BGA 1781 socket: CPUs, chipsets and cooler fit
BGA 1781 is the Intel soldered ball grid array package for the 9 W Alder Lake-U mobile processors from February 2022. The package carries 1,781 contacts and solders directly to the laptop or tablet mainboard. Intel aimed it at thin-and-light machines where battery life matters more than sustained clocks, with processor base power at 9 W and turbo headroom to 29 W.
Quick facts
| Maker | Intel |
|---|---|
| Package type | BGA |
| Contacts | 1,781 |
| Package size | n/a |
| Introduced | February 2022 |
| Status | Legacy |
| Memory | LPDDR5 up to 5200 MT/s and LPDDR4x up to 4267 MT/s, two channels, up to 64 GB |
| PCIe from the CPU | PCIe 4.0, up to 14 lanes |
| Cooler mounting holes | Not applicable (soldered) |
| Replaces | None |
| Replaced by | None |
Overview
The package exists for one job: carrying hybrid Performance-cores and Efficient-cores with UHD or Iris Xe graphics into small bodies with LPDDR memory. Core counts span 5 cores with 5 or 6 threads on Pentium and Celeron entry parts to 10 cores with 12 threads on Core i5 and i7 SKUs. Cache follows the die size from 8 MB to 12 MB of Intel Smart Cache. Memory support stays LPDDR only, with DDR SODIMM designs left to the larger BGA 1744 package that serves the 15 W U parts.
Because the processor solders to the board there is no socket retention, no aftermarket board choice and no processor upgrade. Laptop makers design cooling around the 9 W base with headroom for 29 W turbo bursts, and buyers choose the configuration once at order time. Against BGA 1744 at 50 × 25 mm for 15 W and 28 W parts, BGA 1781 is the smaller low-power option with 14 PCIe Gen4 lanes for NVMe and board devices.
Processor generations
| Codename | Marketing name | Years | Notes |
|---|---|---|---|
| Alder Lake-U | 12th Gen Core U (9 W) | 2022 | 9 W thin-and-light processors with 5 to 10 cores, launched in February 2022 with LPDDR memory and up to 14 PCIe Gen4 lanes. |
Who BGA 1781 serves
BGA 1781 processors belong in thin-and-light laptops, school machines and small office systems where quiet operation and long battery life matter. The 9 W base with 29 W turbo headroom separates them from 15 W U designs that trade battery minutes for sustained clocks and from 28 W P designs that need larger fans.
Within the package the choice runs from the 5-core Pentium 8500 and Celeron 7300 for entry school and office duty through the 6-core Core i3-1210U to the 10-core Core i5 and i7 SKUs for responsive multitasking. Graphics scale from UHD with 48 execution units to Iris Xe with 96 units, so buyers who meet over video or edit photos should weigh the Core tiers.
Memory and PCIe
Memory support spans soldered LPDDR5 up to 5200 MT/s and LPDDR4x up to 4267 MT/s across two channels to 64 GB. There are no DDR SODIMM designs on this package, so memory size is fixed at order time and soldered density decides the ceiling. ECC is not offered on these consumer mobile parts.
PCIe arrives as Gen4 with up to 14 lanes in total for NVMe storage and board devices. Laptop designs typically wire fast Gen4 SSDs to the available lanes, which is enough for study and office loads with large documents. Boards that need discrete graphics lanes or extra slots use larger packages instead.
CPUs on BGA 1781
7 processor pages in the database, newest first.
| Processor | Cores / threads | Base / boost | TDP | Launched |
|---|---|---|---|---|
| Intel Celeron 7300 | 5 / 5 | 1.0 GHz | 9 W | Feb 2022 |
| Intel Core i3-1210U | 6 / 8 | 1.0 / 4.4 GHz | 9 W | Feb 2022 |
| Intel Core i5-1230U | 10 / 12 | 1.0 / 4.4 GHz | 9 W | Feb 2022 |
| Intel Core i5-1240U | 10 / 12 | 1.1 / 4.4 GHz | 9 W | Feb 2022 |
| Intel Core i7-1250U | 10 / 12 | 1.1 / 4.7 GHz | 9 W | Feb 2022 |
| Intel Core i7-1260U | 10 / 12 | 1.1 / 4.7 GHz | 9 W | Feb 2022 |
| Intel Pentium 8500 | 5 / 6 | 1.0 / 4.4 GHz | 9 W | Feb 2022 |
Frequently asked questions
Can a BGA 1781 processor be replaced or upgraded?
No. The processor is soldered to the board. Upgrading means replacing the board or the whole laptop, so choose core count and memory at order time.
What is the difference between BGA 1781 and BGA 1744?
BGA 1781 serves 9 W Alder Lake-U parts with LPDDR memory and 14 PCIe lanes. BGA 1744 at 50 × 25 mm serves 15 W U parts plus 28 W P and 45 W H parts with DDR and LPDDR options.
Does BGA 1781 use DDR4 or DDR5?
Neither by board slot. Designs use soldered LPDDR5 or LPDDR4x chosen by the laptop maker, fixed at order time.
Does BGA 1781 support PCIe Gen4?
Yes, up to 14 Gen4 lanes for NVMe storage and board devices. Discrete graphics lanes belong to larger packages.
Sources and verification
Facts last checked against these sources on . Page last edited on .