AMD EPYC 7643 vs EPYC 7702

#ad
Buy
VS

Combined performance score

EPYC 7702
45.49

EPYC 7643 outperforms EPYC 7702 by 9% in our combined benchmark results.

General info

Comparing EPYC 7702 and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking3830
Place by popularitynot in top-100not in top-100
Value for money3.073.51
Market segmentServerServer
SeriesAMD EPYCAMD EPYC
Architecture codenameZen 2 (2019−2020)Milan (2021)
Release date7 August 2019 (4 years old)15 March 2021 (3 years old)
Launch price (MSRP)$6,450$4,995
Current price$8948 (1.4x MSRP)$8748 (1.8x MSRP)
Value for money

Performance per price, higher is better.

EPYC 7643 has 14% better value for money than EPYC 7702.

Technical specs

EPYC 7702 and EPYC 7643 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 cores64 (Tetrahexaconta-Core)48 (Octatetraconta-Core)
Threads12896
Base clock speed2 GHz2.3 GHz
Boost clock speed3.35 GHz3.6 GHz
L1 cache96K (per core)64 KB (per core)
L2 cache512K (per core)512 KB (per core)
L3 cache256 MB (shared)256 MB (shared)
Chip lithography7 nm, 14 nm7 nm+
Die size192 mm28x 81 mm2
Number of transistors4,800 million33,200 million
64 bit support++
Windows 11 compatibility++
Unlocked multiplierYesYes

Compatibility

Information on EPYC 7702 and EPYC 7643 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 configuration2 (Multiprocessor)2
SocketTR4SP3
Power consumption (TDP)200 Watt225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7702 and EPYC 7643. You'll probably need this information if you require some particular technology.

AES-NI++
AVX++

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7702 and EPYC 7643 are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7702 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Eight-channelDDR4-3200
Maximum memory size4 TiB4 TiB
Max memory channels8no data
Maximum memory bandwidth204.763 GB/s204.795 GB/s
ECC memory support+no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataN/A

Peripherals

Specifications and connection of peripherals supported by EPYC 7702 and EPYC 7643.

PCIe versionno data4.0
PCI Express lanesno data128

Synthetic benchmark performance

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


Combined synthetic benchmark 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 7702 45.49
EPYC 7643 49.78
+9.4%

EPYC 7643 outperforms EPYC 7702 by 9% in our combined benchmark results.


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: 68%

EPYC 7702 69872
EPYC 7643 76455
+9.4%

EPYC 7643 outperforms EPYC 7702 by 9% in Passmark.

Gaming performance

Advantages and disadvantages


Performance score 45.49 49.78
Recency 7 August 2019 15 March 2021
Physical cores 64 48
Threads 128 96
Cost $6450 $4995
Power consumption (TDP) 200 Watt 225 Watt

We couldn't decide between EPYC 7702 and EPYC 7643. The differences in performance seem too small.


Should you still have questions on choice between EPYC 7702 and EPYC 7643, ask them in Comments section, and we shall answer.

User ratings

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


AMD EPYC 7702
EPYC 7702
AMD EPYC 7643
EPYC 7643

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 ratings: view and submit

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


4.6 28 votes

Rate AMD EPYC 7702 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
1.2 232 votes

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

  • 1
  • 2
  • 3
  • 4
  • 5

Questions and comments

Here you can ask a question about EPYC 7702 or EPYC 7643, agree or disagree with our judgements, or report an error or mismatch.