AMD Athlon II X4 645 vs AMD Phenom II X3 B73

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CPU comparison with benchmarks


AMD Athlon II X4 645 CPU1 vs CPU2 AMD Phenom II X3 B73
AMD Athlon II X4 645 AMD Phenom II X3 B73

CPU comparison

AMD Athlon II X4 645 or AMD Phenom II X3 B73 - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The AMD Athlon II X4 645 has 4 cores with 4 threads and clocks with a maximum frequency of 3.10 GHz. Up to 16 GB of memory is supported in 2 memory channels. The AMD Athlon II X4 645 was released in Q3/2010.

The AMD Phenom II X3 B73 has 3 cores with 3 threads and clocks with a maximum frequency of 2.80 GHz. The CPU supports up to GB of memory in 2 memory channels. The AMD Phenom II X3 B73 was released in Q3/2009.
AMD Athlon II (52) Family AMD Phenom II (52)
AMD Athlon II X4 (Propus) (10) CPU group AMD Phenom II - 700 (9)
1 Generation 3
Propus Architecture Heka (K10)
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Athlon II X4 645 is a 4 core processor with a clock frequency of 3.10 GHz. The AMD Phenom II X3 B73 has 3 CPU cores with a clock frequency of 2.80 GHz.

AMD Athlon II X4 645 Characteristic AMD Phenom II X3 B73
4 Cores 3
4 Threads 3
normal Core architecture normal
No Hyperthreading No
No Overclocking ? Yes
3.10 GHz Frequency 2.80 GHz
-- Turbo Frequency (1 Core) --
-- 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 Athlon II X4 645 Characteristic AMD Phenom II X3 B73
-- AI hardware --
-- AI specifications --

Internal Graphics

The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.

no iGPU GPU no iGPU
GPU frequency --
-- GPU (Turbo) --
-- GPU Generation --
Technology
Max. displays
-- Compute units --
-- Shader --
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory --
-- 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.

no iGPU GPU no iGPU
No Codec h265 / HEVC (8 bit) No
No Codec h265 / HEVC (10 bit) No
No Codec h264 No
No Codec VP9 No
No Codec VP8 No
No Codec AV1 No
No Codec AVC No
No Codec VC-1 No
No Codec JPEG No

Memory & PCIe

The AMD Athlon II X4 645 supports a maximum of 16 GB of memory in 2 memory channels. The AMD Phenom II X3 B73 can connect up to GB of memory in 2 memory channels.

AMD Athlon II X4 645 Characteristic AMD Phenom II X3 B73
DDR3-1333 Memory DDR3-1333, DDR2-1066
16 GB Max. Memory
2 (Dual Channel) Memory channels 2 (Dual Channel)
21.3 GB/s Max. Bandwidth 21.3 GB/s
No ECC No
2.00 MB L2 Cache --
-- L3 Cache 6.00 MB
2.0 PCIe version --
-- PCIe lanes --
-- PCIe Bandwidth --

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The AMD Athlon II X4 645 has a TDP of 95 W, that of the AMD Phenom II X3 B73 is 95 W.

AMD Athlon II X4 645 Characteristic AMD Phenom II X3 B73
95 W TDP (PL1 / PBP) 95 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The AMD Athlon II X4 645 has a 2.00 MB cache, while the AMD Phenom II X3 B73 cache has a total of 6.00 MB.

AMD Athlon II X4 645 Characteristic AMD Phenom II X3 B73
45 nm Technology 45 nm
Unknown Chip design Unknown
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
MMX, 3DNow!, SSE3, SSE4a ISA extensions SSE3, SSE4a
AM3 Socket AM3
AMD-V Virtualization AMD-V
No AES-NI No
Windows 10, Linux Operating systems Windows 10, Linux
Q3/2010 Release date Q3/2009
-- Release price --
show more data show more data


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Average performance in benchmarks

⌀ Single core performance in 0 CPU benchmarks
AMD Athlon II X4 645 (0%)
AMD Phenom II X3 B73 (0%)
⌀ Multi core performance in 1 CPU benchmarks
AMD Athlon II X4 645 (81%)
AMD Phenom II X3 B73 (100%)

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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
2274 (81%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 GHz
2811 (100%)

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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
402 (100%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
1520 (100%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
399 (100%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
1374 (100%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
157 (100%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 GHz
0 (0%)

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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
601 (100%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
575 (100%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
0 (0%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 GHz
74 (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 Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
0 (0%)
AMD Phenom II X3 B73 AMD Phenom II X3 B73
3C 3T @ 2.80 GHz
213 (100%)

Devices using this processor

AMD Athlon II X4 645 AMD Phenom II X3 B73
Unknown Unknown

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