77points

AMD Epyc 7642

29points

AMD Phenom II X4 975

AMD Epyc 7642
Comparison winner
AMD Phenom II X4 975
vs
vs

28 facts in comparison

AMD Epyc 7642 vs AMD Phenom II X4 975

AMD Epyc 7642
AMD Phenom II X4 975

Why is AMD Epyc 7642 better than AMD Phenom II X4 975?

  • 7.67x faster CPU speed
    ?

    48 x 2.3GHzvs4 x 3.6GHz
  • 92 more CPU threads
    ?

    96vs4
  • 1867MHz higher ram speed
    ?

    3200MHzvs1333MHz
  • 22MB bigger L2 cache
    ?

    24MBvs2MB
  • 250MB bigger L3 cache
    ?

    256MBvs6MB
  • 31nm smaller semiconductor size
    ?

    14nmvs45nm
  • 2560KB bigger L1 cache
    ?

    3072KBvs512KB
  • 169.4GB/s more memory bandwidth
    ?

    190.7GB/svs21.3GB/s

Why is AMD Phenom II X4 975 better than AMD Epyc 7642?

  • 100W lower TDP
    ?

    125Wvs225W
  • Has an unlocked multiplier
    ?
  • Has dynamic frequency scaling
    ?

Price comparison

General info

1.Supports 64-bit
AMD Epyc 7642
AMD Phenom II X4 975
A 32-bit operating system can only support up to 4GB of RAM. 64-bit allows more than 4GB, giving increased performance. It also allows you to run 64-bit apps.
2.semiconductor size

14nm

45nm

Small semiconductors provide better performance and reduced power consumption. Chipsets with a higher number of transistors, semiconductor components of electronic devices, offer more computational power. A small form factor allows more transistors to fit on a chip, therefore increasing its performance.
3.Thermal Design Power (TDP)

225W

125W

The thermal design power (TDP) is the maximum amount of power the cooling system needs to dissipate. A lower TDP typically means that it consumes less power.
4.PCI Express (PCIe) version

4

2

Peripheral Component Interconnect Express (PCIe) is a high-speed interface standard for connecting components, such as graphics cards and SSDs, to a motherboard. Newer versions can support more bandwidth and deliver better performance.
5.Has integrated graphics
AMD Epyc 7642
AMD Phenom II X4 975
With integrated graphics you don’t need to buy a separate graphics card.

Performance

1.CPU speed

48 x 2.3GHz

4 x 3.6GHz

The CPU speed indicates how many processing cycles per second can be executed by a CPU, considering all of its cores (processing units). It is calculated by adding the clock rates of each core or, in the case of multi-core processors employing different microarchitectures, of each group of cores.
2.CPU threads

96

4

More threads result in faster performance and better multitasking.
3.L2 cache

24MB

2MB

A larger L2 cache results in faster CPU and system-wide performance.
4.L3 cache

256MB

6MB

A larger L3 cache results in faster CPU and system-wide performance.
5.L1 cache

3072KB

512KB

A larger L1 cache results in faster CPU and system-wide performance.
6.L2 core

0.5MB/core

0.5MB/core

More data can be stored in the L2 cache for access by each core of the CPU.

Memory

1.RAM speed

3200MHz

1333MHz

It can support faster memory, which will give quicker system performance.
2.maximum memory bandwidth

190.7GB/s

21.3GB/s

This is the maximum rate that data can be read from or stored into memory.
3.memory channels

8

2

More memory channels increases the speed of data transfer between the memory and the CPU.
4.Supports ECC memory
AMD Epyc 7642
AMD Phenom II X4 975
Error-correcting code memory can detect and correct data corruption. It is used when is it essential to avoid corruption, such as scientific computing or when running a server.

Features

1.Has AES
AMD Epyc 7642
AMD Phenom II X4 975
AES is used to speed up encryption and decryption.
2.Has dynamic frequency scaling
AMD Epyc 7642
AMD Phenom II X4 975
Dynamic frequency scaling is a technology that allows the processor to conserve power and reduce noise when it is under a light load.
3.Supports hardware-assisted virtualization
AMD Epyc 7642
AMD Phenom II X4 975
It is easier to obtain better performance when using virtualization if it is hardware-assisted.
4.SSE version

4.2

4

SSE is used to speed up multimedia tasks such as editing an image or adjusting audio volume. Each new version contains new instructions and improvements.
5.Has AVX
AMD Epyc 7642
AMD Phenom II X4 975
AVX is used to help speed up calculations in multimedia, scientific and financial apps, as well as improving Linux RAID software performance.
6.Has MMX
AMD Epyc 7642
AMD Phenom II X4 975
MMX is used to speed up tasks such as adjusting the contrast of an image or adjusting volume.

Follow Versus on Youtube

Check out our channel

Which are the best CPUs?

Show all
This page is currently only available in English.