AMD Ryzen 7 7840H vs AMD Phenom II X2 B55

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CPU comparison with benchmarks


AMD Ryzen 7 7840H CPU1 vs CPU2 AMD Phenom II X2 B55
AMD Ryzen 7 7840H AMD Phenom II X2 B55

CPU comparison

In this CPU comparison, we compare the AMD Ryzen 7 7840H and the AMD Phenom II X2 B55 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 X2 B55 which has 2 CPU cores and was introduced in Q4/2009.
AMD Ryzen 7 (68) Family AMD Phenom II (52)
AMD Ryzen 7040 (21) CPU group AMD Phenom II - 545 (9)
6 Generation 2
Phoenix (Zen 4) Architecture Callisto (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 X2 B55 clocks with 3.00 GHz, has 2 CPU cores and can calculate 2 threads in parallel.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X2 B55
8 Cores 2
16 Threads 2
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) --

Artificial Intelligence and Machine Learning

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. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X2 B55
AMD Ryzen AI AI hardware --
AMD dedicated AI XDNA Technology AI specifications --

Internal Graphics

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 X2 B55 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 X2 B55
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 X2 B55 is 80 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 X2 B55
54 W TDP (PL1 / PBP) 80 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 X2 B55 is at 6.00 MB. The processor is manufactured in 45 nm.

AMD Ryzen 7 7840H Characteristic AMD Phenom II X2 B55
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 Q4/2009
-- Release price --
show more data show more data


Rate these processors

Here you can rate the AMD Ryzen 7 7840H to help other visitors make their purchasing decisions. The average rating is 4.8 stars (27 ratings). Rate now:
Here you can rate the AMD Phenom II X2 B55 to help other visitors make their purchasing decisions. The average rating is 0 stars (0 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 0 CPU benchmarks
AMD Ryzen 7 7840H (0%)
AMD Phenom II X2 B55 (0%)
⌀ Multi core performance in 1 CPU benchmarks
AMD Ryzen 7 7840H (100%)
AMD Phenom II X2 B55 (7%)

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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 3.00 GHz
1931 (7%)

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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 3.00 GHz
0 (0%)

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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 3.00 GHz
0 (0%)

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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 3.00 GHz
0 (0%)

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 X2 B55 AMD Phenom II X2 B55
@ 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 @ 4.25 GHz
624 (100%)
AMD Phenom II X2 B55 AMD Phenom II X2 B55
2C 2T @ 3.00 GHz
0 (0%)

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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 3.00 GHz
152 (100%)

Performance for Artificial Intelligence (AI) and Machine Learning (ML)

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 X2 B55 AMD Phenom II X2 B55
2C 2T @ 3.00 GHz
0 (0%)

Devices using this processor

AMD Ryzen 7 7840H AMD Phenom II X2 B55
Unknown Unknown

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