Intel Pentium U5400 socket: BGA 1288
The Intel Pentium U5400 uses BGA 1288, the 1,288-ball soldered package for Arrandale mobile processors. It is an 18 W dual core part at 1.2 GHz with 3 MB of L3 cache for thin notebooks.
- Socket
- BGA 1288
- Launched
- May 2010
- Cores and threads
- 2 and 2
- Base power
- 18 W
- Codename
- Arrandale
- Segment
- Mobile (soldered)
- Family
- Intel Pentium
- Clocks
- 1.2 GHz
Intel Pentium U5400 specifications
| Cores | 2 |
|---|---|
| Threads | 2 |
| Core architecture | Arrandale cores on 32 nm |
| Clocks | 1.2 GHz (no turbo) |
| Cache | 512 KB L2 (2 × 256 KB), 3 MB shared L3 |
| Processor base power (TDP) | 18 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 Pentium U5400 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 Pentium U5400 is
The Intel Pentium U5400 is a dual core Arrandale mobile processor from May 2010 for thin notebooks. It runs two Westmere cores at 1.2 GHz with no turbo and no Hyper-Threading, so 2 cores give 2 threads. Each core carries 256 KB of L2 cache with 3 MB of shared L3 cache. Power is rated at 18 W on a 32 nm CPU die with a 45 nm graphics die in one package.
The U5400 is the ultra low voltage Pentium Arrandale, matching the 18 W class of the Celeron U3xxx with a full 3 MB of L3 cache. Against the 35 W P6000 at 1.877 GHz it trails badly in speed but fits fanless leaning thin designs. HD Graphics cover office displays with two display support.
Memory is DDR3 in two channels up to 8 GB through the on package controller.
Socket and motherboard compatibility
The Pentium U5400 is soldered to the board in BGA 1288 and cannot be replaced. Notebook repair means board replacement.
Firmware must list the exact stepping with the HM55 class chipset. The CPU cooler compatibility by socket guide covers soldered rules, and the Intel Pentium U5600 page shows the 1.33 GHz sibling.
Memory, PCIe and cooling
Memory is DDR3-1066 in two channels up to 8 GB, fixed per design.
PCIe 2.0 x16 comes from the package for discrete graphics or board devices.
Cooling is a thin heat pipe assembly drawn for 18 W, shared with the chipset.
Upgrade paths
There is no CPU upgrade path on BGA 1288 because the chip is soldered. A U5600 at 1.33 GHz fits the same class where offered, otherwise a new notebook is needed.
Frequently asked questions
What socket does the Pentium U5400 use?
BGA 1288, the soldered 1,288-ball package. The chip cannot be removed.
How many cores does the Pentium U5400 have?
Two cores and two threads at 1.2 GHz with 256 KB of L2 per core and 3 MB of shared L3 cache.
What memory works with the Pentium U5400?
DDR3-1066 in two channels up to 8 GB, fixed per design.
Sources and verification
Facts last checked against these sources on . Page last edited on .