Intel Core i9-9900X vs AMD Epyc 7251. Specifications, performance, tests

Background information about the processors being compared, series, generation and market segment.

• Segment
  Desktop / Server Desktop / Server
• Family
  Intel Core i9 AMD Epyc
• Generation
  9 1
• CPU group
  Intel Core i 9000X AMD Epyc 7001

Basic parameters such as number of cores, number of threads, base and turbo frequency, and cache size. These parameters indirectly tell about the speed of the processor, the higher they are the better.

• Frequency
  3.50 GHz 2.10 GHz
• CPU Cores
  10 8
• Turbo (1 Core)
  4.50 GHz 2.90 GHz
• CPU Threads
  20 16
• Hyperthreading
  Yes Yes
• Overclocking
  Yes No
• Core architecture
  normal normal

Internal Graphics does not affect the performance of the CPU, performs the work of the graphics card in its absence or on mobile devices.

• GPU name
  no iGPU no iGPU
• GPU (Turbo)
  No turbo No turbo

Built-in codecs used to encode and decode content. Significantly speeds up the required operations.

• h265 / HEVC (8 bit)
  No No
• h265 / HEVC (10 bit)
  No No
• h264
  No No
• VP9
  No No
• VP8
  No No
• AV1
  No No
• AVC
  No No
• VC-1
  No No
• JPEG
  No No

Types, channel quantity of RAM supported by AMD Epyc 7251 and Intel Core i9-9900X. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR4-2666 DDR4-2666
• Max. Memory
  128 GB
• ECC
  No Yes
• Memory channels
  4 8
• PCIe version
  3.0 3.0
• PCIe lanes
  44 128

• AES-NI
  Yes Yes

Compare the TDP requirements of TDP Intel Core i9-9900X and AMD Epyc 7251 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  165 W 120 W
• Tjunction max.
  92 °C --

Architecture, interfaces, additional instructions supported by Intel Core i9-9900X and Intel Core i9-9900X, virtual machine technologies and process technology.

• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• Virtualization
  VT-x, VT-x EPT, VT-d AMD-V, SVM
• ISA extensions
  SSE4.1, SSE4.2, AVX2, AVX-512 SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
• L3-Cache
  19.00 MB 32.00 MB
• Architecture
  Skylake X Refresh Naples (Zen)
• Technology
  14 nm 14 nm
• Socket
  LGA 2066 SP3
• Release date
  Q4/2018 Q3/2017