AMD EPYC 7443 vs AMD EPYC 7643

Comparative analysis of AMD EPYC 7443 and AMD EPYC 7643 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark.

AMD EPYC 7443

AMD EPYC 7643

Differences

Reasons to consider the AMD EPYC 7443

Around 11% higher clock speed: 4.0 GHz vs 3.6 GHz
Around 20% lower typical power consumption: 200 Watt vs 240 Watt
Around 24% better performance in PassMark - Single thread mark: 2380 vs 1915

Specifications (specs)
Maximum frequency	4.0 GHz vs 3.6 GHz
Thermal Design Power (TDP)	200 Watt vs 240 Watt
Benchmarks
PassMark - Single thread mark	2380 vs 1915

Reasons to consider the AMD EPYC 7643

24 more cores, run more applications at once: 48 vs 24
48 more threads: 96 vs 48
2x more L1 cache, more data can be stored in the L1 cache for quick access later
2x more L2 cache, more data can be stored in the L2 cache for quick access later
2x more L3 cache, more data can be stored in the L3 cache for quick access later
Around 24% better performance in PassMark - CPU mark: 88348 vs 71156

Specifications (specs)
Number of cores	48 vs 24
Number of threads	96 vs 48
L1 cache	3 MB vs 1536 KB
L2 cache	24 MB vs 12 MB
L3 cache	256 MB vs 128 MB
Benchmarks
PassMark - CPU mark	88348 vs 71156

Compare benchmarks

CPU 1: AMD EPYC 7443
CPU 2: AMD EPYC 7643

PassMark - Single thread mark

CPU 1

CPU 2

2380

1915

PassMark - CPU mark

CPU 1

CPU 2

71156

88348

Name	AMD EPYC 7443	AMD EPYC 7643
PassMark - Single thread mark	2380	1915
PassMark - CPU mark	71156	88348

Compare specifications (specs)

	AMD EPYC 7443	AMD EPYC 7643
Essentials
Architecture codename	Zen 3	Zen 3
Launch date	15 Mar 2021	15 Mar 2021
Launch price (MSRP)	$2010	$4995
OPN PIB	100-100000340WOF	100-100000326WOF
OPN Tray	100-000000340	100-000000326
Place in performance rating	235	224
Vertical segment	Server	Server
Performance
Base frequency	2.85 GHz	2.3 GHz
L1 cache	1536 KB	3 MB
L2 cache	12 MB	24 MB
L3 cache	128 MB	256 MB
Manufacturing process technology	7 nm+	7 nm+
Maximum frequency	4.0 GHz	3.6 GHz
Number of cores	24	48
Number of threads	48	96
Unlocked
Memory
ECC memory support
Max memory channels	8	8
Maximum memory bandwidth	190.73 GB/s	190.73 GB/s
Maximum memory size	4 TB	4 TB
Supported memory types	DDR4-3200	DDR4-3200
Compatibility
Configurable TDP	165-200 Watt	225-240 Watt
Socket Count	2P	1P/2P
Sockets supported	SP3	SP3
Thermal Design Power (TDP)	200 Watt	240 Watt
Peripherals
Max number of PCIe lanes	128	128
PCI Express revision	4.0	4.0
Advanced Technologies
AMD SenseMI
Fused Multiply-Add 3 (FMA3)
Intel® Advanced Vector Extensions (AVX)
Intel® Advanced Vector Extensions 2 (AVX2)
Intel® AES New Instructions
Virtualization
AMD Virtualization (AMD-V™)