i9-9900KF vs i9-7900X

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Aggregate performance score

Core i9-7900X
2017
10 cores / 20 threads, 140 Watt
13.76
+15.2%

Core i9-7900X outperforms Core i9-9900KF by a moderate 15% based on our aggregate benchmark results.

Primary details

Comparing Core i9-7900X and Core i9-9900KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking556670
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.058.72
Market segmentDesktop processorDesktop processor
SeriesCore i9 (Desktop)Intel Core i9
Power efficiency8.9611.46
Architecture codenameSkylake (server) (2017−2019)Coffee Lake-R (2018−2019)
Release date30 May 2017 (7 years ago)7 January 2019 (5 years ago)
Launch price (MSRP)$999$488

Cost-effectiveness evaluation

Performance per price, higher is better.

i9-9900KF has 186% better value for money than i9-7900X.

Detailed specifications

Core i9-7900X and Core i9-9900KF 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 cores10 (Deca-Core)8 (Octa-Core)
Threads2016
Base clock speed3.3 GHz3.6 GHz
Boost clock speed4.5 GHz5 GHz
Bus typeDMI 3.0DMI 3.0
Bus rate4 × 8 GT/s4 × 8 GT/s
Multiplier33no data
L1 cache640 KB512 KB
L2 cache10 MB2 MB
L3 cache13.75 MB16 MB (shared)
Chip lithography14 nm14 nm
Maximum core temperature95 °C100 °C
Maximum case temperature (TCase)72 °C72 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplier++

Compatibility

Information on Core i9-7900X and Core i9-9900KF 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 configuration1 (Uniprocessor)1 (Uniprocessor)
SocketSocket R4FCLGA1151
Power consumption (TDP)140 Watt95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7900X and Core i9-9900KF. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI++
AVX++
vPro+no data
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX++
Idle Statesno data+
Thermal Monitoring-+
Turbo Boost Max 3.0+no data

Security technologies

Core i9-7900X and Core i9-9900KF technologies aimed at improving security, for example, by protecting against hacks.

TXTno data-
EDB++
Secure Keyno data+
MPX-+
Identity Protection-+
SGXno dataYes with Intel® ME
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7900X and Core i9-9900KF are enumerated here.

AMD-V+-
VT-d++
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7900X and Core i9-9900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR4-2666
Maximum memory size128 GB128 GB
Max memory channels42
Maximum memory bandwidth85.33 GB/s42.671 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/Ano data

Peripherals

Specifications and connection of peripherals supported by Core i9-7900X and Core i9-9900KF.

PCIe version3.03.0
PCI Express lanes4416

Synthetic benchmark performance

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


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.

i9-7900X 13.76
+15.2%
i9-9900KF 11.94

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i9-7900X 21065
+15.3%
i9-9900KF 18266

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i9-7900X 1437
i9-9900KF 1723
+19.9%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i9-7900X 8806
+8.4%
i9-9900KF 8122

Gaming performance

Pros & cons summary


Performance score 13.76 11.94
Recency 30 May 2017 7 January 2019
Physical cores 10 8
Threads 20 16
Power consumption (TDP) 140 Watt 95 Watt

i9-7900X has a 15.2% higher aggregate performance score, and 25% more physical cores and 25% more threads.

i9-9900KF, on the other hand, has an age advantage of 1 year, and 47.4% lower power consumption.

The Core i9-7900X is our recommended choice as it beats the Core i9-9900KF in performance tests.


Should you still have questions on choice between Core i9-7900X and Core i9-9900KF, ask them in Comments section, and we shall answer.

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Intel Core i9-7900X
Core i9-7900X
Intel Core i9-9900KF
Core i9-9900KF

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Community ratings

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Questions & comments

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