AMD Phenom II X4 905e vs AMD EPYC 7451

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CPU comparison with benchmarks


AMD Phenom II X4 905e CPU1 vs CPU2 AMD EPYC 7451
AMD Phenom II X4 905e AMD EPYC 7451

CPU comparison

In this CPU comparison, we compare the AMD Phenom II X4 905e and the AMD EPYC 7451 and use benchmarks to check which processor is faster.

We compare the AMD Phenom II X4 905e 4 core processor released in Q1/2009 with the AMD EPYC 7451 which has 24 CPU cores and was introduced in Q3/2017.
AMD Phenom II (52) Family AMD EPYC (129)
AMD Phenom II - 800/900 (23) CPU group AMD EPYC 7001 (12)
4 Generation 1
Deneb (K10) Architecture Naples (Zen)
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Phenom II X4 905e is a 4 core processor with a clock frequency of 2.50 GHz. The processor can compute 4 threads at the same time. The AMD EPYC 7451 clocks with 2.30 GHz (3.20 GHz), has 24 CPU cores and can calculate 48 threads in parallel.

AMD Phenom II X4 905e Characteristic AMD EPYC 7451
4 Cores 24
4 Threads 48
normal Core architecture normal
No Hyperthreading Yes
Yes Overclocking ? No
2.50 GHz Frequency 2.30 GHz
-- Turbo Frequency (1 Core) 3.20 GHz
-- Turbo Frequency (All Cores) 2.90 GHz

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 Phenom II X4 905e Characteristic AMD EPYC 7451
-- AI hardware --
-- 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.

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

Up to GB of memory in a maximum of 2 memory channels is supported by the AMD Phenom II X4 905e, while the AMD EPYC 7451 supports a maximum of GB of memory with a maximum memory bandwidth of 170.6 GB/s enabled.

AMD Phenom II X4 905e Characteristic AMD EPYC 7451
DDR3-1333, DDR2-1066 Memory DDR4-2666
Max. Memory
2 (Dual Channel) Memory channels 8 (Octa Channel)
21.3 GB/s Max. Bandwidth 170.6 GB/s
No ECC Yes
-- L2 Cache --
6.00 MB L3 Cache 64.00 MB
-- PCIe version 3.0
-- PCIe lanes 128
-- PCIe Bandwidth 126.1 GB/s

Thermal Management

The AMD Phenom II X4 905e has a TDP of 65 W. The TDP of the AMD EPYC 7451 is 180 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD Phenom II X4 905e Characteristic AMD EPYC 7451
65 W TDP (PL1 / PBP) 180 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The AMD Phenom II X4 905e has 6.00 MB cache and is manufactured in 45 nm. The cache of AMD EPYC 7451 is at 64.00 MB. The processor is manufactured in 14 nm.

AMD Phenom II X4 905e Characteristic AMD EPYC 7451
45 nm Technology 14 nm
Unknown Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE3, SSE4a ISA extensions SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
AM3 Socket SP3
AMD-V Virtualization AMD-V, SVM
No AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Linux
Q1/2009 Release date Q3/2017
-- Release price 2400 $
show more data show more data


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Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
AMD Phenom II X4 905e (47%)
AMD EPYC 7451 (100%)
⌀ Multi core performance in 2 CPU benchmarks
AMD Phenom II X4 905e (12%)
AMD EPYC 7451 (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 Phenom II X4 905e AMD Phenom II X4 905e
4C 4T @ 2.50 GHz
3115 (15%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
20479 (100%)

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 Phenom II X4 905e AMD Phenom II X4 905e
4C 4T @ 2.50 GHz
66 (47%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
141 (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 Phenom II X4 905e AMD Phenom II X4 905e
4C 4T @ 2.50 GHz
253 (8%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
3277 (100%)

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 Phenom II X4 905e AMD Phenom II X4 905e
4C 4T @ 2.50 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
884 (100%)

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 Phenom II X4 905e AMD Phenom II X4 905e
4C 4T @ 2.50 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
14671 (100%)

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 Phenom II X4 905e AMD Phenom II X4 905e
4C 4T @ 2.50 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 3.20 GHz
317 (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 Phenom II X4 905e AMD Phenom II X4 905e
4C 4T @ 2.50 GHz
0 (0%)
AMD EPYC 7451 AMD EPYC 7451
24C 48T @ 2.90 GHz
6768 (100%)

Devices using this processor

AMD Phenom II X4 905e AMD EPYC 7451
Unknown Unknown

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