Ryzen 7 8840U vs Ryzen 9 7945HX

Aggregate performance score

Ryzen 9 7945HX
2023
16 cores / 32 threads, 55 Watt
34.45
+129%
Ryzen 7 8840U
2023
8 cores / 16 threads, 28 Watt
15.06

Ryzen 9 7945HX outperforms Ryzen 7 8840U by a whopping 129% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 9 7945HX and Ryzen 7 8840U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking110464
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
Power efficiency59.2850.90
Architecture codenameDragon Range-HX (Zen 4) (2023−2024)Hawk Point-U (Zen 4) (2023)
Release date4 January 2023 (1 year ago)6 December 2023 (less than a year ago)

Detailed specifications

Ryzen 9 7945HX and Ryzen 7 8840U 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 cores16 (Hexadeca-Core)8 (Octa-Core)
Threads3216
Base clock speed2.5 GHz3.3 GHz
Boost clock speed5.4 GHz5.1 GHz
L1 cache64K (per core)64 KB (per core)
L2 cache1 MB (per core)1 MB (per core)
L3 cache64 MB (shared)16 MB (shared)
Chip lithographyCCD = 5 nm, I/O = 6 nm4 nm
Die size2x 71 mm2178 mm2
Maximum core temperature100 °C100 °C
Number of transistors13,140 million25,000 million
64 bit support++
Windows 11 compatibility+no data
Unlocked multiplier+-

Compatibility

Information on Ryzen 9 7945HX and Ryzen 7 8840U 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
SocketFL1FP8
Power consumption (TDP)55 Watt28 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 7945HX and Ryzen 7 8840U. You'll probably need this information if you require some particular technology.

Instruction set extensionsMMX, 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, SMERyzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3
AES-NI++
FMA+-
AVX++
Precision Boost 2++

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 7945HX and Ryzen 7 8840U are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7945HX and Ryzen 7 8840U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR5DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
AMD Radeon 610MAMD Radeon 780M

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 7945HX and Ryzen 7 8840U.

PCIe version5.04.0
PCI Express lanes2820

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 7945HX 34.45
+129%
Ryzen 7 8840U 15.06

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 7945HX 54718
+129%
Ryzen 7 8840U 23921

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 7945HX 2734
+22.9%
Ryzen 7 8840U 2224

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 7945HX 15891
+68.9%
Ryzen 7 8840U 9406

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 7945HX 8462
+14.6%
Ryzen 7 8840U 7381

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 7945HX 71611
+73.4%
Ryzen 7 8840U 41306

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 7945HX 19820
+39.1%
Ryzen 7 8840U 14245

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 7945HX 1.99
+64.8%
Ryzen 7 8840U 3.28

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 7945HX 62
+156%
Ryzen 7 8840U 24

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 7945HX 5521
+210%
Ryzen 7 8840U 1782

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 7945HX 308
+16%
Ryzen 7 8840U 266

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 7945HX 3.65
+13.4%
Ryzen 7 8840U 3.22

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 7945HX 27.7
+141%
Ryzen 7 8840U 11.5

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 7945HX 236
+98.5%
Ryzen 7 8840U 119

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 7945HX 369
+38.1%
Ryzen 7 8840U 267

Geekbench 5.5 Multi-Core

Ryzen 9 7945HX 19802
+114%
Ryzen 7 8840U 9258

Blender(-)

Ryzen 9 7945HX 94
Ryzen 7 8840U 283
+201%

Geekbench 5.5 Single-Core

Ryzen 9 7945HX 2124
+13%
Ryzen 7 8840U 1879

7-Zip Single

Ryzen 9 7945HX 7381
+24.7%
Ryzen 7 8840U 5921

7-Zip

Ryzen 9 7945HX 140471
+180%
Ryzen 7 8840U 50223

WebXPRT 3

Ryzen 9 7945HX 351
+16.2%
Ryzen 7 8840U 302

Gaming performance

Pros & cons summary


Performance score 34.45 15.06
Integrated graphics card 2.85 18.30
Recency 4 January 2023 6 December 2023
Physical cores 16 8
Threads 32 16
Power consumption (TDP) 55 Watt 28 Watt

Ryzen 9 7945HX has a 128.8% higher aggregate performance score, and 100% more physical cores and 100% more threads.

Ryzen 7 8840U, on the other hand, has 542.1% faster integrated GPU, an age advantage of 11 months, and 96.4% lower power consumption.

The Ryzen 9 7945HX is our recommended choice as it beats the Ryzen 7 8840U in performance tests.


Should you still have questions on choice between Ryzen 9 7945HX and Ryzen 7 8840U, 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.


AMD Ryzen 9 7945HX
Ryzen 9 7945HX
AMD Ryzen 7 8840U
Ryzen 7 8840U

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


4.6 627 votes

Rate Ryzen 9 7945HX on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4.2 160 votes

Rate Ryzen 7 8840U on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Ryzen 9 7945HX or Ryzen 7 8840U, agree or disagree with our judgements, or report an error or mismatch.