EPYC 7742 vs Ryzen 9 3900X

VS

Aggregate performance score

Ryzen 9 3900X
2019
12 cores / 24 threads, 125 Watt
20.53
EPYC 7742
2019
64 cores / 128 threads, 225 Watt
43.86
+114%

EPYC 7742 outperforms Ryzen 9 3900X by a whopping 114% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 9 3900X and EPYC 7742 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking26947
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation20.913.35
Market segmentDesktop processorServer
SeriesAMD Ryzen 9AMD EPYC
Power efficiency15.5418.45
Architecture codenameMatisse (Zen 2) (2019−2020)Zen 2 (2017−2020)
Release date7 July 2019 (5 years ago)7 August 2019 (5 years ago)
Launch price (MSRP)$499$6,950

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 3900X has 524% better value for money than EPYC 7742.

Detailed specifications

Ryzen 9 3900X and EPYC 7742 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 cores12 (Dodeca-Core)64 (Tetrahexaconta-Core)
Threads24128
Base clock speed3.8 GHz2.25 GHz
Boost clock speed4.6 GHz3.4 GHz
Multiplierno data22.5
L1 cache96K (per core)96K (per core)
L2 cache512K (per core)512K (per core)
L3 cache64 MB256 MB (shared)
Chip lithography7 nm, 12 nm7 nm, 14 nm
Die sizeno data192 mm2
Maximum core temperature95 °Cno data
Number of transistors19,200 million4,800 million
64 bit support++
Windows 11 compatibility++
Unlocked multiplier++

Compatibility

Information on Ryzen 9 3900X and EPYC 7742 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 configuration1 (Uniprocessor)2 (Multiprocessor)
SocketAM4TR4
Power consumption (TDP)125 Watt225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3900X and EPYC 7742. 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 3900X and EPYC 7742 are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900X and EPYC 7742. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Dual-channelDDR4 Eight-channel
Maximum memory size128 GB4 TiB
Max memory channels28
Maximum memory bandwidth51.196 GB/s204.763 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 3900X 20.53
EPYC 7742 43.86
+114%

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 3900X 32617
EPYC 7742 69663
+114%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Ryzen 9 3900X 1710
+42%
EPYC 7742 1204

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Ryzen 9 3900X 9947
EPYC 7742 11782
+18.4%

Gaming performance

Pros & cons summary


Performance score 20.53 43.86
Recency 7 July 2019 7 August 2019
Physical cores 12 64
Threads 24 128
Power consumption (TDP) 125 Watt 225 Watt

Ryzen 9 3900X has 80% lower power consumption.

EPYC 7742, on the other hand, has a 113.6% higher aggregate performance score, an age advantage of 1 month, and 433.3% more physical cores and 433.3% more threads.

The EPYC 7742 is our recommended choice as it beats the Ryzen 9 3900X in performance tests.

Note that Ryzen 9 3900X is a desktop processor while EPYC 7742 is a server/workstation one.


Should you still have questions on choice between Ryzen 9 3900X and EPYC 7742, ask them in Comments section, and we shall answer.

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AMD Ryzen 9 3900X
Ryzen 9 3900X
AMD EPYC 7742
EPYC 7742

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


4.7 5145 votes

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Questions & comments

Here you can ask a question about Ryzen 9 3900X or EPYC 7742, agree or disagree with our judgements, or report an error or mismatch.