Ryzen 9 7945HX3D vs i9-11900KB

VS

Aggregate performance score

Core i9-11900KB
2021
8 cores / 16 threads, 65 Watt
14.42
Ryzen 9 7945HX3D
2023
16 cores / 32 threads, 55 Watt
36.25
+151%

Ryzen 9 7945HX3D outperforms Core i9-11900KB by a whopping 151% based on our aggregate benchmark results.

Primary details

Comparing Core i9-11900KB and Ryzen 9 7945HX3D processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking50198
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation17.86no data
Market segmentDesktop processorLaptop
Seriesno dataAMD Dragon Range (Zen 4, Ryzen 7045)
Power efficiency20.9962.37
Architecture codenameTiger Lake-H (2021)Dragon Range-HX (Zen 4) (2023−2024)
Release dateMay 2021 (3 years ago)27 July 2023 (1 year ago)
Launch price (MSRP)$539no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i9-11900KB and Ryzen 9 7945HX3D 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 cores8 (Octa-Core)16 (Hexadeca-Core)
Threads1632
Base clock speed3.3 GHz2.3 GHz
Boost clock speed4.9 GHz5.4 GHz
Bus rate8 GT/sno data
L1 cache80K (per core)64 KB (per core)
L2 cache1.25 MB (per core)1 MB (per core)
L3 cache24 MB (shared)128 MB (shared)
Chip lithography10 nm SuperFin5 nm
Die size190 mm22x 71 mm2
Maximum core temperature100 °C89 °C
Maximum case temperature (TCase)72 °Cno data
Number of transistorsno data17,840 million
64 bit support++
Windows 11 compatibility-no data
Unlocked multiplier++

Compatibility

Information on Core i9-11900KB and Ryzen 9 7945HX3D 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 configuration11
SocketFCBGA1787FL1
Power consumption (TDP)65 Watt55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-11900KB and Ryzen 9 7945HX3D. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2no data
AES-NI++
AVX++
Enhanced SpeedStep (EIST)+no data
Speed Shift+no data
Hyper-Threading Technology+no data
Idle States+no data
Thermal Monitoring+-
Flex Memory Access+no data
Turbo Boost Max 3.0+no data
Precision Boost 2no data+
Deep Learning Boost+-

Security technologies

Core i9-11900KB and Ryzen 9 7945HX3D technologies aimed at improving security, for example, by protecting against hacks.

TXT+no data
EDB+no data
Secure Key+no data
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-11900KB and Ryzen 9 7945HX3D are enumerated here.

AMD-V-+
VT-d+no data
VT-x+no data
EPT+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-11900KB and Ryzen 9 7945HX3D. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR5-5200
Maximum memory size128 GBno data
Max memory channels2no data
Maximum memory bandwidth51.2 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel UHD Graphics for 11th Gen Intel ProcessorsAMD Radeon 610M (400 - 2200 MHz)
Quick Sync Video+-
Graphics max frequency1.45 GHzno data
Execution Units32no data

Graphics interfaces

Available interfaces and connections of Core i9-11900KB and Ryzen 9 7945HX3D integrated GPUs.

Number of displays supported4no data

Graphics image quality

Maximum display resolutions supported by Core i9-11900KB and Ryzen 9 7945HX3D integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@60Hzno data
Max resolution over eDP4096 x 2304@60Hzno data
Max resolution over DisplayPort7680x4320@60Hzno data

Graphics API support

APIs supported by Core i9-11900KB and Ryzen 9 7945HX3D integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.6no data

Peripherals

Specifications and connection of peripherals supported by Core i9-11900KB and Ryzen 9 7945HX3D.

PCIe version4.05.0
PCI Express lanes2028

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.

i9-11900KB 14.42
Ryzen 9 7945HX3D 36.25
+151%

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.

i9-11900KB 22911
Ryzen 9 7945HX3D 57577
+151%

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

i9-11900KB 9538
+12.5%
Ryzen 9 7945HX3D 8478

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

i9-11900KB 50665
Ryzen 9 7945HX3D 70414
+39%

wPrime 32

wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.

i9-11900KB 3.42
+72.5%
Ryzen 9 7945HX3D 5.9

Cinebench 11.5 64-bit multi-core

Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.

i9-11900KB 22
Ryzen 9 7945HX3D 62
+180%

Cinebench 15 64-bit multi-core

Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.

i9-11900KB 2027
Ryzen 9 7945HX3D 5600
+176%

Cinebench 15 64-bit single-core

Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.

i9-11900KB 247
Ryzen 9 7945HX3D 311
+25.9%

Cinebench 11.5 64-bit single-core

Cinebench R11.5 is an old benchmark by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version loads a single thread with ray tracing to render a glossy room full of crystal spheres and light sources.

i9-11900KB 2.84
Ryzen 9 7945HX3D 3.7
+30.3%

TrueCrypt AES

TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.

i9-11900KB 11.6
Ryzen 9 7945HX3D 23.4
+102%

WinRAR 4.0

WinRAR 4.0 is an outdated version of a popular file archiver. It contains an internal speed test, using 'Best' setting of RAR compression on large chunks of randomly generated data. Its results are measured in kilobytes per second.

i9-11900KB 9584
Ryzen 9 7945HX3D 51122
+433%

Geekbench 5.5 Multi-Core

i9-11900KB 8924
Ryzen 9 7945HX3D 19875
+123%

Blender(-)

i9-11900KB 263
+177%
Ryzen 9 7945HX3D 95

Geekbench 5.5 Single-Core

i9-11900KB 1656
Ryzen 9 7945HX3D 2133
+28.8%

7-Zip Single

i9-11900KB 5979
Ryzen 9 7945HX3D 7573
+26.7%

7-Zip

i9-11900KB 50152
Ryzen 9 7945HX3D 136201
+172%

WebXPRT 3

i9-11900KB 269
Ryzen 9 7945HX3D 480
+78.4%

CrossMark Overall

i9-11900KB 1785
Ryzen 9 7945HX3D 2086
+16.9%

Gaming performance

Pros & cons summary


Performance score 14.42 36.25
Integrated graphics card 5.59 2.86
Physical cores 8 16
Threads 16 32
Chip lithography 10 nm 5 nm
Power consumption (TDP) 65 Watt 55 Watt

i9-11900KB has 95.5% faster integrated GPU.

Ryzen 9 7945HX3D, on the other hand, has a 151.4% higher aggregate performance score, 100% more physical cores and 100% more threads, a 100% more advanced lithography process, and 18.2% lower power consumption.

The Ryzen 9 7945HX3D is our recommended choice as it beats the Core i9-11900KB in performance tests.

Note that Core i9-11900KB is a desktop processor while Ryzen 9 7945HX3D is a notebook one.


Should you still have questions on choice between Core i9-11900KB and Ryzen 9 7945HX3D, 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 i9-11900KB
Core i9-11900KB
AMD Ryzen 9 7945HX3D
Ryzen 9 7945HX3D

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Community ratings

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