i7-9800X vs i9-9820X

Aggregate performance score

Core i9-9820X
2018
10 cores / 20 threads, 165 Watt
12.74
+11.9%
Core i7-9800X
2018
8 cores / 16 threads, 165 Watt
11.39

Core i9-9820X outperforms Core i7-9800X by a moderate 12% based on our aggregate benchmark results.

Primary details

Comparing Core i9-9820X and Core i7-9800X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking606693
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation5.006.48
Market segmentDesktop processorDesktop processor
SeriesIntel Core i9Intel Core i7
Power efficiency7.316.53
Architecture codenameSkylake (server) (2017−2018)Skylake (server) (2017−2018)
Release date8 October 2018 (6 years ago)8 October 2018 (6 years ago)
Launch price (MSRP)$898$589

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-9800X has 30% better value for money than i9-9820X.

Detailed specifications

Core i9-9820X and Core i7-9800X 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 cores10 (Deca-Core)8 (Octa-Core)
Threads2016
Base clock speed3.3 GHz3.8 GHz
Boost clock speed4.2 GHz4.5 GHz
Bus typeDMI 3.0DMI 3.0
Bus rate4 × 8 GT/s4 × 8 GT/s
Multiplier3338
L1 cache640 KB512 KB
L2 cache10 MB8 MB
L3 cache16.5 MB (shared)16.5 MB (shared)
Chip lithography14 nm14 nm
Maximum core temperature92 °C95 °C
Maximum case temperature (TCase)72 °C72 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplier++

Compatibility

Information on Core i9-9820X and Core i7-9800X 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 (Uniprocessor)
SocketFCLGA2066FCLGA2066
Power consumption (TDP)165 Watt165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-9820X and Core i7-9800X. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX++
Turbo Boost Max 3.0++

Security technologies

Core i9-9820X and Core i7-9800X technologies aimed at improving security, for example, by protecting against hacks.

EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-9820X and Core i7-9800X are enumerated here.

VT-d++
VT-x++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-9820X and Core i7-9800X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-2666DDR4-2666
Maximum memory size128 GB128 GB
Max memory channels44
Maximum memory bandwidth85.33 GB/s85.33 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/AN/A

Peripherals

Specifications and connection of peripherals supported by Core i9-9820X and Core i7-9800X.

PCIe version3.03.0
PCI Express lanes4444

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.

i9-9820X 12.74
+11.9%
i7-9800X 11.39

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.

i9-9820X 20234
+11.9%
i7-9800X 18089

Gaming performance

Pros & cons summary


Performance score 12.74 11.39
Physical cores 10 8
Threads 20 16

i9-9820X has a 11.9% higher aggregate performance score, and 25% more physical cores and 25% more threads.

The Core i9-9820X is our recommended choice as it beats the Core i7-9800X in performance tests.


Should you still have questions on choice between Core i9-9820X and Core i7-9800X, 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 i9-9820X
Core i9-9820X
Intel Core i7-9800X
Core i7-9800X

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.


3.2 44 votes

Rate Core i9-9820X on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.2 81 vote

Rate Core i7-9800X on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Core i9-9820X or Core i7-9800X, agree or disagree with our judgements, or report an error or mismatch.