Intel Core i7-640LM socket: BGA 1288
The Intel Core i7-640LM uses BGA 1288, the 1,288-ball soldered package for Arrandale mobile processors. It is a 25 W dual core part at 2.133 GHz with Turbo Boost to 2.933 GHz, Hyper-Threading and 4 MB of L3 cache.
- Socket
- BGA 1288
- Launched
- January 2010
- Cores and threads
- 2 and 4
- Base power
- 25 W
- Codename
- Arrandale
- Segment
- Mobile (soldered)
- Family
- Intel Core i7
- Clocks
- 2.13 / 2.93 GHz
Intel Core i7-640LM specifications
| Cores | 2 |
|---|---|
| Threads | 4 |
| Core architecture | Arrandale cores on 32 nm |
| Clocks | 2.133 GHz base, 2.933 GHz Turbo Boost |
| Cache | 512 KB L2 (2 × 256 KB), 4 MB shared L3 |
| Processor base power (TDP) | 25 W |
| Manufacturing process | 32 nm CPU, 45 nm graphics |
| Memory support | DDR3-1066, two channels, up to 8 GB |
| PCI Express | PCIe 2.0 x16 from the package |
| Integrated graphics | HD Graphics (Ironlake) |
| Multiplier | Locked |
| Package | BGA-1288 (soldered) |
Motherboard compatibility
Intel Core i7-640LM needs a motherboard with a BGA 1288 socket. Chipset by chipset data for this codename is not recorded yet. See the BGA 1288 chipset list and the board maker's CPU support list.
BGA 1288 at a glance
| Type | BGA, 1,288 contacts |
|---|---|
| Package size | n/a |
| Introduced | January 2010 |
| Memory | DDR3, two channels, up to 8 GB |
| Cooler mounting holes | Not applicable (soldered) |
What the Core i7-640LM is
The Intel Core i7-640LM is a dual core Arrandale mobile processor from January 2010 for thin performance notebooks. It runs two Westmere cores at 2.133 GHz base with Turbo Boost to 2.933 GHz, with Hyper-Threading for four threads. Each core carries 256 KB of L2 cache with 4 MB of shared L3 cache. Power is rated at 25 W.
The 640LM is the fastest low voltage Arrandale i7 in this batch, pairing near 35 W clocks with a 25 W envelope. HD Graphics cover office displays. Against the 620LM it adds base and turbo speed.
Memory is DDR3-1066 in two channels up to 8 GB.
Socket and motherboard compatibility
The Core i7-640LM is soldered to the board in BGA 1288 and cannot be replaced.
Firmware must list the exact stepping. The CPU cooler compatibility by socket guide covers soldered rules, and the Intel Pentium U5600 page shows another BGA 1288 part.
Memory, PCIe and cooling
Memory is DDR3-1066 in two channels up to 8 GB.
PCIe 2.0 x16 comes from the package.
Cooling is a thin heat pipe assembly drawn for 25 W.
Upgrade paths
There is no CPU upgrade path on BGA 1288 because the chip is soldered. Keep the 640LM where low voltage operation matters.
Frequently asked questions
What socket does the Core i7-640LM use?
BGA 1288, the soldered 1,288-ball package. The chip cannot be removed.
How many cores does the Core i7-640LM have?
Two cores and four threads at 2.133 GHz base with Turbo Boost to 2.933 GHz, with 256 KB of L2 per core and 4 MB of shared L3 cache.
What memory works with the Core i7-640LM?
DDR3-1066 in two channels up to 8 GB.
Sources and verification
Facts last checked against these sources on . Page last edited on .