Intel Core i9-10900K socket: LGA 1200
The Intel Core i9-10900K uses the LGA 1200 socket. It is the 10-core Comet Lake flagship with the highest thread count of its generation, running on 400 series boards and later 500 series boards.
- Socket
- LGA 1200
- Launched
- May 2020
- Cores and threads
- 10 and 20
- Base power
- 125 W
- Codename
- Comet Lake
- Segment
- Desktop
- Family
- Intel Core i9
- Clocks
- 3.7 / 5.3 GHz
Intel Core i9-10900K specifications
| Cores | 10 |
|---|---|
| Threads | 20 |
| Core architecture | Skylake based cores on 14 nm |
| Clocks | 3.7 GHz base, up to 5.1 GHz (Turbo Boost 2.0), 5.2 GHz (Turbo Boost Max 3.0), 5.3 GHz (Thermal Velocity Boost) |
| Cache | 20 MB Intel Smart Cache (L3) and 2.5 MB total L2 |
| Processor base power (TDP) | 125 W |
| Maximum turbo power | 250 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4 up to 2933 MT/s, two channels, up to 128 GB |
| PCI Express | 16 lanes from the CPU, PCIe 3.0 |
| Integrated graphics | Intel UHD Graphics 630 (up to 1.20 GHz) |
| Multiplier | Unlocked (K series) |
| Package | FCLGA1200 |
| Cooler in the box | None |
| Launch price | $488 (Intel RCP) |
Motherboard and chipset compatibility
Intel Core i9-10900K needs a motherboard with a LGA 1200 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 500 series | Z590, H570, B560, H510, Q570, W580 | Works out of the box |
| 400 series: Z490, H470, Q470, W480 | Z490, H470, Q470, W480 | Works out of the box |
| 400 series: B460, H410 | B460, H410 | Works out of the box |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 1200.
Recommended GPU pairing
| Recommended tier | High-end 1440p |
|---|---|
| Example GPUs | GeForce RTX 3080, Radeon RX 6800 XT |
| Target resolution | 1440p high settings |
Ten cores with boost to 5.3 GHz, 16 PCIe 3.0 lanes and DDR4 match high-end 1440p cards from 2020. A faster card still works and the balance shifts with game, settings and resolution.
This is a rough match for a new build at the stated resolution, not a limit. A faster card still works and helps at higher resolutions or in games that load the GPU more than the CPU. A slower card is fine for lighter games and office use. The exact balance shifts with the game, the settings and the resolution, so no percentage is given.
LGA 1200 at a glance
| Type | LGA, 1,200 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | April 2020 |
| Memory | DDR4 only |
| Cooler mounting holes | 75 × 75 mm |
What the Core i9-10900K is
The Core i9-10900K is a ten core, twenty thread processor that Intel released in May 2020 at the top of the 10th Gen Comet Lake range. Its cores run 3.7 GHz base to 5.1 GHz turbo with Turbo Boost 2.0, reaching 5.2 GHz with Turbo Boost Max 3.0 and 5.3 GHz with Thermal Velocity Boost. Cache is 20 MB of shared L3 with 2.5 MB of total L2.
Comet Lake added two cores over the prior flagship while keeping the Skylake lineage and 14 nm process, which made it the thread-count leader of 2020 on the mainstream desktop. Intel rates the TDP at 125 W with maximum turbo power at 250 W.
Intel UHD Graphics 630 cover display output, at up to 1.20 GHz. The multiplier is unlocked. The launch price was $488 (Intel RCP). Intel includes no cooler with K-series processors.
Socket and motherboard compatibility
The 10900K fits the LGA 1200 socket and launched with the 400 series chipsets (Z490, H470, Q470, W480, B460, H410). Later 500 series boards accept Comet Lake natively as well, so both board generations run it with the shipping BIOS.
A Z490 or Z590 board unlocks the multiplier. Other chipsets hold rated clocks with memory tuning on most models. At 125 W base with 250 W peaks, board voltage stages decide how long full boost holds, so check the board's power design.
The board maker's CPU support list confirms compatibility. Comet Lake needs no update anywhere on this socket, unlike Rocket Lake on 400 series boards.
Memory, PCIe and cooling
The memory controller supports DDR4 up to 2933 MT/s officially. Two channels carry up to 128 GB. Faster kits run through XMP profiles, which count as overclocking from the processor's point of view.
The CPU supplies 16 PCIe 3.0 lanes from the processor. Chipset lanes cover the remaining slots and drives at lower speeds. There is no PCIe 4.0 here: that arrived with Rocket Lake.
Cooling should target the 250 W ceiling rather than the 125 W base. A large air cooler or liquid cooler is realistic. Mounting uses the 75 mm LGA 1200 pattern shared with older Intel sockets, covered in the CPU cooler compatibility by socket guide.
Ten cores first, PCIe 3.0 throughout
Two traits define Comet Lake on this socket. The 10-core die gives it more threads than any Rocket Lake chip that followed, which kept it competitive in rendering long after launch. The trade is connectivity: PCIe 3.0 only, with no Gen 4 link for graphics or storage.
Power behavior matches the era. Short boosts draw near 250 W, so sustained all-core work needs cooling and board power delivery sized for it. A 95 W configurable TDP-down mode exists for constrained builds at reduced clocks.
Upgrade paths
On the socket the 10900K was later challenged by the Intel Core i9-11900K, which raised per-core speed and added PCIe 4.0 with two fewer cores. Against the Intel Core i7-10700K, it adds two cores and more cache for threaded work.
Moving to LGA 1700 needs a new board, new memory for DDR5 builds, and a new cooler bracket. The 10900K fits a 400 series board that stays in service with the most threads of its generation.
Frequently asked questions
What socket does the Intel Core i9-10900K use?
It uses LGA 1200, written FCLGA1200 in Intel's documents.
What is the difference between the 10900K and the 10900KF?
The KF has no integrated graphics and needs a separate card. Cores, clocks, cache and power match the K.
Does the 10900K run in a Z590 motherboard?
Yes. Z590, H570 and B560 boards accept Comet Lake natively, with no update needed.
What memory speed does the 10900K support?
Officially up to DDR4-2933. Faster kits run through XMP profiles, which count as overclocking.
Does the 10900K come with a cooler?
No. Intel ships K-series processors without a cooler, and 250 W peaks need a large air cooler or liquid cooler.
Sources and verification
Facts last checked against these sources on . Page last edited on .