Intel Core i5-12400T socket: LGA 1700

What the Core i5-12400T is

Within the Alder Lake stack, the Core i5-12400T ranks as the 6-core member of the 12th Gen Core family for LGA 1700 boards from January 2022. 6 Golden Cove Performance-cores with Hyper-Threading give 6 cores and 12 threads, with base at 1.8 GHz and up to 4.2 GHz boost. The package carries 18 MB of Smart Cache plus 7.5 MB of total L2. The 35 W envelope fits compact heatsinks with modest airflow.

DDR5 up to 4800 MT/s or DDR4 up to 3200 MT/s in two channels up to 128 GB feeds the cores, and the board memory type is fixed at build time. Twenty CPU lanes split as Gen5 x16 plus Gen4 x4 wire a graphics card and NVMe. The Intel UHD Graphics 730 with 24 execution units up to 1.45 GHz drives displays without a card.

Low power six-core desktops take this 35 W T part with UHD 730 graphics, where six threads per watt suit quiet builds. Boards need a 600 or 700 series board with the Core i5-12400T on the CPU support list. The Socket vs chipset: what decides whether a CPU works guide covers board choice, and Intel Core i5-12500TE shows a nearby Alder Lake option on the same socket.

Socket and motherboard compatibility

The 12400T fits LGA 1700 on single socket desktop boards with LGA 1700 retention and desktop power delivery. Board lists must name the Core i5-12400T part for qualification, including the suffix for T, TE and E low power variants.

600 series boards accept the chip with a shipping BIOS, and 700 series boards cover it as well per the socket compatibility table. Check the board CPU list before mixing this SKU with other steppings.

Memory, PCIe and cooling

DDR5 up to 4800 MT/s or DDR4 up to 3200 MT/s in two channels up to 128 GB feeds the cores, and matched DIMMs hold the rated speed. The board memory type is fixed at purchase, so DDR4 and DDR5 boards are separate designs.

Twenty CPU lanes as Gen5 x16 plus Gen4 x4 wire a graphics card and NVMe, with the exact split fixed per board. Boards that need more than the CPU offers use chipset lanes for SATA, USB and extra slots.

Cooling is a 35 W heatsink with the mounting that matches the chassis, since tray parts ship without a cooler. The 45.0 × 37.5 mm FCLGA1700 package uses standard LGA retention with even mounting pressure.

Upgrade paths

On LGA 1700 the upward moves are higher core Alder Lake and Raptor Lake parts where thread counts grow, up to i7 and i9 SKUs on boards with the power delivery for them. For this 6-core SKU, memory growth and a discrete graphics card often help more than clocks.

Outside this SKU, Intel Core i5-12500TE (Core i5-12500TE) on LGA 1700 trims or adds cores for lighter or denser builds. A move to LGA 1851 needs a new board with DDR5, so socket local growth comes first.