Average Bench: 103% (5th of 113)

Based on 110 user benchmarks.  Model: Unknown 3866 C18 Series 4x8GB

Outstanding average bench

The Unknown 3866 C18 Series 4x8GB averaged 3.4% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Unknown 3866 C18 Series 4x8GB near the top of the comparison list.


Avg. 16 Core Read Bench 40.6GB/s
Avg. 16 Core Write Bench 36.2GB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Unknown 3866 C18 Series 4x8GB is 61.9%. This is a particularly wide range which indicates that the Unknown 3866 C18 Series 4x8GB performs inconsistently under varying real world conditions.


Avg. Physical RAM Latency 73.7ns
Avg. 1 Core Read Bench 23.8GB/s

Average Bench

(Based on 110 samples)
Min Avg Max
26.3 MC Read 40.6 53.1
18.1 MC Write 36.2 49.8
22 MC Mixed 36.2 48.4
108% 37.7 GB/s
Min Avg Max
16.1 SC Read 23.8 32.4
17.9 SC Write 32.6 53.2
22 SC Mixed 32.6 44.6
84.8% 29.7 GB/s
Min Avg Max
48.9 Latency 73.7 105
54.2% 73.7 ns
User Benchmarks Bench Multi core Single core Latency
The fastest RAM (mainstream) averages a speed of 100%
4 of 4 slots used
32GB DIMM DDR4 clocked @ 3866 MHz
MC Read 46.9
MC Write 29
MC Mixed 43.3
114% 39.7 GB/s
SC Read 34.5
SC Write 28.8
SC Mixed 46.2
104% 36.5 GB/s
Latency 54.7
73% 54.7 ns
110 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 45,831,192 RAM Kits tested.

Typical 3866 C18 Series 4x8GB Builds (Compare 10,767 builds) See popular component choices, score breakdowns and rankings.
Gaming 107%
Desktop 95%
Nuclear submarine
Workstation 123%

Motherboard: Gigabyte GA-X570 AORUS ULTRA

EDIT WITH CUSTOM PC BUILDER Value: 68% - Good Total price: $1,114

Popular 3866 C18 Series 4x8GB compatible motherboards:

How Fast Is Your RAM? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
Memory Kit Rankings (Price vs Performance) September 2021 RAM Rankings.

We calculate effective RAM speed which measures performance for typical desktop users. Effective speed is adjusted by current cost per GB to yield value for money. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top Memory Kits. [RAMPro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


113 Memory Kits (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different RAM Kits perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-11600K $270Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $380Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $74SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $77SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $72G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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