Intel Core i9-13900KS socket: LGA 1700

What the Core i9-13900KS is

The Core i9-13900KS is a twenty-four core, thirty-two thread special edition that Intel released in January 2023. It uses selected Raptor Lake silicon with 8 Performance-cores and 16 Efficient-cores. Performance-cores run 3.2 GHz base to 5.4 GHz turbo, reaching 5.8 GHz with Turbo Boost Max 3.0 and 6.0 GHz with Thermal Velocity Boost on favored cores below the temperature threshold, while Efficient-cores run 2.4 GHz to 4.3 GHz. Cache is 36 MB of shared L3 with 32 MB of total L2.

Against the 13900K the gains are narrow: 200 MHz higher P-core base, 200 MHz higher peak boost, and a 25 W higher base power. Intel rates the base power at 150 W with maximum turbo power at 253 W, plus an Extreme Power Delivery Profile up to 320 W on boards that expose it. The process is Intel 7.

Intel UHD Graphics 770 cover display output, and the multiplier is unlocked. The launch price was $689 (Intel RCP). Supply was limited, and street pricing often ran above the recommendation.

Socket and motherboard compatibility

The 13900KS fits the LGA 1700 socket. Boards with 700 series chipsets (Z790, H770, B760) are the expected match, with 600 series boards (Z690, H670, B660, H610, Q670, W680) working after a BIOS update. Either way, confirm the board's power delivery and the minimum BIOS version in the maker's CPU support list.

A Z-series board with strong voltage stages is close to mandatory. The 150 W base rating already exceeds the 125 W of the K, and the Extreme Power Delivery Profile can hold over 300 W with high current. Thin boards and small cases are a poor match.

Thermal Velocity Boost only reaches 6.0 GHz below its temperature limit, so cooling decides whether the KS behaves differently from a K. Intel's own guidance pointed at a 360 mm liquid cooler.

Memory, PCIe and cooling

The memory controller supports DDR5 up to 5600 MT/s or DDR4 up to 3200 MT/s, with the board deciding the type. Two channels carry up to 192 GB. High DDR5 speeds help the chip stretch its legs, with XMP profiles on Z-series boards.

The CPU supplies 20 PCIe lanes: x16 at PCIe 5.0 for graphics, splittable into two x8, plus x4 at PCIe 4.0 for storage. Board makers sometimes borrow graphics lanes for a Gen 5 M.2 slot, so check the block diagram when several fast drives are planned.

Cooling is the defining requirement. Treat a 360 mm liquid cooler as the baseline, mount it on the 78 mm LGA 1700 pattern, and read the CPU cooler compatibility by socket guide before reusing older hardware.

Stability and microcode updates

Intel confirmed in 2024 that 13th and 14th Gen desktop processors could suffer Vmin shift instability from elevated voltage requests in microcode and BIOS code. It released microcode updates including 0x12B, delivered only through motherboard BIOS updates, with its Intel Default Settings profile recommended.

A binned chip pushed to 6.0 GHz lives exactly where voltage behavior matters most. Run the current BIOS with Intel Default Settings unless there is a measured reason to change it, and pursue warranty replacement when instability survives the update.

Upgrade paths

Next to the Intel Core i9-13900K, the KS buys a small frequency increase and better binning for overclocking attempts, at a clear price premium and higher base power. Most builders keep the K and spend the difference on cooling or graphics.

Later LGA 1851 platforms need a new board and DDR5 memory. The KS fits collectors and overclockers who want the fastest clocked LGA 1700 chip rather than the best value.