AMD Athlon 64 LE-1640B socket: Socket AM2
The AMD Athlon 64 LE-1640B uses the Socket AM2 socket. It is a 45 W single-core Lima business-class part at 2.7 GHz with 512 KB of L2 cache for office desktops.
- Socket
- Socket AM2
- Launched
- April 2008
- Cores and threads
- 1 and 1
- Default TDP
- 45 W
- Codename
- Lima
- Segment
- Desktop
- Family
- AMD Athlon 64
- Clocks
- 2.7 GHz
AMD Athlon 64 LE-1640B specifications
| Cores | 1 |
|---|---|
| Threads | 1 |
| Core architecture | Lima cores on 65 nm |
| Clocks | 2.7 GHz (no turbo) |
| Cache | 512 KB L2 |
| Default TDP | 45 W |
| Manufacturing process | 65 nm |
| Memory support | DDR2-667 and DDR2-800, two channels |
| PCI Express | PCIe from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked |
| Package | Socket AM2 (940 pins) |
Motherboard and chipset compatibility
AMD Athlon 64 LE-1640B needs a motherboard with a Socket AM2 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 700 series | 770, 780G | 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 Socket AM2.
Socket AM2 at a glance
| Type | PGA, 940 contacts |
|---|---|
| Package size | n/a |
| Introduced | May 2006 |
| Memory | DDR2-667 and DDR2-800, two channels |
| Cooler mounting holes | 48 × 96 mm |
What the Athlon 64 LE-1640B is
The AMD Athlon 64 LE-1640B is a business-class version of the 2.7 GHz Lima single core from April 2008. It runs one K8 core at 2.7 GHz with no turbo, so 1 core gives 1 thread. Cache is 512 KB of L2 on a 65 nm process. Power is rated at 45 W on Socket AM2.
The B suffix changes nothing architecturally. It denotes the business-class boxed part with longer availability and system-image stability guarantees, which is why corporate buyers chose it over the identical consumer LE-1640 silicon.
Socket and motherboard compatibility
The LE-1640B drops into Socket AM2 boards with DDR2 memory and needs no special chipset or BIOS beyond standard Lima support. It pairs with 700 series DDR2 boards contemporary with late AM2 parts. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is DDR2-667 and DDR2-800 in two channels.
HyperTransport at 1000 MHz links the CPU to the chipset. PCIe slots hang off the chipset.
Cooling is any 45 W rated heatsink on the 48 x 96 mm mount, with Cool'n'Quiet trimming clocks and voltage at idle.
Upgrade paths
On Socket AM2 the upgrade is the AMD Athlon 64 LE-1660 at 2.8 GHz for the fastest single core, or a Brisbane dual core such as the AMD Athlon X2 4850e for a second core at the same 45 W. Beyond AM2 a move to AM2+ or AM3 needs a new board for Phenom class parts.
Frequently asked questions
What socket does the Athlon 64 LE-1640B use?
Socket AM2, the 940-pin package on DDR2 boards.
How many cores does the Athlon 64 LE-1640B have?
One core and one thread at 2.7 GHz with 512 KB of L2 cache.
What memory works with the Athlon 64 LE-1640B?
DDR2-667 and DDR2-800 in two channels.
Sources and verification
Facts last checked against these sources on . Page last edited on .