Intel Core i5-2400S socket: LGA 1155
The Intel Core i5-2400S uses the LGA 1155 socket. It is a 65 W quad core Sandy Bridge desktop part at 2.5 GHz with turbo to 3.3 GHz.
- Socket
- LGA 1155
- Launched
- January 2011
- Cores and threads
- 4 and 4
- Base power
- 65 W
- Codename
- Sandy Bridge
- Segment
- Desktop
- Family
- Intel Core i5
- Clocks
- 2.5 / 3.3 GHz
Intel Core i5-2400S specifications
| Cores | 4 |
|---|---|
| Threads | 4 |
| Core architecture | Sandy Bridge cores on 32 nm |
| Clocks | 2.5 GHz base, 3.3 GHz turbo |
| Cache | 6 MB Intel Smart Cache (L3) |
| Processor base power (TDP) | 65 W |
| Manufacturing process | 32 nm |
| Memory support | DDR3-1066 and 1333, two channels, up to 32 GB |
| PCI Express | 16 lanes from the CPU, PCIe 2.0 |
| Integrated graphics | Intel HD Graphics 2000 (850 MHz to 1100 MHz) |
| Multiplier | Locked |
| Package | FCLGA1155 (37.5 × 37.5 mm) |
Motherboard and chipset compatibility
Intel Core i5-2400S needs a motherboard with a LGA 1155 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 7 series | Z77, Z75, H77, B75, Q77, Q75 | Works out of the box |
| 6 series: H61, H67, P67, Z68 | Z68, P67, H67, H61 | Works out of the box |
| 6 series business: B65, Q65, Q67 | Q67, Q65, B65 | 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 1155.
LGA 1155 at a glance
| Type | LGA, 1,155 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | January 2011 |
| Memory | DDR3 |
| Cooler mounting holes | 75 × 75 mm |
What the Core i5-2400S is
Intel Core i5-2400S is a quad core Sandy Bridge desktop processor that Intel released in January 2011 for power capped towers. It runs at 2.5 GHz base with turbo to 3.3 GHz and has no Hyper-Threading, so 4 cores give 4 threads. Cache is 6 MB Intel Smart Cache. Power is 65 W on a 32 nm process with 1,160 million transistors.
The S suffix marks the 65 W class. Base clocks sit 600 MHz below the standard i5-2400 while turbo still reaches 3.3 GHz. Small offices chose it for quiet builds with slim coolers.
Graphics are Intel HD Graphics 2000 at 850 MHz to 1100 MHz. The block covers office monitors at native resolution. The memory controller takes DDR3 in two channels.
Socket and motherboard compatibility
The Core i5-2400S fits LGA 1155 in FCLGA1155 form. Both 6 series and 7 series boards boot Sandy Bridge directly, so H61, B75 and H77 all work. No update is needed for Sandy parts.
At 65 W the chip suits compact towers that cannot cool a 95 W quad. Board display outputs decide how the graphics block is used. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory support is DDR3-1066 and 1333, two channels, up to 32 GB. Intel lists 21 GB/s bandwidth with DDR3-1333. ECC is not supported.
PCI Express is 16 lanes from the CPU at PCIe 2.0. Most 2400S builds stay on integrated graphics for office monitors.
Cooling follows the 65 W desktop pattern with a standard heatsink on 75 × 75 mm spacing. Slim fans stay quiet at 65 W.
Upgrade paths
On LGA 1155 the 2400S can move to the standard i5-2400 for more base clocks on the same board, or to an i7-2600 for Hyper-Threading. Memory and storage carry over. A same socket 95 W comparison is Intel Core i5-2310.
A platform move to DDR4 boards such as LGA 1200 needs a new board and RAM. Keep the 2400S box for office duty.
Frequently asked questions
What socket does the Intel Core i5-2400S use?
It uses LGA 1155. Both 6 series and 7 series boards boot it directly.
How is the Core i5-2400S different from the i5-2400?
The 2400S is a 65 W part at 2.5 GHz base. The 2400 is a 95 W part at 3.1 GHz base.
What memory does the Core i5-2400S use?
DDR3-1066 and 1333, two channels, up to 32 GB.
Does the Core i5-2400S have Hyper-Threading?
No. Four cores give 4 threads.
Sources and verification
- Intel Core i5-2400S Processor (Intel ARK, 2.5 GHz, turbo 3.3 GHz, 65 W, HD2000 850 to 1100)
- Intel Core i5-2400S Specs (TechPowerUp, 2.5 GHz, turbo 3.3 GHz, 65 W, Jan 2011)
Facts last checked against these sources on . Page last edited on .