Intel Core Ultra 3 105UL socket: LGA 1851

What the Core Ultra 3 105UL is

The Core Ultra 3 105UL is an 8-core and 10-thread edge processor that Intel launched in the second quarter of 2024 for LGA socketed edge systems. Two Redwood Cove Performance-cores with 4 threads plus 4 Crestmont Efficient-cores and 2 low-power E-cores give 10 threads at 1.5 GHz P-core base and up to 4.2 GHz P-core turbo. Cache is 10 MB of Smart Cache. Processor base power is 15 W with 57 W maximum turbo and 12 W minimum assured, which suits fanless and small-fan edge boxes.

Intel Graphics with 64 execution units at up to 1800 MHz and an Intel AI Boost NPU handle edge inference near the data source. The tile design uses Intel 4 for compute with TSMC N5 graphics and N6 SoC tiles linked by Foveros. DDR5-5600 in two channels up to 96 GB feeds both CPU and GPU from board SODIMM or soldered layouts.

Signage, kiosk and light automation controllers fit here. The 8-core layout with NPU covers vision checks and voice triggers at 15 W without a discrete card. Buyers who need more parallel throughput for multi-camera analytics should take a 12-core or 14-core HL part instead, since this UL SKU prioritizes low power over peak thread count.

Socket and motherboard compatibility

The 105UL fits LGA 1851 in a 45.0 by 37.5 mm LGA package for Meteor Lake-PS edge boards. Unlike desktop Arrow Lake on the same socket with 800 series chipsets, edge support depends on the industrial board BIOS and its power delivery for 15 W UL parts. The page shows the neutral compatibility sentence because chipset support is board specific.

Board vendors such as Contec and Cincoze list LGA 1851 Mini-ITX and embedded computers for Meteor Lake-PS U-series with DDR5 SODIMM slots. A 105UL order pairs with a board whose BIOS lists the PS SKU, not with a retail Z890 desktop board. Power modes scale from 12 W minimum to 28 W maximum assured, so the board VR must cover the chosen limit.

Edge shoppers compare UL low-power parts against HL performance parts on the same socket. The 105UL sips power for enclosed cases, while the Intel Core Ultra 5 125HL 45 W part doubles cores for heavier analytics. The Socket vs chipset: what decides whether a CPU works guide explains why edge LGA support lives in board vendor lists rather than desktop chipset tables.

Memory, PCIe and cooling

DDR5-5600 in two channels up to 96 GB via SODIMM is the board-level standard for PS U-series. Unbuffered non-ECC modules are common, with ECC options on select industrial boards. Capacity planning should leave headroom for frame buffers, since integrated graphics share system RAM.

PCIe gives 20 Gen4 lanes in 3 by 4 plus 2 by 4 layouts for NVMe, networking and capture cards. Edge Mini-ITX boards wire one x16 slot plus M.2 Key M and Key E for storage and wireless. Lane splits are fixed per board, so capture plus 5G plus storage needs must be checked against the manual.

Cooling follows the 15 W base with 12 W to 28 W assured range for fanless fins or small fans. No boxed cooler ships with tray edge parts. Enclosure airflow and ambient temperature decide sustained turbo behavior more than paste choice, so vendor thermal ratings for the exact chassis matter most.

Upgrade paths

The LGA socket allows chip swaps within the board vendor support list, unlike soldered mobile BGA. A 105UL can move to a 12-core Intel Core Ultra 5 125UL UL part on the same 15 W board where the BIOS lists it. Storage and memory can also grow through SODIMM and M.2.

Beyond the UL band the move is to HL 45 W boards or newer edge platforms with stronger power delivery. A working 105UL extends with SSD and memory additions for years. For a full platform refresh, the Intel Core Ultra 7 265K desktop Arrow Lake on LGA 1851 shows the socket family but needs a different board class.