Average Bench: 76.2% (64th of 108)

Based on 8,306 user benchmarks.  Model: Corsair CMW16GX4M2A2666C16 2x8GB

Good average bench

The Corsair CMW16GX4M2A2666C16 2x8GB averaged 23.8% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Corsair CMW16GX4M2A2666C16 2x8GB near the top of the comparison list.


Avg. 16 Core Read Bench 29.9GB/s
Avg. 16 Core Write Bench 27.7GB/s

Average consistency

The range of scores (95th - 5th percentile) for the Corsair CMW16GX4M2A2666C16 2x8GB is 45%. This is a relatively wide range which indicates that the Corsair CMW16GX4M2A2666C16 2x8GB performs inconsistently under varying real world conditions.


Avg. 1 Core Read Bench 18.3GB/s
Avg. Physical RAM Latency 73.2ns

Average Bench

(Based on 8,306 samples)
Min Avg Max
17.3 MC Read 29.9 37.6
16.3 MC Write 27.7 35.1
16.7 MC Mixed 23.7 31.1
77.4% 27.1 GB/s
Min Avg Max
12.3 SC Read 18.3 23.5
14 SC Write 26.6 35.4
13.6 SC Mixed 23.2 28.7
64.9% 22.7 GB/s
Min Avg Max
56 Latency 73.2 101
54.7% 73.2 ns
User Benchmarks Bench Multi core Single core Latency
The fastest RAM (mainstream) averages a speed of 100%
2 of 4 slots used
16GB DIMM DDR4 clocked @ 2666 MHz
MC Read 38.1
MC Write 34.9
MC Mixed 30.7
99% 34.6 GB/s
SC Read 24.7
SC Write 36.2
SC Mixed 28.6
85% 29.8 GB/s
Latency 78.5
51% 78.5 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 2133 MHz
MC Read 29
MC Write 28
MC Mixed 21.3
75% 26.1 GB/s
SC Read 17.9
SC Write 28
SC Mixed 22.9
66% 22.9 GB/s
Latency 63.2
63% 63.2 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 2133 MHz
MC Read 27.8
MC Write 26.8
MC Mixed 21
72% 25.2 GB/s
SC Read 17.3
SC Write 27.6
SC Mixed 22.6
64% 22.5 GB/s
Latency 64.8
62% 64.8 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 2133 MHz
MC Read 24.9
MC Write 26.5
MC Mixed 20.7
69% 24 GB/s
SC Read 14.8
SC Write 24.6
SC Mixed 21.1
58% 20.2 GB/s
Latency 83.2
48% 83.2 ns
8,306 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 23,537,147 RAM Kits tested.

Typical CMW16GX4M2A2666C16 2x8GB Builds (Compare 37,300 builds) See popular component choices, score breakdowns and rankings.
Gaming 56%
Desktop 72%
Workstation 60%

Motherboard: Asus ROG STRIX B450-F GAMING - $120

EDIT WITH CUSTOM PC BUILDER Value: 76% - Very good Total price: $475

Popular CMW16GX4M2A2666C16 2x8GB 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.
  • - 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.
  • - Share your opinion by voting.
Memory Kit Rankings (Price vs Performance) January 2020 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.


108 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.
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Intel Core i5-9600K $219Nvidia GTX 1650S (Super) $160Samsung 850 Evo 120GB $78
Intel Core i7-9700K $370Nvidia RTX 2060 $332Samsung 850 Pro 512GB $204
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $63SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $640SanDisk Ultra Fit 32GB $16
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