AMD EPYC 7443 vs AMD EPYC 7551

Comparative analysis of AMD EPYC 7443 and AMD EPYC 7551 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, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core.

AMD EPYC 7443

AMD EPYC 7551

Differences

Reasons to consider the AMD EPYC 7443

CPU is newer: launch date 3 year(s) 9 month(s) later
Around 33% higher clock speed: 4.0 GHz vs 3 GHz
A newer manufacturing process allows for a more powerful, yet cooler running processor: 7 nm+ vs 14 nm
2x more L3 cache, more data can be stored in the L3 cache for quick access later
Around 33% better performance in PassMark - Single thread mark: 2380 vs 1790
Around 23% better performance in PassMark - CPU mark: 71156 vs 57841

Specifications (specs)
Launch date	15 Mar 2021 vs June 2017
Maximum frequency	4.0 GHz vs 3 GHz
Manufacturing process technology	7 nm+ vs 14 nm
L3 cache	128 MB vs 64 MB
Benchmarks
PassMark - Single thread mark	2380 vs 1790
PassMark - CPU mark	71156 vs 57841

Reasons to consider the AMD EPYC 7551

Processor is unlocked, an unlocked multiplier allows for easier overclocking
8 more cores, run more applications at once: 32 vs 24
16 more threads: 64 vs 48
2x more L1 cache, more data can be stored in the L1 cache for quick access later
Around 33% more L2 cache; more data can be stored in the L2 cache for quick access later
Around 11% lower typical power consumption: 180 Watt vs 200 Watt

Unlocked	Unlocked vs Locked
Number of cores	32 vs 24
Number of threads	64 vs 48
L1 cache	96 KB (per core) vs 1536 KB
L2 cache	512 KB (per core) vs 12 MB
Thermal Design Power (TDP)	180 Watt vs 200 Watt

Compare benchmarks

CPU 1: AMD EPYC 7443
CPU 2: AMD EPYC 7551

PassMark - Single thread mark

CPU 1

CPU 2

2380

1790

PassMark - CPU mark

CPU 1

CPU 2

71156

57841

Name	AMD EPYC 7443	AMD EPYC 7551
PassMark - Single thread mark	2380	1790
PassMark - CPU mark	71156	57841
Geekbench 4 - Single Core		2956
Geekbench 4 - Multi-Core		20125

Compare specifications (specs)

	AMD EPYC 7443	AMD EPYC 7551
Essentials
Architecture codename	Zen 3	Zen
Launch date	15 Mar 2021	June 2017
Launch price (MSRP)	$2010
OPN PIB	100-100000340WOF
OPN Tray	100-000000340
Place in performance rating	285	263
Vertical segment	Server	Server
Family		AMD EPYC
Price now		$3,813.99
Series		AMD EPYC 7000 Series
Value for money (0-100)		1.43
Performance
Base frequency	2.85 GHz	2 GHz
L1 cache	1536 KB	96 KB (per core)
L2 cache	12 MB	512 KB (per core)
L3 cache	128 MB	64 MB
Manufacturing process technology	7 nm+	14 nm
Maximum frequency	4.0 GHz	3 GHz
Number of cores	24	32
Number of threads	48	64
Unlocked
64 bit support
Die size		192 mm
Transistor count		4800 million
Memory
ECC memory support
Max memory channels	8	8
Maximum memory bandwidth	190.73 GB/s	341 GB/s
Maximum memory size	4 TB
Supported memory types	DDR4-3200	DDR4
Supported memory frequency		2666 MHz
Compatibility
Configurable TDP	165-200 Watt
Socket Count	2P	1P/2P
Sockets supported	SP3	TR4
Thermal Design Power (TDP)	200 Watt	180 Watt
Max number of CPUs in a configuration		2
Peripherals
Max number of PCIe lanes	128
PCI Express revision	4.0	x128
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™)