AMD Ryzen 9 PRO 7945 vs AMD EPYC 7543

Comparative analysis of AMD Ryzen 9 PRO 7945 and AMD EPYC 7543 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 Ryzen 9 PRO 7945

AMD EPYC 7543

Differences

Reasons to consider the AMD Ryzen 9 PRO 7945

CPU is newer: launch date 2 year(s) 2 month(s) later
Around 46% higher clock speed: 5.4 GHz vs 3.7 GHz
A newer manufacturing process allows for a more powerful, yet cooler running processor: 5 nm vs 7 nm+
3.7x lower typical power consumption: 65 Watt vs 240 Watt
Around 57% better performance in PassMark - Single thread mark: 4178 vs 2668

Specifications (specs)
Launch date	13 Jun 2023 vs 15 Mar 2021
Maximum frequency	5.4 GHz vs 3.7 GHz
Manufacturing process technology	5 nm vs 7 nm+
Thermal Design Power (TDP)	65 Watt vs 240 Watt
Benchmarks
PassMark - Single thread mark	4178 vs 2668

Reasons to consider the AMD EPYC 7543

20 more cores, run more applications at once: 32 vs 12
40 more threads: 64 vs 24
2.7x more L1 cache, more data can be stored in the L1 cache for quick access later
1398101.3x more L2 cache, more data can be stored in the L2 cache for quick access later
4194304x more L3 cache, more data can be stored in the L3 cache for quick access later
2x better performance in PassMark - CPU mark: 97843 vs 47830

Specifications (specs)
Number of cores	32 vs 12
Number of threads	64 vs 24
L1 cache	2 MB vs 64K (per core)
L2 cache	16 MB vs 1MB (per core)
L3 cache	256 MB vs 64MB (shared)
Benchmarks
PassMark - CPU mark	97843 vs 47830

Compare benchmarks

CPU 1: AMD Ryzen 9 PRO 7945
CPU 2: AMD EPYC 7543

PassMark - Single thread mark

CPU 1

CPU 2

4178

2668

PassMark - CPU mark

CPU 1

CPU 2

47830

97843

Name	AMD Ryzen 9 PRO 7945	AMD EPYC 7543
PassMark - Single thread mark	4178	2668
PassMark - CPU mark	47830	97843

Compare specifications (specs)

	AMD Ryzen 9 PRO 7945	AMD EPYC 7543
Essentials
Launch date	13 Jun 2023	15 Mar 2021
Place in performance rating	76	74
Architecture codename		Zen 3
Launch price (MSRP)		$3761
OPN PIB		100-100000345WOF
OPN Tray		100-000000345
Vertical segment		Server
Performance
Base frequency	3.7 GHz	2.8 GHz
Die size	2x 71 mm²
L1 cache	64K (per core)	2 MB
L2 cache	1MB (per core)	16 MB
L3 cache	64MB (shared)	256 MB
Manufacturing process technology	5 nm	7 nm+
Maximum case temperature (TCase)	47°C
Maximum core temperature	95°C
Maximum frequency	5.4 GHz	3.7 GHz
Number of cores	12	32
Number of threads	24	64
Transistor count	13,140 million
Unlocked
Memory
ECC memory support
Supported memory types	DDR5-5200 MHz, Dual-channel	DDR4-3200
Max memory channels		8
Maximum memory bandwidth		190.73 GB/s
Maximum memory size		4 TB
Compatibility
Max number of CPUs in a configuration	1
Sockets supported	AM5	SP3
Thermal Design Power (TDP)	65 Watt	240 Watt
Configurable TDP		225-240 Watt
Socket Count		1P/2P
Peripherals
PCIe configurations	Gen 5, 24 Lanes, (CPU only)
Max number of PCIe lanes		128
PCI Express revision		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™)