AMD Ryzen 7 7840H vs AMD Phenom II X4 945

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CPU comparison with benchmarks


AMD Ryzen 7 7840H CPU1 vs CPU2 AMD Phenom II X4 945
AMD Ryzen 7 7840H AMD Phenom II X4 945

CPU comparison

In this CPU comparison, we compare the AMD Ryzen 7 7840H and the AMD Phenom II X4 945 and use benchmarks to check which processor is faster.

We compare the AMD Ryzen 7 7840H 8 core processor released in Q1/2023 with the AMD Phenom II X4 945 which has 4 CPU cores and was introduced in Q2/2009.
AMD Ryzen 7 (70) Family AMD Phenom II (52)
AMD Ryzen 7040 (21) CPU group AMD Phenom II - 800/900 (23)
6 Generation 4
Phoenix (Zen 4) Architecture Deneb (K10)
Mobile Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Ryzen 7 7840H is a 8 core processor with a clock frequency of 3.80 GHz (5.10 GHz). The processor can compute 16 threads at the same time. The AMD Phenom II X4 945 clocks with 3.00 GHz, has 4 CPU cores and can calculate 4 threads in parallel.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X4 945
8 Cores 4
16 Threads 4
normal Core architecture normal
Yes Hyperthreading No
No Overclocking ? Yes
3.80 GHz Frequency 3.00 GHz
5.10 GHz Turbo Frequency (1 Core) --
4.25 GHz Turbo Frequency (All Cores) --

NPU AI performance

The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X4 945
AMD Ryzen™ AI AI hardware --
AMD dedicated AI XDNA Technology AI specifications --
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

AMD Radeon 780M GPU no iGPU
0.80 GHz GPU frequency --
2.70 GHz GPU (Turbo) --
3 GPU Generation --
4 nm Technology
4 Max. displays
12 Compute units --
768 Shader --
Yes Hardware Raytracing No
AMD FSR Frame Generation No
32 GB Max. GPU Memory --
12 DirectX Version --

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

AMD Radeon 780M GPU no iGPU
Decode / Encode Codec h265 / HEVC (8 bit) No
Decode / Encode Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 No
Decode Codec VP9 No
Decode Codec VP8 No
Decode / Encode Codec AV1 No
Decode Codec AVC No
Decode Codec VC-1 No
Decode / Encode Codec JPEG No

Memory & PCIe

Up to 256 GB of memory in a maximum of 2 memory channels is supported by the AMD Ryzen 7 7840H, while the AMD Phenom II X4 945 supports a maximum of GB of memory with a maximum memory bandwidth of 21.3 GB/s enabled.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X4 945
DDR5-4800, DDR5-5600, LPDDR5-6400, LPDDR5X-7500 Memory DDR3-1333, DDR2-1066
256 GB Max. Memory
2 (Dual Channel) Memory channels 2 (Dual Channel)
120.0 GB/s Max. Bandwidth 21.3 GB/s
Yes ECC No
8.00 MB L2 Cache --
16.00 MB L3 Cache 6.00 MB
4.0 PCIe version --
20 PCIe lanes --
39.4 GB/s PCIe Bandwidth --

Thermal Management

The AMD Ryzen 7 7840H has a TDP of 54 W. The TDP of the AMD Phenom II X4 945 is 125 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X4 945
54 W TDP (PL1 / PBP) 125 W
-- TDP (PL2) --
60 W TDP up --
35 W TDP down --
100 °C Tjunction max. --

Technical details

The AMD Ryzen 7 7840H has 24.00 MB cache and is manufactured in 4 nm. The cache of AMD Phenom II X4 945 is at 6.00 MB. The processor is manufactured in 45 nm.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X4 945
4 nm Technology 45 nm
Monolithic Chip design Unknown
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 ISA extensions SSE3, SSE4a
FP8 Socket AM3
AMD-V, SVM Virtualization AMD-V
Yes AES-NI No
Windows 10, Windows 11, Linux Operating systems Windows 10, Linux
Q1/2023 Release date Q2/2009
-- Release price --
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Rate these processors

Here you can rate the AMD Ryzen 7 7840H to help other visitors make their purchasing decisions. The average rating is 4.7 stars (32 ratings). Rate now:
Here you can rate the AMD Phenom II X4 945 to help other visitors make their purchasing decisions. The average rating is 3.0 stars (3 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
AMD Ryzen 7 7840H (100%)
AMD Phenom II X4 945 (22%)
⌀ Multi core performance in 3 CPU benchmarks
AMD Ryzen 7 7840H (100%)
AMD Phenom II X4 945 (11%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz
1857 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
403 (22%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz
11334 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
1343 (12%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz
28412 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
3740 (13%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 3.80 GHz
6744 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
564 (8%)

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz
1757 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz
15930 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz
2456 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz
12135 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz
0 (0%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
168 (100%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz
0 (0%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
606 (100%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
AMD Radeon 780M @ 2.70 GHz
4201 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
@ 0.00 GHz
0 (0%)

CPU-Z Benchmark 17 (Single-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz
624 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 5.10 GHz
0 (0%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
79 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 4.25 GHz
0 (0%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
304 (100%)

AI performance (NPU)

The performance values of the processor's AI unit. The isolated NPU performance is given here, the total AI performance (NPU+CPU+iGPU) can be higher.

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. The performance is given in the number (trillions) of arithmetic operations per second (TOPS).
AMD Ryzen 7 7840H AMD Ryzen 7 7840H
8C 16T @ 3.80 GHz
10 (100%)
AMD Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)

Devices using this processor

AMD Ryzen 7 7840H AMD Phenom II X4 945
Unknown Unknown

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