AMD EPYC 7251 vs AMD EPYC 7281

Comparative analysis of AMD EPYC 7251 and AMD EPYC 7281 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark.

AMD EPYC 7251

AMD EPYC 7281

Differences

Reasons to consider the AMD EPYC 7251

Around 7% higher clock speed: 2.9 GHz vs 2.7 GHz
Around 42% lower typical power consumption: 120 Watt vs 155/170 Watt
Around 3% better performance in PassMark - Single thread mark: 1671 vs 1626

Specifications (specs)
Maximum frequency	2.9 GHz vs 2.7 GHz
Thermal Design Power (TDP)	120 Watt vs 155/170 Watt
Benchmarks
PassMark - Single thread mark	1671 vs 1626

Reasons to consider the AMD EPYC 7281

8 more cores, run more applications at once: 16 vs 8
16 more threads: 32 vs 16
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
Around 45% better performance in PassMark - CPU mark: 21621 vs 14935

Specifications (specs)
Number of cores	16 vs 8
Number of threads	32 vs 16
L1 cache	96 KB (per core) vs 96 KB (per core)
L2 cache	512 KB (per core) vs 512 KB (per core)
Benchmarks
PassMark - CPU mark	21621 vs 14935

Compare benchmarks

CPU 1: AMD EPYC 7251
CPU 2: AMD EPYC 7281

PassMark - Single thread mark

CPU 1

CPU 2

1671

1626

PassMark - CPU mark

CPU 1

CPU 2

14935

21621

Name	AMD EPYC 7251	AMD EPYC 7281
PassMark - Single thread mark	1671	1626
PassMark - CPU mark	14935	21621

Compare specifications (specs)

	AMD EPYC 7251	AMD EPYC 7281
Essentials
Architecture codename	Zen	Zen
Family	AMD EPYC	AMD EPYC
Launch date	June 2017	June 2017
Place in performance rating	1315	1235
Series	AMD EPYC 7000 Series	AMD EPYC 7000 Series
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	2.1 GHz	2.1 GHz
Die size	192 mm	192 mm
L1 cache	96 KB (per core)	96 KB (per core)
L2 cache	512 KB (per core)	512 KB (per core)
L3 cache	32 MB	32 MB
Manufacturing process technology	14 nm	14 nm
Maximum frequency	2.9 GHz	2.7 GHz
Number of cores	8	16
Number of threads	16	32
Transistor count	4800 million	4800 million
Unlocked
Memory
Max memory channels	8	8
Maximum memory bandwidth	307 GB/s	307/341 GB/s
Supported memory frequency	2400 MHz	2400/2666 MHz
Supported memory types	DDR4	DDR4
Compatibility
Max number of CPUs in a configuration	2	2
Socket Count	1P/2P	1P/2P
Sockets supported	TR4	TR4
Thermal Design Power (TDP)	120 Watt	155/170 Watt
Peripherals
PCI Express revision	x128	x128
Virtualization
AMD Virtualization (AMD-V™)