Intel Core Ultra 7 356H socket: BGA 2540

What the Core Ultra 7 356H is

The Intel Core Ultra 7 356H is a 16-core, 16-thread mobile processor that Intel launched in January 2026 as the second Core Ultra 7 member of Core Ultra Series 3, the family codenamed Panther Lake. Its four Cougar Cove Performance-cores run at 1.9 GHz and reach up to 4.7 GHz, while eight Darkmont Efficient-cores cover parallel work at 1.5 GHz and up to 3.5 GHz and four low-power Efficient-cores handle background tasks at 1.5 GHz and up to 3.3 GHz. All sixteen cores share 18 MB of Intel Smart Cache, and with no Hyper-Threading the thread count matches the core count at sixteen.

Graphics on this chip take a deliberately smaller role than on the X models. Intel Graphics with four Xe3 cores runs at up to 2.45 GHz with 40 TOPS of Int8 throughput for everyday visuals, video playback and multi-monitor office work. A discrete NPU adds 50 TOPS for background blur, noise suppression and other on-device AI features that run without waking the CPU cores. Intel builds the compute tile on the Intel 18A process, and the chip is rated at 25 W of processor base power with up to 80 W of maximum turbo power.

The 356H is the entry route into sixteen Panther Lake cores. It keeps the full core layout, 18 MB cache, twenty PCIe lanes and dual memory support of the 366H while trimming 100 MHz from the Performance-core peak and slightly lowering graphics clocks. Laptop makers use that gap to reach lower prices for mainstream performance laptops, student machines and small business fleets.

Inside the wider family the 356H sits below the 4.8 GHz Core Ultra 7 366H and above the 12-core Core Ultra 5 range. Buyers who need maximum thread count at the lowest 16-core price land here, while buyers who can use fewer cores with stronger integrated graphics look to the 12-core Core Ultra 5 338H with its ten-core Arc GPU instead.

Socket and motherboard compatibility

The Core Ultra 7 356H is soldered to its board in the BGA 2540 ball grid array, so there is no socket to plug into and the chip cannot be replaced or upgraded later. The 2,540-ball joint is made once at the factory on a 50 × 25 mm FCBGA2540 package, and each laptop or compact board design is qualified around this exact SKU for its whole service life.

There is no board or chipset choice in the retail sense. The system vendor selects the memory type and capacity, sets the power policy between the 15 W minimum assured power and the 80 W turbo ceiling, and validates the thermal design for that envelope. Firmware, drivers and the NPU software stack come from the same vendor, so buyers compare finished systems rather than motherboards.

The BGA 2540 footprint is shared with the other Panther Lake H processors and the Arc G3 handheld parts, from 12-core mainstream SKUs to 16-core flagships. Sharing a package does not create an upgrade path, since moving between SKUs still means a different board build with different firmware and validation. Shoppers decide between the 356H and the 366H at purchase based on price and peak clock needs.

Memory, PCIe and cooling

Memory is dual-channel LPDDR5X up to 8533 MT/s or DDR5 up to 7200 MT/s, with up to 96 GB of LPDDR5X or 128 GB of DDR5 depending on the design, and the fitted type and size are fixed when the board is built. The DDR5 option lets makers serve price sensitive laptops, while LPDDR5X serves thin designs that prize power efficiency. Capacity planning belongs at purchase time because soldered builds accept no later additions.

Expansion is generous at twenty PCIe lanes across PCI Express 5.0 and 4.0, configured as twelve Gen 5 lanes plus eight Gen 4 lanes, with Thunderbolt 4 for docks and fast external storage. Those lanes serve NVMe storage, discrete graphics and high speed peripherals on boards that include them, while display output runs through the integrated graphics with eDP 1.5, DisplayPort 2.1 and HDMI 2.1. The exact lane split and port list are set per system design, so the vendor specification governs what each chassis exposes.

Cooling is a system responsibility across the 15 W to 80 W span. Four Performance-cores at 4.7 GHz make sustained all-core loads the hardest case for a thin chassis, so fan and heatsink choice decides how long the chip holds peak clocks. There is no boxed cooler and no retail heatsink list for a soldered mobile processor, and power policy in firmware decides the balance between fan noise and speed.

Upgrade paths

There is no CPU upgrade path on a soldered package. When sixteen cores stop being enough, the step is a new system, since the 356H already opens the 16-core range and every faster part on the same socket still means a different board. Memory size and type changes mean a new board for the same reason, so buyers should size capacity at purchase.

Moving off BGA 2540 means a new platform. Higher power designs with socketed desktop or HX mobile processors serve sustained workstation loads, while the X models serve thin laptops that rely on integrated graphics. The LGA, PGA and BGA: CPU package types explained guide explains how soldered packages differ from socketed ones and why the whole device is the unit of replacement here.