Intel Core Ultra 7 265KF socket: LGA 1851
The Intel Core Ultra 7 265KF uses the LGA 1851 socket. It is the 20-core Arrow Lake processor without integrated graphics, so a system needs a separate graphics card.
- Socket
- LGA 1851
- Launched
- October 24, 2024
- Cores and threads
- 20 and 20
- Base power
- 125 W
- Codename
- Arrow Lake
- Segment
- Desktop
- Family
- Intel Core Ultra 7
- Clocks
- 3.9 / 5.5 GHz
Intel Core Ultra 7 265KF specifications
| Cores | 20 (8 Performance-cores and 12 Efficient-cores) |
|---|---|
| Threads | 20 (no Hyper-Threading) |
| Core architecture | Lion Cove (P-cores) and Skymont (E-cores) |
| P-core clocks | 3.9 GHz base, up to 5.4 GHz turbo, 5.5 GHz with Turbo Boost Max 3.0 |
| E-core clocks | 3.3 GHz base, up to 4.6 GHz turbo |
| Cache | 30 MB Intel Smart Cache (L3) and 36 MB total L2 |
| Processor base power (TDP) | 125 W |
| Maximum turbo power | 250 W |
| Manufacturing process | TSMC N3B (compute tile) |
| Memory support | DDR5 up to 6400 MT/s, two channels, up to 256 GB |
| PCI Express | 24 lanes from the CPU: PCIe 5.0 and PCIe 4.0 |
| Integrated graphics | None (the F suffix means no graphics) |
| NPU | Intel AI Boost, 13 TOPS |
| Multiplier | Unlocked (K series) |
| ECC memory | Not supported |
| Package | FCLGA1851, 45 × 37.5 mm |
| Cooler in the box | None |
| Launch price | $379 (tray) or $389 (boxed), Intel recommended customer price |
Motherboard and chipset compatibility
Intel Core Ultra 7 265KF needs a motherboard with a LGA 1851 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 800 series | Z890, B860, H810, Q870, W880 | 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 1851.
Recommended GPU pairing
| Recommended tier | High-end 4K |
|---|---|
| Example GPUs | GeForce RTX 5080, Radeon RX 7900 XTX |
| Target resolution | 4K high settings |
Twenty cores with boost to 5.5 GHz, 24 PCIe lanes with PCIe 5.0 graphics and DDR5-6400 feed high-end 4K cards from its era. The RTX 5080 from January 2025 and the RX 7900 XTX from December 2022 match that class at 4K high settings.
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 1851 at a glance
| Type | LGA, 1,851 contacts |
|---|---|
| Package size | 45.0 × 37.5 mm |
| Introduced | October 2024 |
| Memory | DDR5 only |
| Cooler mounting holes | 78 × 78 mm |
What the Core Ultra 7 265KF is
The Core Ultra 7 265KF is a 20 core desktop processor from Intel's Core Ultra 200S family, released in October 2024 under the codename Arrow Lake. It has 8 Performance-cores and 12 Efficient-cores for 20 cores and, with no Hyper-Threading, 20 threads. Performance-cores run 3.9 GHz base to 5.4 GHz turbo, reaching 5.5 GHz with Turbo Boost Max 3.0, while Efficient-cores run 3.3 GHz to 4.6 GHz. The 30 MB L3 cache is shared with 36 MB of total L2.
The F in the name means the integrated graphics are disabled, so the system shows nothing without a discrete card, and the chip costs less than the graphics equipped 265K for it. Intel rates the base power at 125 W with maximum turbo power at 250 W. The compute tile uses TSMC N3B.
An Intel AI Boost NPU with 13 TOPS covers local AI features. The launch price was $379 tray or $389 boxed, and the K suffix marks the unlocked multiplier. Intel includes no cooler.
Socket and motherboard compatibility
The 265KF goes into an LGA 1851 socket. Only motherboards with 800 series chipsets (Z890, B860, H810, Q870, W880) carry it. It is not compatible with the 600 and 700 series boards of LGA 1700.
Z890 boards unlock the multiplier for K-series overclocking, while B860 boards run rated clocks with memory tuning. Because the chip has no graphics, board display outputs stay dark regardless of chipset.
LGA 1851 boards take DDR5 only, so DDR4 modules cannot transfer. Intel specifies DDR5-6400 across two channels to 256 GB.
Memory, PCIe and cooling
The processor provides 24 PCIe lanes split between PCIe 5.0 and 4.0: a x16 graphics link with additional x4 links for NVMe storage, configurable per board. A discrete graphics card is mandatory here, so the x16 slot choice matters more than on graphics equipped SKUs.
Cooling must handle 125 W base and up to 250 W turbo during heavy loads, so a capable air cooler or liquid cooler is realistic. Mounting holes keep the 78 mm pattern shared with LGA 1700, so many LGA 1700 coolers carry over with maker approval. The CPU cooler compatibility by socket guide covers the patterns.
Memory overclocking through XMP profiles works on supporting boards. ECC is not supported on this SKU, unlike some relatives.
Cores, threads and NPU
Twenty cores without Hyper-Threading give one thread per core, which simplifies scheduling for games and creation software alike. Skymont Efficient-cores take background and throughput work while Lion Cove Performance-cores take latency sensitive tasks.
The 13 TOPS NPU handles Copilot+ style local AI with enough system memory. Display and media need the discrete card, since the integrated GPU is disabled on the F suffix.
Against the graphics equipped Intel Core Ultra 7 265K the KF saves money for builders who buy a discrete card anyway, which is most gaming rigs at this level.
Upgrade paths
Within LGA 1851 the 265KF sits below the 24-core 285K and above the Core Ultra 5 range. Coming from 14th Gen, such as the Intel Core i9-14900K, the move needs a new board and DDR5 memory.
Intel's next desktop generation is reported to use a different socket, so LGA 1851 may not extend past the current family. Compare AM5, where AMD stated support through 2029, when long upgrade paths matter.
Frequently asked questions
What socket does the Intel Core Ultra 7 265KF use?
It uses LGA 1851, written FCLGA1851 in Intel's documents.
Does the 265KF have integrated graphics?
No. The F suffix means the graphics are disabled, so the system needs a separate graphics card. The 265K without the F has integrated graphics.
Does the 265KF support DDR4?
No. LGA 1851 boards use DDR5 only.
Does the 265KF have Hyper-Threading?
No. It has 20 cores and 20 threads, one thread per core.
Does the 265KF come with a cooler?
No. Intel does not bundle a cooler with K-series processors.
Sources and verification
Facts last checked against these sources on . Page last edited on .