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

Comparative analysis of Intel Core i9-9900X 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.

Intel Core i9-9900X

Intel Core i9-7940X

Differences

Reasons to consider the Intel Core i9-9900X

CPU is newer: launch date 1 year(s) 0 month(s) later
Around 2% higher clock speed: 4.40 GHz vs 4.30 GHz
Around 3% better performance in PassMark - Single thread mark: 2565 vs 2491

Specifications (specs)
Launch date	October 2018 vs September 2017
Maximum frequency	4.40 GHz vs 4.30 GHz
Benchmarks
PassMark - Single thread mark	2565 vs 2491

Reasons to consider the Intel Core i9-7940X

4 more cores, run more applications at once: 14 vs 10
8 more threads: 28 vs 20
Around 11% higher maximum core temperature: 102°C vs 92°C
Around 40% more L1 cache; more data can be stored in the L1 cache for quick access later
Around 40% more L2 cache; more data can be stored in the L2 cache for quick access later
Around 19% better performance in PassMark - CPU mark: 25966 vs 21819
Around 1% better performance in Geekbench 4 - Single Core: 1153 vs 1136
Around 24% better performance in Geekbench 4 - Multi-Core: 12928 vs 10446
Around 6% better performance in 3DMark Fire Strike - Physics Score: 10950 vs 10364

Specifications (specs)
Number of cores	14 vs 10
Number of threads	28 vs 20
Maximum core temperature	102°C vs 92°C
L1 cache	64 KB (per core) vs 64K (per core)
L2 cache	1024 KB (per core) vs 1 MB (per core)
Benchmarks
PassMark - CPU mark	25966 vs 21819
Geekbench 4 - Single Core	1153 vs 1136
Geekbench 4 - Multi-Core	12928 vs 10446
3DMark Fire Strike - Physics Score	10950 vs 10364

Compare benchmarks

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

PassMark - Single thread mark

CPU 1

CPU 2

2565

2491

PassMark - CPU mark

CPU 1

CPU 2

21819

25966

Geekbench 4 - Single Core

CPU 1

CPU 2

1136

1153

Geekbench 4 - Multi-Core

CPU 1

CPU 2

10446

12928

3DMark Fire Strike - Physics Score

CPU 1

CPU 2

10364

10950

Name	Intel Core i9-9900X	Intel Core i9-7940X
PassMark - Single thread mark	2565	2491
PassMark - CPU mark	21819	25966
Geekbench 4 - Single Core	1136	1153
Geekbench 4 - Multi-Core	10446	12928
3DMark Fire Strike - Physics Score	10364	10950

Compare specifications (specs)

	Intel Core i9-9900X	Intel Core i9-7940X
Essentials
Architecture codename	Skylake	Skylake
Launch date	October 2018	September 2017
Place in performance rating	843	748
Processor Number	i9-9900X	i9-7940X
Series	Intel® Core™ X-series 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	3.50 GHz	3.10 GHz
Bus Speed	8 GT/s DMI3	8 GT/s DMI3
L1 cache	64K (per core)	64 KB (per core)
L2 cache	1 MB (per core)	1024 KB (per core)
L3 cache	19.25 MB (shared)	19712 KB (shared)
Manufacturing process technology	14 nm	14 nm
Maximum case temperature (TCase)	72 °C
Maximum core temperature	92°C	102°C
Maximum frequency	4.40 GHz	4.30 GHz
Number of cores	10	14
Number of QPI Links	0	0
Number of threads	20	28
Unlocked
Memory
Max memory channels	4	4
Maximum memory size	128 GB	128 GB
Supported memory types	DDR4-2666	DDR4-2666
Compatibility
Max number of CPUs in a configuration	1	1
Sockets supported	FCLGA2066	FCLGA2066
Thermal Design Power (TDP)	165 Watt	165 Watt
Thermal Solution	PCG 2017X	PCG 2017X
Low Halogen Options Available
Peripherals
Max number of PCIe lanes	44	44
PCI Express revision	3.0	3.0
Scalability	1S Only	1S Only
Security & Reliability
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
Intel 64
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Hyper-Threading technology
Intel® Optane™ Memory Supported
Intel® Turbo Boost technology
Number of AVX-512 FMA Units	2	2
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)