EPYC 7662 vs Ryzen 9 PRO 3900

Place in the ranking	280	43
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Series	AMD Ryzen 9	AMD EPYC
Power efficiency	28.97	19.14
Architecture codename	Zen 2 (2017−2020)	Zen 2 (2017−2020)
Release date	30 September 2019 (5 years ago)	19 February 2020 (4 years ago)

Detailed specifications

Ryzen 9 PRO 3900 and EPYC 7662 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 cores	12 (Dodeca-Core)	64 (Tetrahexaconta-Core)
Threads	24	128
Base clock speed	3.1 GHz	2 GHz
Boost clock speed	4.3 GHz	3.3 GHz
Multiplier	no data	20
L1 cache	768 KB	4 MB
L2 cache	6 MB	32 MB
L3 cache	64 MB	256 MB
Chip lithography	7 nm, 12 nm	7 nm, 14 nm
64 bit support	+	+
Windows 11 compatibility	+	+

Compatibility

Information on Ryzen 9 PRO 3900 and EPYC 7662 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 configuration	1 (Uniprocessor)	no data
Socket	Socket AM4	Socket SP3
Power consumption (TDP)	65 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 PRO 3900 and EPYC 7662. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Precision Boost 2	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 PRO 3900 and EPYC 7662 are enumerated here.

AMD-V

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 PRO 3900 and EPYC 7662. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR4-3200
Maximum memory size	128 GB	4 TiB
Max memory channels	2	8
Maximum memory bandwidth	51.196 GB/s	204.763 GB/s
ECC memory support	-	+

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.

Ryzen 9 PRO 3900 19.90

EPYC 7662 45.51
+129%

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.

Ryzen 9 PRO 3900 31616

EPYC 7662 72298
+129%

Gaming performance

Pros & cons summary

Performance score	19.90	45.51
Recency	30 September 2019	19 February 2020
Physical cores	12	64
Threads	24	128
Power consumption (TDP)	65 Watt	225 Watt

Ryzen 9 PRO 3900 has 246.2% lower power consumption.

EPYC 7662, on the other hand, has a 128.7% higher aggregate performance score, an age advantage of 4 months, and 433.3% more physical cores and 433.3% more threads.

The EPYC 7662 is our recommended choice as it beats the Ryzen 9 PRO 3900 in performance tests.

Note that Ryzen 9 PRO 3900 is a desktop processor while EPYC 7662 is a server/workstation one.

Should you still have questions on choice between Ryzen 9 PRO 3900 and EPYC 7662, ask them in Comments section, and we shall answer.