Average Bench: 80% (57th of 113)

Based on 2,784 user benchmarks.  Model: Corsair CMW16GX4M2A2666C16 4x8GB

Good average bench

The Corsair CMW16GX4M2A2666C16 4x8GB averaged 20.0% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Corsair CMW16GX4M2A2666C16 4x8GB near the top of the comparison list.


Avg. 16 Core Read Bench 30.1GB/s
Avg. 1 Core Write Bench 29.6GB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Corsair CMW16GX4M2A2666C16 4x8GB is 31.5%. This is a relatively narrow range which indicates that the Corsair CMW16GX4M2A2666C16 4x8GB performs reasonably consistently under varying real world conditions.


Avg. Physical RAM Latency 75.6ns
Avg. 1 Core Read Bench 18.6GB/s

Average Bench

(Based on 2,784 samples)
Min Avg Max
23.5 MC Read 30.1 37.1
18 MC Write 29.4 37.5
20.2 MC Mixed 26 32.8
81.5% 28.5 GB/s
Min Avg Max
13.1 SC Read 18.6 25.1
16.9 SC Write 29.6 38.7
17.6 SC Mixed 25 32.3
69.7% 24.4 GB/s
Min Avg Max
60.7 Latency 75.6 105
52.9% 75.6 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 @ 2666 MHz
MC Read 32.1
MC Write 34.2
MC Mixed 26.3
88% 30.9 GB/s
SC Read 17.9
SC Write 34.9
SC Mixed 23.9
73% 25.6 GB/s
Latency 60
67% 60 ns
4 of 4 slots used
32GB DIMM DDR4 clocked @ 2666 MHz
MC Read 31
MC Write 31.3
MC Mixed 24.1
82% 28.8 GB/s
SC Read 17.3
SC Write 34.9
SC Mixed 24.6
73% 25.6 GB/s
Latency 68.1
59% 68.1 ns
4 of 4 slots used
32GB DIMM DDR4 clocked @ 2800 MHz
MC Read 32.5
MC Write 20.8
MC Mixed 32.1
81% 28.5 GB/s
SC Read 24.1
SC Write 20.4
SC Mixed 32.3
73% 25.6 GB/s
Latency 92.1
43% 92.1 ns
4 of 4 slots used
32GB DIMM DDR4 2133 MHz clocked @ 1067 MHz
MC Read 27.8
MC Write 24.2
MC Mixed 25
73% 25.7 GB/s
SC Read 20.6
SC Write 26.6
SC Mixed 23.3
67% 23.5 GB/s
Latency 87.3
46% 87.3 ns
2,784 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 45,741,394 RAM Kits tested.

Typical CMW16GX4M2A2666C16 4x8GB Builds (Compare 37,192 builds) See popular component choices, score breakdowns and rankings.
Gaming 116%
Desktop 101%
Workstation 109%

Motherboard: Asus PRIME Z390-A - $163

EDIT WITH CUSTOM PC BUILDER Value: 69% - Good Total price: $1,129

Popular CMW16GX4M2A2666C16 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.

UserBenchmark of the month

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 $44
Intel Core i5-11400F $260Nvidia RTX 3070 $500Samsung 850 Evo 120GB $183
Intel Core i7-11700K $346Nvidia GTX 1660S (Super) $240Samsung 860 Evo 250GB $52
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) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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