Intel Core Ultra 7 155UL socket: LGA 1851

What the Core Ultra 7 155UL is

The Core Ultra 7 155UL is a 12-core and 14-thread edge processor that Intel launched in the second quarter of 2024 for efficient 7-series edge nodes. Two Performance-cores with 4 threads plus 8 Efficient-cores and 2 low-power E-cores run at 1.7 GHz base and up to 4.8 GHz boost. Cache is 12 MB of Smart Cache. The 15 W base preserves fanless possibilities while the 7-series badge brings higher turbo than 5-series UL parts.

Graphics with Arc-class units and AI Boost NPU cover smart kiosk and gateway inference at low power. Meeting-room transcription, shelf monitoring and entry vision inspection all run from shared DDR5 without add-on cards. The low-power island keeps overnight draw minimal for always-on retail use.

Buyers who want 7-series turbo in sealed boxes fit here. The 4.8 GHz peak beats 5-series UL on single-threaded UI work. Sustained multi-core jobs that need 45 W should move to HL such as the Intel Core Ultra 7 155HL, since UL power limits long all-core runs.

Socket and motherboard compatibility

The 155UL fits LGA 1851 PS low-power boards with 15 W delivery. Desktop 800 series support for Arrow Lake is a separate branch, so industrial PS lists decide compatibility. The neutral sentence covers the vendor-specific case.

Low-power Mini-ITX PS boards pair this SKU with DDR5 SODIMM and M.2 for compact gateways. Assured power spans 12 W to 28 W around the 15 W base. BIOS must include the 155UL ID, which retail desktop BIOS files lack.

UL 7-series buyers compare the 155UL against the 165UL on 0.1 GHz turbo. The gap is small in bursts and invisible in idle. The Socket vs chipset: what decides whether a CPU works guide explains the edge vendor list model.

Memory, PCIe and cooling

DDR5-5600 up to 96 GB in two channels via SODIMM is the PS UL memory map. Shared graphics and NPU use part of the pool, so 16 GB to 32 GB is the practical floor for 7-series edge with vision. Industrial modules widen temperature range for harsh sites.

PCIe Gen4 x20 gives NVMe, LAN and capture options in compact boards. One x16 slot plus M.2 storage and Key E wireless is the common Mini-ITX layout. Fixed splits require manual checks for dual-add-on designs.

Cooling is 15 W class with fanless fins or small fans. No retail cooler ships with edge tray supply. Sealed 60 C operation depends on the validated heatsink and chassis, not on generic desktop cooler ratings.

Upgrade paths

LGA allows UL-to-UL steps where listed, such as to the Intel Core Ultra 7 165UL for 0.1 GHz more turbo. SODIMM and NVMe can also grow. Firmware for the target SKU must be present first.

The larger leap is to 45 W HL boards for sustained throughput. A working 155UL lasts years with storage care. Desktop LGA 1851 parts share the socket name but need a different board class.