 2 cores give 2 threads. Cache is 2 MB of shared L2 on a 65 nm process. Power is rated at 65 W on LGA 775.
The E6400 served the middle Conroe 2 MB line on a 1066 MT/s bus with an 8x multiplier at about 224 dollars launch price. It exists because buyers wanted 2.133 GHz Core 2 throughput without paying for the 4 MB cache of the E6420.
Socket and motherboard compatibility
The E6400 drops into LGA 775 boards with DDR2 memory and a BIOS that lists mid 2006 Conroe parts, such as 965 and P35 boards. It pairs with mainstream chipsets contemporary with Conroe. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is DDR2 through the board chipset in two channels.
A 1066 MT/s front side bus ties the CPU to the chipset. PCIe slots hang off the chipset.
Cooling is any 65 W rated LGA 775 heatsink on the 72 mm mount, with Enhanced SpeedStep trimming draw at idle.
Upgrade paths
On LGA 775 the upgrade is the Intel Core 2 Duo E6420 at 2.133 GHz with 4 MB of cache in the same 65 W class, or the Intel Core 2 Duo E6300 at 1.867 GHz for a lower cost. Beyond LGA 775 a move to a newer platform needs a new board and memory.
Frequently asked questions
What socket does the Core 2 Duo E6400 use?
LGA 775, on DDR2 boards with a Conroe-aware BIOS.
How many cores does the Core 2 Duo E6400 have?
Two cores and 2 threads at 2.133 GHz with 2 MB of shared L2 cache.
What memory works with the Core 2 Duo E6400?
DDR2 through the board chipset in two channels.
Sources and verification
Facts last checked against these sources on . Page last edited on .