Intel Core 2 Duo T7800 socket: Socket P
The Intel Core 2 Duo T7800 uses the Socket P socket. It is a 35 W dual-core Merom mobile part at 2.6 GHz with 4 MB of shared L2 cache for top performance notebooks.
- Socket
- Socket P
- Launched
- September 2007
- Cores and threads
- 2 and 2
- Base power
- 35 W
- Codename
- Merom
- Segment
- Mobile (socketed)
- Family
- Intel Core 2 Duo
- Clocks
- 2.6 GHz
Intel Core 2 Duo T7800 specifications
| Cores | 2 |
|---|---|
| Threads | 2 |
| Core architecture | Merom cores on 65 nm |
| Clocks | 2.6 GHz (no turbo) |
| Cache | 4 MB shared L2 |
| Processor base power (TDP) | 35 W |
| Manufacturing process | 65 nm |
| Memory support | DDR2 through the board chipset |
| Front side bus | 800 MT/s |
| PCI Express | PCIe from the board chipset |
| Integrated graphics | None (board graphics where fitted) |
| Multiplier | Locked |
| Package | Socket P (478-pin) |
Motherboard and chipset compatibility
Intel Core 2 Duo T7800 needs a motherboard with a Socket P socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| Montevina (4 series mobile) | GM45, PM45 | Needs a BIOS update |
| Santa Rosa (965) | GM965, PM965 | 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 P.
Socket P at a glance
| Type | PGA, 478 contacts |
|---|---|
| Package size | 35 × 35 mm |
| Introduced | May 2007 |
| Memory | DDR2 or DDR3, depending on the chipset, two channels |
| Cooler mounting holes | Board specific (laptop heatsink) |
What the Core 2 Duo T7800 is
The Intel Core 2 Duo T7800 is a 2.6 GHz mobile dual core from September 2007. It runs two Merom cores at 2.6 GHz with no turbo, so 2 cores give 2 threads. Cache is 4 MB of shared L2 on a 65 nm process. Power is rated at 35 W on Socket P.
The T7800 closed the Merom Socket P line on an 800 MT/s bus in G0 stepping with a 13x multiplier at about 530 dollars launch price. It exists because Intel pushed the 65 nm mobile clock as far as the 35 W envelope allowed before 45 nm Penryn arrived.
Socket and motherboard compatibility
The T7800 fits Socket P notebooks with DDR2 memory and a BIOS that lists late 2007 Merom parts, such as Santa Rosa GM965 and PM965 boards. It does not fit Socket M boards despite the shared 478 pins. Display comes from the notebook board graphics. 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.
An 800 MT/s front side bus ties the CPU to the mobile chipset. PCIe slots and board graphics hang off the chipset.
Cooling is the notebook vendor heat pipe assembly for the exact chassis, with Enhanced SpeedStep trimming clocks and voltage on battery.
Upgrade paths
On Socket P the upgrade is Penryn such as the Intel Core 2 Duo T9300 at 2.5 GHz with 6 MB of cache on Montevina boards, or the Intel Core 2 Duo T7700 at 2.4 GHz for a lower cost Merom. Beyond Socket P a move to a newer platform needs a new board. A swap must stay within the thermal design the chassis was qualified for.
Frequently asked questions
What socket does the Core 2 Duo T7800 use?
Socket P, on Santa Rosa boards with a Merom-aware BIOS.
How many cores does the Core 2 Duo T7800 have?
Two cores and 2 threads at 2.6 GHz with 4 MB of shared L2 cache.
What memory works with the Core 2 Duo T7800?
DDR2 through the board chipset in two channels.
Sources and verification
Facts last checked against these sources on . Page last edited on .