Intel Core i7-870S socket: LGA 1156
The Intel Core i7-870S uses the LGA 1156 socket. It is an 82 W quad core Lynnfield desktop part at 2.666 GHz with Turbo Boost to 3.6 GHz, Hyper-Threading and 8 MB of L3 cache.
- Socket
- LGA 1156
- Launched
- July 2010
- Cores and threads
- 4 and 8
- Base power
- 82 W
- Codename
- Lynnfield
- Segment
- Desktop
- Family
- Intel Core i7
- Clocks
- 2.67 / 3.6 GHz
Intel Core i7-870S specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Lynnfield cores on 45 nm |
| Clocks | 2.666 GHz base, 3.6 GHz Turbo Boost |
| Cache | 1 MB L2 (4 × 256 KB), 8 MB shared L3 |
| Processor base power (TDP) | 82 W |
| Manufacturing process | 45 nm |
| Memory support | DDR3-1333, two channels |
| PCI Express | PCIe 2.0 x16 from the CPU |
| Integrated graphics | None (discrete graphics) |
| Multiplier | Locked |
| Package | LGA1156 |
Motherboard and chipset compatibility
Intel Core i7-870S 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 |
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 Core i7-870S is
The Intel Core i7-870S is a quad core Lynnfield desktop processor from July 2010. It runs four Nehalem cores at 2.666 GHz base with Turbo Boost to 3.6 GHz, with Hyper-Threading for eight threads. Each core carries 256 KB of L2 cache with 8 MB of shared L3 cache. Power is rated at 82 W.
The 870S pairs near 870 clocks with low power for small towers. Against the 860S it adds base and turbo speed at the same 82 W. Against the 95 W 870 it trails slightly with lower power.
There is no graphics on Lynnfield. Display needs a discrete card.
Socket and motherboard compatibility
The Core i7-870S fits LGA 1156 with 1156 lands. P55, H55 and H57 boards boot it natively with a mid 2010 BIOS.
The Socket vs chipset: what decides whether a CPU works guide covers pairing rules, and the Intel Pentium G6950 page shows a dual core alternative.
Memory, PCIe and cooling
Memory is DDR3-1333 in two channels up to 16 GB.
PCIe 2.0 x16 comes from the CPU package.
Cooling is a tower rated for 82 W or more.
Upgrade paths
On LGA 1156 the upgrade is the 880 on the same board. Beyond LGA 1156 a move to Sandy Bridge needs a new board.
Frequently asked questions
What socket does the Core i7-870S use?
LGA 1156, the 1156-land package on 5 series boards.
How many cores does the Core i7-870S have?
Four cores and eight threads at 2.666 GHz base with Turbo Boost to 3.6 GHz, with 256 KB of L2 per core and 8 MB of shared L3 cache.
What memory works with the Core i7-870S?
DDR3-1333 in two channels.
Sources and verification
Facts last checked against these sources on . Page last edited on .