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Intel Core i9-11900K vs Intel Core i9-7940X


Intel Core i9-11900K on Amazon USA
Intel Core i9-7940X on Amazon USA

Comparison of the technical characteristics between the processors, with the Intel Core i9-11900K on one side and the Intel Core i9-7940X on the other side. The first is dedicated to the desktop sector, It has 8 cores, 16 threads, a maximum frequency of 5.3GHz. The second is used on the desktop segment, it has a total of 14 cores, 28 threads, its turbo frequency is set to 4.3 GHz. The following table also compares the lithography, the number of transistors (if indicated), the amount of cache memory, the maximum RAM memory capacity, the type of memory accepted, the release date, the maximum number of PCIe lanes, the values ​​obtained in Geekbench 4 and Cinebench R15.






Specifications:


Processor Intel Core i9-11900K Intel Core i9-7940X
Market Desktop Desktop
Family Rocket Lake Skylake-X
Part number(s), S-Spec Core i9-11900K BX80673I97940X,
BXC80673I97940X,
CD8067303734701,
SR3RQ
Release date Q1 2021 Q3 2017
Lithography 14 nm+++ 14 nm+
Transistors - 4,600,000,000
Cores 8 14
Threads 16 28
Base frequency 3.4 GHz 3.1 GHz
Turbo frequency 5.3 GHz 4.3 GHz
Bus speed 8 GT/s 8 GT/s
Cache memory 16 MB 19.25 MB
Max memory capacity 128 GB 128 GB
Memory types DDR4-3200 DDR4-2666
Max # of memory channels 2 4
Max memory bandwidth 45.8 GB/s 85 GB/s
Max PCIe lanes 20 44
TDP 125 W 165 W
GPU integrated graphics Intel UHD Graphics 630 (Rocket Lake) None
GPU execution units 24 -
GPU shading units 192 -
GPU base clock rate 350 MHz -
GPU max clock rate 1200 MHz -
Socket LGA1200 LGA2066
CPU-Z single thread 708 508
CPU-Z multi thread 6,443 8,841
Cinebench R15 single thread 245 188
Cinebench R15 multi-thread 2,140 2,916
Cinebench R20 single thread 604 378
Cinebench R20 multi-thread 5,748 5,875
PassMark single thread 3,754 2,500
PassMark CPU Mark 28,072 26,480
(Windows)
Geekbench 5 single core
1,808 1,134
(Windows)
Geekbench 5 multi-core
9,914 12,939
Amazon
eBay




We can better compare what are the technical differences between the two processors. The processor Intel Core i9-7940X has a larger number of cores, the maximum frequency of Intel Core i9-11900K is greater, that the PDT of Intel Core i9-11900K is lower. The Intel Core i9-11900K was designed earlier.

Performances :


Performance comparison between the two processors, for this we consider the results generated on benchmark software such as Geekbench 4.


CPU-Z - Multi-thread & single thread score
Intel Core i9-7940X#ad 508
8,841
Intel Core i9-11900K#ad 708
6,443


In single core, the difference is 39%. In multi-core, the difference in terms of gap is 37%.


CPU-Z is a system information software that provides the name of the processor, its model number, the codename, the cache levels, the package, the process. It can also gives data about the mainboard, the memory. It makes real time measurement, with finally a benchmark for the single thread, as well as for the multi thread.


Cinebench R15 - Multi-thread & single thread score
Intel Core i9-7940X#ad 188
2,916
Intel Core i9-11900K#ad 245
2,140


In single core, the difference is 30%. In multi-core, the difference in terms of gap is 36%.


Cinebench R15 evaluates the performance of CPU calculations by restoring a photorealistic 3D scene. The scene has 2,000 objects, 300,000 polygons, uses sharp and fuzzy reflections, bright areas, shadows, procedural shaders, antialiasing, and so on. The faster the rendering of the scene is created, the more powerful the PC is, with a high number of points.


Cinebench R20 - Multi-thread & single thread score
Intel Core i9-7940X#ad 378
5,875
Intel Core i9-11900K#ad 604
5,748


In single core, the difference is 60%. In multi-core, the difference in terms of gap is 2%.


Cinebench R20 is a multi-platform test software which allows to evaluate the hardware capacities of a device such as a computer, a tablet, a server. This version of Cinebench takes into account recent developments in processors with multiple cores and the latest improvements in rendering techniques. The evaluation is ultimately even more relevant.


PassMark - CPU Mark & single thread
Intel Core i9-11900K#ad 3,754
28,072
Intel Core i9-7940X#ad 2,500
26,480


In single core, the difference is 50%. In multi-core, the differential gap is 6%.


PassMark is a benchmarking software that performs several performance tests including prime numbers, integers, floating point, compression, physics, extended instructions, encoding, sorting. The higher the score is, the higher is the device capacity.


On Windows:

Geekbench 5 - Multi-core & single core score - Windows
Intel Core i9-7940X#ad 1,134
12,939
Intel Core i9-11900K#ad 1,808
9,914


In single core, the difference is 59%. In multi-core, the difference in terms of gap is 31%.


Geekbench 5 is a software for measuring the performance of a computer system, for fixed devices, mobile devices, servers. This platform makes it possible to better compare the power of the CPU, the computing power and to compare it with similar or totally different systems. Geekbench 5 includes new workloads that represent work tasks and applications that we can find in reality.


Equivalence:

Intel Core i9-11900K AMD equivalentIntel Core i9-7940X AMD equivalent

See also:

Intel Core i9-11900Intel Core i9-11900T








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