Ultra 5 245KF vs i9-7940X

Primary details

Comparing Core i9-7940X and Core Ultra 5 245KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	406	176
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.32	81.94
Market segment	Desktop processor	Desktop processor
Series	Intel Core i9	no data
Power efficiency	9.32	20.74
Architecture codename	Skylake (server) (2017−2018)	Arrow Lake-S (2024−2025)
Release date	1 September 2017 (7 years ago)	24 October 2024 (less than a year ago)
Launch price (MSRP)	$1,399	$294

Cost-effectiveness evaluation

Performance per price, higher is better.

Ultra 5 245KF has 2368% better value for money than i9-7940X.

Detailed specifications

Core i9-7940X and Core Ultra 5 245KF basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	14 (Tetradeca-Core)	14 (Tetradeca-Core)
Threads	28	14
Base clock speed	3.1 GHz	4.2 GHz
Boost clock speed	4.4 GHz	5.2 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
L1 cache	64 KB (per core)	112 KB (per core)
L2 cache	1 MB (per core)	3 MB (per core)
L3 cache	19.25 MB (shared)	24 MB (shared)
Chip lithography	14 nm	3 nm
Die size	484 mm2	243 mm2
Maximum core temperature	102 °C	no data
Number of transistors	no data	17,800 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	-

Compatibility

Information on Core i9-7940X and Core Ultra 5 245KF compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1 (Uniprocessor)	1
Socket	FCLGA2066	1851
Power consumption (TDP)	165 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7940X and Core Ultra 5 245KF. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	no data
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	+
Turbo Boost Max 3.0	+	no data

Security technologies

Core i9-7940X and Core Ultra 5 245KF technologies aimed at improving security, for example, by protecting against hacks.

TXT	no data	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7940X and Core Ultra 5 245KF are enumerated here.

VT-d	+	+
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7940X and Core Ultra 5 245KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR5
Maximum memory size	128 GB	no data
Max memory channels	4	no data
Maximum memory bandwidth	85.33 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

Peripherals

Specifications and connection of peripherals supported by Core i9-7940X and Core Ultra 5 245KF.

PCIe version	3.0	5.0
PCI Express lanes	44	20

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	16.34	27.54
Recency	1 September 2017	24 October 2024
Threads	28	14
Chip lithography	14 nm	3 nm
Power consumption (TDP)	165 Watt	125 Watt

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Should you still have questions on choice between Core i9-7940X and Core Ultra 5 245KF, ask them in Comments section, and we shall answer.

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