LGA1851 - Technology News Online

Intel’s Core Ultra 5 Processor 250KF Plus desktop chip is listed on Amazon India at Rs.26,479 (Lowest Price on August 25, 2026). The MRP price is Rs.30,200.

This is an Arrow Lake part in the Core Ultra Series 2 desktop line, built on TSMC N3B and dropping into the LGA1851 socket on Intel 800 Series chipset motherboards. Key specs highlights include an 18-core layout (6 P-cores and 12 E-cores), a 5.3 GHz maximum turbo frequency, 30MB of Intel Smart Cache, DDR5 support up to 7200 MT/s, and an integrated Intel AI Boost NPU rated at 13 TOPS.

The KF suffix means there is no integrated graphics on this part. A discrete graphics card is required.

Pricing & Availability

Model	Launch Price	MRP	UPC	Link
Intel Core Ultra 5 Processor 250KF Plus (PN: ULTRA 5 250KF PLUS)	Rs.26,479	Rs.30,200	735858553216	Amazon India↗

Intel® Core™ Ultra 5 Processor 250KF Plus 18 cores (6 P-cores + 12 E-cores) up to 5.3 GHz

Intel

Sold by Clicktech Retail Private Ltd

₹29,799.00 Rs.30,200.00 -1%

Price last updated on: Aug 29, 2026 at 12:30 AM IST (11 hours ago)

Intel’s own recommended customer price for the part is $204.00 to $214.00. Check the Amazon product page for price history, verified purchase reviews and current lowest price offers.

What We Like About the Core Ultra 5 250KF Plus

18 cores in a Core Ultra 5 tier part: 6 P-cores and 12 E-cores, a core count that used to sit further up the stack.
30MB Intel Smart Cache: the full L2 allocation, not a cut-down figure for the tier.
DDR5 up to 7200 MT/s across two channels: supports up to 256GB of memory.
PCIe 5.0 and 4.0 with 24 lanes: enough for a Gen 5 graphics card plus multiple Gen 4 NVMe drives.
Intel AI Boost NPU at 13 TOPS: on-chip AI acceleration, which desktop parts have not historically carried.

Cores, Clocks and Cache

The 250KF Plus runs 18 total cores, split as 6 Performance-cores and 12 Efficient-cores. There are no Low Power Efficient-cores on this part. Hyper-Threading is not supported, so thread count matches core count at 18 threads.

Clock speeds break down by core type:

Clock	Performance-cores	Efficient-cores
Max Turbo Frequency	5.3 GHz	4.6 GHz
Base Frequency	4.2 GHz	3.3 GHz

Overall maximum turbo frequency for the part is 5.3 GHz. Cache is 30MB of Intel Smart Cache, with the total L2 cache also listed at 30MB. Intel Thread Director handles scheduling work across the two core types.

Note that the Amazon listing bullets describe a 24-core configuration at up to 5.5 GHz with 250W maximum turbo power. Those figures describe higher parts in the Core Ultra Series 2 desktop range, not the 250KF Plus. Intel’s specification chart for this processor number lists 18 cores, 5.3 GHz and 159W.

Power and Thermals

Specification	Value
Processor Base Power	125 W
Maximum Turbo Power	159 W
Thermal Solution Specification	PCG 2020A
Max Operating Temperature	105 °C

Idle States, Enhanced Intel SpeedStep, Intel Speed Shift and thermal monitoring are all supported.

Memory and Platform

The chip pairs with Intel 800 Series chipset motherboards on the FCLGA1851 socket. Memory support runs to DDR5 at up to 7200 MT/s across two channels, with a maximum capacity of 256GB. ECC memory is not supported.

Expansion covers PCI Express 5.0 and 4.0 with a maximum of 24 PCIe lanes. Intel lists the supported configurations as up to 1×16+2×4, 2×8+2×4, or 1×8+4×4. DMI is revision 4 with up to 8 lanes. Thunderbolt 4 is not supported on this part, and scalability is single-socket only.

No Integrated Graphics

The KF designation is literal here. Graphics output is listed as n/a, Xe-core count is 0, Intel Quick Sync Video is not supported, and the number of supported displays is 0. A discrete graphics card is mandatory for any build using this processor.

AI Acceleration

Alongside the CPU cores, the 250KF Plus carries an Intel AI Boost NPU rated at 13 TOPS (Int8), with sparsity support and Windows Studio Effects support. Overall peak platform figure across the silicon is 22 TOPS (Int8).

Both the CPU and the NPU support OpenVINO, WindowsML, DirectML, ONNX Runtime and WebNN. Intel Deep Learning Boost is supported on the CPU side, and the Intel Gaussian and Neural Accelerator is at version 3.5.

Security and Virtualisation

Supported: Intel Threat Detection Technology, Intel Standard Manageability, Intel Secure Key, Control-Flow Enforcement Technology, AES New Instructions, Trusted Execution Technology, Execute Disable Bit, OS Guard, Boot Guard, Mode-based Execute Control, Virtualization Technology (VT-x), VT-x with Extended Page Tables, VT-d and Volume Management Device.

Not supported: Intel Active Management Technology, Remote Platform Erase, One-Click Recovery, Total Memory Encryption Multi Key, Stable IT Platform Program, and VT-rp.

Intel Core Ultra 5 Processor 250KF Plus Specifications

Specification	Details
Processor Number	250KF PLUS
Product Collection	Intel Core Ultra Processors (Series 2)
Code Name	Arrow Lake
Vertical Segment	Desktop
Launch Date	Q1 2026
Marketing Status	Launched
Lithography	TSMC N3B
Total Cores	18
Performance-cores	6
Efficient-cores	12
Low Power Efficient-cores	0
Total Threads	18
Max Turbo Frequency	5.3 GHz
P-core Max Turbo / Base	5.3 GHz / 4.2 GHz
E-core Max Turbo / Base	4.6 GHz / 3.3 GHz
Cache	30 MB Intel Smart Cache
Total L2 Cache	30 MB
Hyper-Threading	No
Processor Base Power	125 W
Maximum Turbo Power	159 W
Max Memory Size	256 GB
Memory Types	Up to DDR5 7200 MT/s
Memory Channels	2
ECC Memory	No
Graphics Output	n/a (discrete graphics required)
Xe-cores	0
NPU	Intel AI Boost, 13 TOPS (Int8)
Overall Peak TOPS (Int8)	22
PCI Express Revision	5.0 and 4.0
Max PCIe Lanes	24
DMI Revision / Lanes	4 / up to 8
Thunderbolt 4	No
Socket	FCLGA1851
Package Size	45 mm x 37.5 mm
Thermal Solution	PCG 2020A
Max Operating Temperature	105 °C
Instruction Set	64-bit
Instruction Set Extensions	Intel SSE4.1, SSE4.2, AVX2
Turbo Boost Technology	2.0
Recommended Customer Price	$204.00 to $214.00