Intel Xeon Gold 6338 vs AMD EPYC 7643

Price now 9321$
Games supported 100%
  • Interface
  • Core clock speed
  • Max video memory
  • Memory type
  • Memory clock speed
  • Maximum resolution
Intel Xeon Gold 6338
Intel Xeon Gold 6338
  • Interface
  • Core clock speed
  • Max video memory
  • Memory type
  • Memory clock speed
  • Maximum resolution
Price now 2000$
Games supported 100%

General info

Comparing EPYC 7643 and Xeon Gold 6338 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance rating1315
Value for money1.5819.40
Market segmentServerServer
SeriesAMD EPYCno data
Architecture codenameMilan (2021)no data
Release date12 January 2021 (2 years old)1 April 2021 (1 year old)
Launch price (MSRP)$4,995no data
Current price$9321 (1.9x MSRP)$2000
Value for money

Performance per price, higher is better.

  • 0
  • 50
  • 100
  • 0
  • 50
  • 100

Technical specs

EPYC 7643 and Xeon Gold 6338 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores48 (Octatetraconta-Core)32 (Dotriaconta-Core)
Base clock speed2.3 GHz2 GHz
Boost clock speed3.6 GHz3.2 GHz
L1 cache96K (per core)no data
L2 cache512K (per core)no data
L3 cache256 MB (shared)48 MB
Chip lithography7 nm+10 nm
Maximum core temperatureno data81 °C
64 bit support+-
Windows 11 compatibility++
Unlocked multiplier+-


Information on EPYC 7643 and Xeon Gold 6338 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration2no data
Thermal design power (TDP)225 Watt205 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7643 and Xeon Gold 6338. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512
AVX+no data
Speed Shiftno data+
Turbo Boost Technologyno data2.0
Hyper-Threading Technologyno data+
TSXno data+

Security technologies

EPYC 7643 and Xeon Gold 6338 technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDBno data+
SGXno dataYes with Intel® SPS

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7643 and Xeon Gold 6338 are enumerated here.

AMD-V+no data
VT-dno data+
VT-xno data+
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7643 and Xeon Gold 6338. Depending on the motherboards, higher memory frequencies may be supported.

Supported memory typesDDR4-3200DDR4-3200
Maximum memory size4 TiB6 TB
Max memory channelsno data8
Maximum memory bandwidth204.795 GB/sno data
ECC memory supportno data+


Specifications and connection of peripherals supported by EPYC 7643 and Xeon Gold 6338.

PCIe version4.04.0
PCI Express lanesno data64

Benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Overall score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

EPYC 7643 60.66
Xeon Gold 6338 58.41
  • Passmark


Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Benchmark coverage: 67%

EPYC 7643 76455
Xeon Gold 6338 73622

EPYC 7643 outperforms Xeon Gold 6338 by 4% in Passmark.

Gaming performance

Advantages and disadvantages

Performance rating 60.66 58.41
Recency 12 January 2021 1 April 2021
Boost clock speed 3600 0
Base clock speed 2300 0
Chip lithography 7 nm 10 nm
Thermal design power (TDP) 225 Watt 205 Watt

Technical City couldn't decide between

EPYC 7643


Intel Xeon Gold 6338
Xeon Gold 6338

The differences in performance seem too small.

Should you still have questions on choice between EPYC 7643 and Xeon Gold 6338, ask them in Comments section, and we shall answer.

Cast your vote

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

User rating

Here you can see how users rate the processors, as well as rate them yourself.

1.2 228 votes

Rate AMD EPYC 7643 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.8 11 votes

Rate Intel Xeon Gold 6338 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions and comments

Here you can ask a question about EPYC 7643 or Xeon Gold 6338, agree or disagree with our judgements, or report an error or mismatch.