To get the index we compare the characteristics of the processors and their cost, taking into account the cost of other processors.
Intel Core i9-9940X: specs and benchmarks
- Core clock speed
- Max video memory
- Memory type
- Memory clock speed
- Maximum resolution
Intel started Intel Core i9-9940X sales 8 October 2018 at a recommended price of $1,387. Based on Skylake-X architecture, this desktop processor is primarily aimed at home systems. It has 14 cores and 28 threads, and is based on 14 nm manufacturing technology, with a max turbo frequency of 4500 MHz and an unlocked multiplier.
Compatibility-wise, this is FCLGA2066 processor with a TDP of 165 Watt. It supports DDR4-2666 memory.
It provides good benchmark performance at
of a leader's which is AMD Ryzen Threadripper PRO 5995WX.
Of Core i9-9940X processor market type (desktop or notebook), architecture, sales start time and pricing.
|Place in performance rating||150|
|Value for money||21.09|
|Market segment||Desktop processor|
|Series||Intel Core i9|
|Architecture codename||Skylake-X (2018)|
|Release date||8 October 2018 (3 years ago)|
|Launch price (MSRP)||$1,387||of 305 (Core i7-870)|
|Price now||$988 (0.7x MSRP)||of 14999 (Xeon Platinum 9282)|
Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.
|Physical cores||14 (Tetradeca-Core)|
|Base clock speed||3.3 GHz||of 4.7 (FX-9590)|
|Boost clock speed||4.5 GHz||of 5.5 (Core i9-12900KS)|
|Bus support||4 × 8 GT/s|
|L1 cache||896 KB||of 1536 (EPYC Embedded 3401)|
|L2 cache||14 MB||of 12 (Core 2 Quad Q9550)|
|L3 cache||19.25 MB (shared)||of 32 (Ryzen Threadripper 1998)|
|Chip lithography||14 nm||of 5 (Apple M1)|
|Maximum core temperature||88 °C||of 110 (Atom x7-E3950)|
|64 bit support||+|
|Windows 11 compatibility||+|
Information on Core i9-9940X compatibility with other computer components and devices: 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 configuration||1||of 8 (Opteron 842)|
|Thermal design power (TDP)||165 Watt||of 400 (Xeon Platinum 9282)|
Technologies and extensions
Technological capabilities and additional instructions supported by Core i9-9940X. You'll probably need this information if you require some particular technology.
|Instruction set extensions||Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512|
|Enhanced SpeedStep (EIST)||+|
|Turbo Boost Technology||2.0|
|Turbo Boost Max 3.0||+|
Processor technologies aimed at improving security, for example, by protecting against hacks.
Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.
Types, maximum amount and channel number of RAM supported by Core i9-9940X's memory controller. Depending on the motherboard, higher memory frequency may be supported.
|Supported memory types||DDR4-2666||of 4800 (Ryzen 9 6980HX)|
|Maximum memory size||128 GB||of 786 (Xeon E5-2670 v3)|
|Max memory channels||4||of 12 (Xeon Platinum 9221)|
|Maximum memory bandwidth||85 GB/s||of 281.6 (Xeon Platinum 9221)|
|ECC memory support||-|
General parameters of GPU integrated into Core i9-9940X.
|Integrated graphics card||-|
Specifications and connection types of supported peripherals.
|PCI Express lanes||44||of 128 (EPYC 7551P)|
Single-core and multi-core benchmark results of Core i9-9940X. Overall benchmark performance is measured in points in 0-100 range, higher is better.
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.
- GeekBench 5 Single-Core
- GeekBench 5 Multi-Core
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.
Benchmark coverage: 68%
GeekBench 5 Single-Core
Benchmark coverage: 37%
GeekBench 5 Multi-Core
Benchmark coverage: 37%
Overall Core i9-9940X performance compared to nearest competitors among desktop CPUs.
We believe that the nearest equivalent to Core i9-9940X by AMD is Ryzen 7 5800X, which is slower by 1% and lower by 1 position in our rating.
Here are some closest AMD rivals to Core i9-9940X:
Here is our recommendation of several processors that are more or less close in performance to the one reviewed.
Recommended graphics cards
These graphics cards are most commonly used with Core i9-9940X according to our statistics.
Here is the rating given to the reviewed processor by our users. Let others know your opinion by rating it yourself.