i9-9800X vs i9-7940X

#ad 
Buy on Amazon
VS

Primary details

Comparing Core i9-7940X and Core i9-9800X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking408not rated
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.30no data
Market segmentDesktop processorDesktop processor
SeriesIntel Core i9no data
Power efficiency9.37no data
Architecture codenameSkylake (server) (2017−2018)Skylake-X (2018)
Release date1 September 2017 (7 years ago)October 2018 (6 years ago)
Launch price (MSRP)$1,399no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i9-7940X and Core i9-9800X 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 cores14 (Tetradeca-Core)8 (Octa-Core)
Threads2816
Base clock speed3.1 GHzno data
Boost clock speed4.4 GHz3.8 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
L1 cache64 KB (per core)64K (per core)
L2 cache1 MB (per core)1 MB (per core)
L3 cache19.25 MB (shared)16.5 MB (shared)
Chip lithography14 nm14 nm
Die size484 mm2no data
Maximum core temperature102 °Cno data
Maximum case temperature (TCase)no data72 °C
64 bit support++
Windows 11 compatibility+-
Unlocked multiplier++

Compatibility

Information on Core i9-7940X and Core i9-9800X 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
SocketFCLGA20662066
Power consumption (TDP)165 Watt165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7940X and Core i9-9800X. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512no data
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX++
Turbo Boost Max 3.0+no data

Security technologies

Core i9-7940X and Core i9-9800X technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDB+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7940X and Core i9-9800X are enumerated here.

VT-d++
VT-x++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7940X and Core i9-9800X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-2666DDR4
Maximum memory size128 GBno data
Max memory channels4no data
Maximum memory bandwidth85.33 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/Ano data

Peripherals

Specifications and connection of peripherals supported by Core i9-7940X and Core i9-9800X.

PCIe version3.0no data
PCI Express lanes44no data

Pros & cons summary


Physical cores 14 8
Threads 28 16

i9-7940X has 75% more physical cores and 75% more threads.

We couldn't decide between Core i9-7940X and Core i9-9800X. We've got no test results to judge.


Should you still have questions on choice between Core i9-7940X and Core i9-9800X, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core i9-7940X
Core i9-7940X
Intel Core i9-9800X
Core i9-9800X

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


4.4 43 votes

Rate Core i9-7940X on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.8 4 votes

Rate Core i9-9800X on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Core i9-7940X or Core i9-9800X, agree or disagree with our judgements, or report an error or mismatch.