Intel Core i9-11900K vs Intel Core i9-9920X

Comparison of the technical characteristics between the processors, with the Intel Core i9-11900K on one side and the Intel Core i9-9920X 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 12 cores, 24 threads, its turbo frequency is set to 4.4 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 i9-9920X
Market	Desktop	Desktop
Family	Rocket Lake	Skylake-X
Part number(s), S-Spec	Core i9-11900K	BX80673I99920X, BXC80673I99920X, SREZ6
Release date	Q1 2021	Q4 2018
Lithography	14 nm+++	14 nm++
Cores	8	12
Threads	16	24
Base frequency	3.4 GHz	3.5 GHz
Turbo frequency	5.3 GHz	4.4 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	547
CPU-Z multi thread	6,443	7,395
Cinebench R15 single thread	245	188
Cinebench R15 multi-thread	2,140	2,784
Cinebench R20 single thread	604	460
Cinebench R20 multi-thread	5,748	6,030
PassMark single thread	3,754	2,670
PassMark CPU Mark	28,072	25,440
(Windows) Geekbench 5 single core	1,808	1,134
(Windows) Geekbench 5 multi-core	9,914	12,237
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We can better compare what are the technical differences between the two processors. The processor Intel Core i9-9920X 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 i9-9920X #ad	547 7,395
Intel Core i9-11900K #ad	708 6,443

In single core, the difference is 29%. In multi-core, the difference in terms of gap is 15%.

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 i9-9920X #ad	188 2,784
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 30%.

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 i9-9920X #ad	460 6,030
Intel Core i9-11900K #ad	604 5,748

In single core, the difference is 31%. In multi-core, the difference in terms of gap is 5%.

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 i9-9920X #ad	2,670 25,440

In single core, the difference is 41%. In multi-core, the differential gap is 10%.

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 i9-9920X #ad	1,134 12,237
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 23%.

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 equivalent Intel Core i9-9920X AMD equivalent