AMD Phenom II X4 945 vs AMD EPYC 7642

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CPU comparison with benchmarks


AMD Phenom II X4 945 CPU1 vs CPU2 AMD EPYC 7642
AMD Phenom II X4 945 AMD EPYC 7642

CPU comparison

In this CPU comparison, we compare the AMD Phenom II X4 945 and the AMD EPYC 7642 and use benchmarks to check which processor is faster.

We compare the AMD Phenom II X4 945 4 core processor released in Q2/2009 with the AMD EPYC 7642 which has 48 CPU cores and was introduced in Q3/2019.
AMD Phenom II (52) Family AMD EPYC (129)
AMD Phenom II - 800/900 (23) CPU group AMD EPYC 7002 (24)
4 Generation 2
Deneb (K10) Architecture Rome (Zen 2)
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor AMD EPYC 7643

CPU Cores and Base Frequency

The AMD Phenom II X4 945 is a 4 core processor with a clock frequency of 3.00 GHz. The processor can compute 4 threads at the same time. The AMD EPYC 7642 clocks with 2.30 GHz (3.30 GHz), has 48 CPU cores and can calculate 96 threads in parallel.

AMD Phenom II X4 945 Characteristic AMD EPYC 7642
4 Cores 48
4 Threads 96
normal Core architecture normal
No Hyperthreading Yes
Yes Overclocking ? No
3.00 GHz Frequency 2.30 GHz
-- Turbo Frequency (1 Core) 3.30 GHz
-- Turbo Frequency (All Cores) 2.80 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 945 Characteristic AMD EPYC 7642
-- 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 945, while the AMD EPYC 7642 supports a maximum of GB of memory with a maximum memory bandwidth of 51.2 GB/s enabled.

AMD Phenom II X4 945 Characteristic AMD EPYC 7642
DDR3-1333, DDR2-1066 Memory DDR4-3200
Max. Memory
2 (Dual Channel) Memory channels 8 (Octa Channel)
21.3 GB/s Max. Bandwidth 51.2 GB/s
No ECC Yes
-- L2 Cache --
6.00 MB L3 Cache 256.00 MB
-- PCIe version 4.0
-- PCIe lanes 128
-- PCIe Bandwidth 252.0 GB/s

Thermal Management

The AMD Phenom II X4 945 has a TDP of 125 W. The TDP of the AMD EPYC 7642 is 225 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD Phenom II X4 945 Characteristic AMD EPYC 7642
125 W TDP (PL1 / PBP) 225 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The AMD Phenom II X4 945 has 6.00 MB cache and is manufactured in 45 nm. The cache of AMD EPYC 7642 is at 256.00 MB. The processor is manufactured in 7 nm.

AMD Phenom II X4 945 Characteristic AMD EPYC 7642
45 nm Technology 7 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
Q2/2009 Release date Q3/2019
-- Release price 8000 $
show more data show more data


Rate these processors

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:
Here you can rate the AMD EPYC 7642 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 2 CPU benchmarks
AMD Phenom II X4 945 (42%)
AMD EPYC 7642 (100%)
⌀ Multi core performance in 2 CPU benchmarks
AMD Phenom II X4 945 (5%)
AMD EPYC 7642 (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 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
403 (38%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 3.30 GHz
1047 (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 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
1343 (4%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 2.80 GHz
33846 (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 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
168 (45%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 3.30 GHz
377 (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 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
3740 (6%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 2.80 GHz
61574 (100%)

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 Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 3.30 GHz
1334 (100%)

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 Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
0 (0%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 2.80 GHz
15647 (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 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
606 (100%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 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 Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
564 (100%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 2.30 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 Phenom II X4 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
79 (100%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 3.30 GHz
0 (0%)

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 945 AMD Phenom II X4 945
4C 4T @ 3.00 GHz
304 (100%)
AMD EPYC 7642 AMD EPYC 7642
48C 96T @ 2.80 GHz
0 (0%)

Devices using this processor

AMD Phenom II X4 945 AMD EPYC 7642
Unknown Unknown

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