Ryzen 9 7945HX vs Ryzen 9 7900X

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Aggregate performance score

Ryzen 9 7900X
2022
12 cores / 24 threads, 170 Watt
32.51
Ryzen 9 7945HX
2023
16 cores / 32 threads, 55 Watt
34.42
+5.9%

Ryzen 9 7945HX outperforms Ryzen 9 7900X by a small 6% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 9 7900X and Ryzen 9 7945HX processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking124111
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorLaptop
Power efficiency18.1059.23
Architecture codenameRaphael (Zen4) (2022−2023)Dragon Range-HX (Zen 4) (2023−2024)
Release date27 September 2022 (2 years ago)4 January 2023 (1 year ago)

Detailed specifications

Ryzen 9 7900X and Ryzen 9 7945HX 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 cores12 (Dodeca-Core)16 (Hexadeca-Core)
Threads2432
Base clock speed4.7 GHz2.5 GHz
Boost clock speed5.6 GHz5.4 GHz
L1 cache64K (per core)64K (per core)
L2 cache1 MB (per core)1 MB (per core)
L3 cache64 MB (shared)64 MB (shared)
Chip lithography5 nmCCD = 5 nm, I/O = 6 nm
Die size2x 70 (CCD) mm2 + 122 (I/O) mm22x 71 mm2
Maximum core temperature95 °C100 °C
Maximum case temperature (TCase)47 °Cno data
Number of transistorsCCD: 6,5 Mrd + IOD: 3,4 Mrd Million13,140 million
64 bit support++
Windows 11 compatibility++
Unlocked multiplier++

Compatibility

Information on Ryzen 9 7900X and Ryzen 9 7945HX 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
SocketAM5FL1
Power consumption (TDP)170 Watt55 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 7900X and Ryzen 9 7945HX. You'll probably need this information if you require some particular technology.

Instruction set extensions5 nm (CCD), 6 nm (I/O) nm, 0.650 - 1.475VMMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME
AES-NI++
FMA-+
AVX++
Precision Boost 2++

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 7900X and Ryzen 9 7945HX are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7900X and Ryzen 9 7945HX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR5-5200DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
AMD Radeon Graphics (Ryzen 7000)AMD Radeon 610M (400 - 2200 MHz)

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 7900X and Ryzen 9 7945HX.

PCIe version5.05.0
PCI Express lanes2428

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.

Ryzen 9 7900X 32.51
Ryzen 9 7945HX 34.42
+5.9%

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.

Ryzen 9 7900X 51640
Ryzen 9 7945HX 54668
+5.9%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Ryzen 9 7900X 2953
+7.9%
Ryzen 9 7945HX 2736

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Ryzen 9 7900X 17921
+12.7%
Ryzen 9 7945HX 15895

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.

Ryzen 9 7900X 8623
+1.9%
Ryzen 9 7945HX 8462

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.

Ryzen 9 7900X 68580
Ryzen 9 7945HX 71611
+4.4%

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

Ryzen 9 7900X 21284
+7.4%
Ryzen 9 7945HX 19820

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.

Ryzen 9 7900X 1.8
+10.6%
Ryzen 9 7945HX 1.99

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.

Ryzen 9 7900X 55
Ryzen 9 7945HX 62
+12.6%

Cinebench 15 64-bit multi-core

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

Ryzen 9 7900X 4821
Ryzen 9 7945HX 5521
+14.5%

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.

Ryzen 9 7900X 323
+4.9%
Ryzen 9 7945HX 308

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.

Ryzen 9 7900X 3.83
+4.9%
Ryzen 9 7945HX 3.65

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.

Ryzen 9 7900X 14.8
Ryzen 9 7945HX 27.7
+87.2%

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.

Ryzen 9 7900X 17225
+18.5%
Ryzen 9 7945HX 14532

x264 encoding pass 2

x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.  

Ryzen 9 7900X 241
+2.3%
Ryzen 9 7945HX 236

x264 encoding pass 1

x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.  

Ryzen 9 7900X 376
+2%
Ryzen 9 7945HX 369

Geekbench 5.5 Multi-Core

Ryzen 9 7900X 20668
+4.4%
Ryzen 9 7945HX 19802

Blender(-)

Ryzen 9 7900X 106
+12.8%
Ryzen 9 7945HX 94

Geekbench 5.5 Single-Core

Ryzen 9 7900X 2294
+8%
Ryzen 9 7945HX 2124

7-Zip Single

Ryzen 9 7900X 8269
+12%
Ryzen 9 7945HX 7381

7-Zip

Ryzen 9 7900X 127195
Ryzen 9 7945HX 140471
+10.4%

WebXPRT 3

Ryzen 9 7900X 383
+9.1%
Ryzen 9 7945HX 351

CrossMark Overall

Ryzen 9 7900X 2370
+15.2%
Ryzen 9 7945HX 2058

WebXPRT 4 Overall

Ryzen 9 7900X 305
+4.5%
Ryzen 9 7945HX 292

Blender v3.3 Classroom CPU(-)

Ryzen 9 7900X 166
+11.4%
Ryzen 9 7945HX 149

Gaming performance

Pros & cons summary


Performance score 32.51 34.42
Integrated graphics card 4.43 2.85
Recency 27 September 2022 4 January 2023
Physical cores 12 16
Threads 24 32
Power consumption (TDP) 170 Watt 55 Watt

Ryzen 9 7900X has 55.4% faster integrated GPU.

Ryzen 9 7945HX, on the other hand, has a 5.9% higher aggregate performance score, an age advantage of 3 months, 33.3% more physical cores and 33.3% more threads, and 209.1% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Ryzen 9 7900X and Ryzen 9 7945HX.

Note that Ryzen 9 7900X is a desktop processor while Ryzen 9 7945HX is a notebook one.


Should you still have questions on choice between Ryzen 9 7900X and Ryzen 9 7945HX, ask them in Comments section, and we shall answer.

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AMD Ryzen 9 7900X
Ryzen 9 7900X
AMD Ryzen 9 7945HX
Ryzen 9 7945HX

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