Intel Core i9-9900KF vs Intel Core i9-7940X

Comparative analysis of Intel Core i9-9900KF and Intel Core i9-7940X processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, 3DMark Fire Strike - Physics Score.

 

Differences

Reasons to consider the Intel Core i9-9900KF

  • Around 16% higher clock speed: 5.00 GHz vs 4.30 GHz
  • Around 74% lower typical power consumption: 95 Watt vs 165 Watt
  • Around 21% better performance in PassMark - Single thread mark: 2895 vs 2397
  • Around 18% better performance in Geekbench 4 - Single Core: 1351 vs 1143
Specifications (specs)
Maximum frequency 5.00 GHz vs 4.30 GHz
Thermal Design Power (TDP) 95 Watt vs 165 Watt
Benchmarks
PassMark - Single thread mark 2895 vs 2397
Geekbench 4 - Single Core 1351 vs 1143

Reasons to consider the Intel Core i9-7940X

  • Processor is unlocked, an unlocked multiplier allows for easier overclocking
  • 6 more cores, run more applications at once: 14 vs 8
  • 12 more threads: 28 vs 16
  • Around 2% higher maximum core temperature: 102°C vs 100°C
  • Around 25% better performance in PassMark - CPU mark: 25415 vs 20306
  • Around 51% better performance in Geekbench 4 - Multi-Core: 13357 vs 8837
Specifications (specs)
Unlocked Unlocked vs Locked
Number of cores 14 vs 8
Number of threads 28 vs 16
Maximum core temperature 102°C vs 100°C
Benchmarks
PassMark - CPU mark 25415 vs 20306
Geekbench 4 - Multi-Core 13357 vs 8837

Compare benchmarks

CPU 1: Intel Core i9-9900KF
CPU 2: Intel Core i9-7940X

PassMark - Single thread mark
CPU 1
CPU 2
2895
2397
PassMark - CPU mark
CPU 1
CPU 2
20306
25415
Geekbench 4 - Single Core
CPU 1
CPU 2
1351
1143
Geekbench 4 - Multi-Core
CPU 1
CPU 2
8837
13357
Name Intel Core i9-9900KF Intel Core i9-7940X
PassMark - Single thread mark 2895 2397
PassMark - CPU mark 20306 25415
Geekbench 4 - Single Core 1351 1143
Geekbench 4 - Multi-Core 8837 13357
3DMark Fire Strike - Physics Score 0 0

Compare specifications (specs)

Intel Core i9-9900KF Intel Core i9-7940X

Essentials

Architecture codename Coffee Lake Skylake
Launch date Q1'19 September 2017
Place in performance rating 289 278
Processor Number i9-9900KF i9-7940X
Series 9th Generation Intel® Core™ i9 Processors Intel® Core™ X-series Processors
Status Launched Launched
Vertical segment Desktop Desktop
Launch price (MSRP) $1,399
Price now $1,129.99
Value for money (0-100) 6.63

Performance

64 bit support
Base frequency 3.60 GHz 3.10 GHz
Bus Speed 8 GT/s DMI3 8 GT/s DMI3
Manufacturing process technology 14 nm 14 nm
Maximum core temperature 100°C 102°C
Maximum frequency 5.00 GHz 4.30 GHz
Number of cores 8 14
Number of threads 16 28
L1 cache 64 KB (per core)
L2 cache 1024 KB (per core)
L3 cache 19712 KB (shared)
Number of QPI Links 0
Unlocked

Memory

Max memory channels 2 4
Maximum memory bandwidth 41.6 GB/s
Maximum memory size 128 GB 128 GB
Supported memory types DDR4-2666 DDR4-2666

Compatibility

Max number of CPUs in a configuration 1 1
Package Size 37.5mm x 37.5mm
Sockets supported FCLGA1151 FCLGA2066
Thermal Design Power (TDP) 95 Watt 165 Watt
Thermal Solution PCG 2015D (130W) PCG 2017X
Low Halogen Options Available

Peripherals

Max number of PCIe lanes 16 44
PCI Express revision 3.0 3.0
PCIe configurations Up to 1x16, 2x8, 1x8+2x4
Scalability 1S Only 1S Only

Security & Reliability

Execute Disable Bit (EDB)
Intel® Identity Protection technology
Intel® Memory Protection Extensions (Intel® MPX)
Intel® OS Guard
Intel® Secure Key technology
Intel® Software Guard Extensions (Intel® SGX)
Intel® Trusted Execution technology (TXT)
Secure Boot

Advanced Technologies

Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
Intel 64
Intel® AES New Instructions
Intel® Hyper-Threading technology
Intel® Optane™ Memory Supported
Intel® Stable Image Platform Program (SIPP)
Intel® TSX-NI
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Thermal Monitoring
Intel® Advanced Vector Extensions (AVX)
Number of AVX-512 FMA Units 2

Virtualization

Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)