EPYC 7742: specs and benchmarks

Summary

AMD started EPYC 7742 sales 7 August 2019 at a recommended price of $6,950. This is a Zen 2 architecture desktop processor primarily aimed at professional systems. It has 64 cores and 128 threads, and is based on 7 nm, 14 nm manufacturing technology, with a max turbo frequency of 3400 MHz and an unlocked multiplier.

Compatibility-wise, this is AMD Socket TR4 processor with a TDP of 225 Watt. It supports DDR4 Eight-channel memory.

Primary details

EPYC 7742 processor market type (desktop or notebook), architecture, sales start time and pricing.

Place in the ranking	45
Place by popularity	not in top-100
Cost-effectiveness evaluation	3.55
Market segment	Server
Series	AMD EPYC
Power efficiency	18.54	of 100.00 (Ryzen Z1 Extreme)
Architecture codename	Zen 2 (2017−2020)
Release date	7 August 2019 (5 years ago)
Launch price (MSRP)	$6,950	of 17,906 (Xeon Platinum 8280L)

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.

Physical cores	64 (Tetrahexaconta-Core)
Threads	128
Base clock speed	2.25 GHz	of 4.7 GHz (FX-9590)
Boost clock speed	3.4 GHz	of 6.2 GHz (Core i9-14900KS)
Multiplier	22.5	of 42 (Core i7-7700K)
L1 cache	96K (per core)	of 80 KB (EPYC 9965)
L2 cache	512K (per core)	of 2 MB (Xeon 6980P)
L3 cache	256 MB (shared)	of 1152 MB (EPYC 9684X)
Chip lithography	7 nm, 14 nm	of 3 nm (Apple M3 Max 16-Core)
Die size	192 mm2
Number of transistors	4,800 million	of 135,240 million (EPYC 9684X)
64 bit support	+
Windows 11 compatibility	+
Unlocked multiplier	+

Compatibility

Information on EPYC 7742 compatibility with other computer components and devices: 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	2 (Multiprocessor)	of 8 (Opteron 842)
Socket	TR4
Power consumption (TDP)	225 Watt	of 500 Watt (Xeon 6960P)

Technologies and extensions

Technological capabilities and additional instructions supported by EPYC 7742. You'll probably need this information if you require some particular technology.

AES-NI	+
AVX	+
Precision Boost 2	+

Virtualization technologies

Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.

AMD-V

+

Memory specs

Types, maximum amount and channel number of RAM supported by EPYC 7742's memory controller. Depending on the motherboard, higher memory frequency may be supported.

Supported memory types	DDR4 Eight-channel
Maximum memory size	4 TiB	of 6 TiB (EPYC 9124)
Max memory channels	8	of 12 (Xeon Platinum 9221)
Maximum memory bandwidth	204.763 GB/s	of 460.8 GB/s (EPYC 9124)
ECC memory support	+

Benchmark performance

Single-core and multi-core benchmark results of EPYC 7742. Overall benchmark performance is measured in points in 0-100 range, higher is better.

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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.

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Closest competitors

EPYC 7742's performance relative to its closest rivals among server CPUs.

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