Average Bench: 98.9% (6th of 113)

Based on 639 user benchmarks.  Model: Corsair CMW16GX4M2Z4000C18 2x8GB

Excellent average bench

The Corsair CMW16GX4M2Z4000C18 2x8GB averaged just 1.1% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Corsair CMW16GX4M2Z4000C18 2x8GB near the top of the comparison list.


Avg. 16 Core Read Bench 40.7GB/s
Avg. 1 Core Mixed IO Bench 34GB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Corsair CMW16GX4M2Z4000C18 2x8GB is 59.2%. This is a relatively wide range which indicates that the Corsair CMW16GX4M2Z4000C18 2x8GB performs inconsistently under varying real world conditions.


Avg. Physical RAM Latency 69.9ns
Avg. 1 Core Read Bench 25.6GB/s

Average Bench

(Based on 639 samples)
Min Avg Max
28.7 MC Read 40.7 64.2
20 MC Write 33 50.1
22 MC Mixed 33.1 40.6
102% 35.6 GB/s
Min Avg Max
17.6 SC Read 25.6 33.4
19.4 SC Write 30.2 49.1
23.5 SC Mixed 34 42.6
85.6% 30 GB/s
Min Avg Max
50.4 Latency 69.9 89.3
57.2% 69.9 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 @ 4000 MHz
MC Read 58.9
MC Write 42.8
MC Mixed 37.8
133% 46.5 GB/s
SC Read 29.4
SC Write 26.7
SC Mixed 39.2
91% 31.8 GB/s
Latency 66.2
60% 66.2 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 3733 MHz
MC Read 49
MC Write 42.4
MC Mixed 35.8
121% 42.4 GB/s
SC Read 30.1
SC Write 41.8
SC Mixed 31.8
99% 34.6 GB/s
Latency 70.1
57% 70.1 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 4000 MHz
MC Read 45.8
MC Write 30
MC Mixed 40.4
111% 38.7 GB/s
SC Read 33.8
SC Write 29.5
SC Mixed 42.5
101% 35.3 GB/s
Latency 57
70% 57 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 4000 MHz
MC Read 36.4
MC Write 28.8
MC Mixed 35.2
96% 33.5 GB/s
SC Read 31.8
SC Write 28.5
SC Mixed 38.3
94% 32.9 GB/s
Latency 61.8
65% 61.8 ns
639 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 47,853,790 RAM Kits tested.

Typical CMW16GX4M2Z4000C18 2x8GB Builds (Compare 80,037 builds) See popular component choices, score breakdowns and rankings.
Gaming 104%
Desktop 93%
Nuclear submarine
Workstation 107%

Motherboard: Asus TUF GAMING X570-PLUS (WI-FI) - $191

EDIT WITH CUSTOM PC BUILDER Value: 70% - Good Total price: $1,144

Popular CMW16GX4M2Z4000C18 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.
  • - 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) December 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.
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Intel Core i5-11600K $220Nvidia RTX 3060-Ti $400Samsung 860 Evo 250GB $52
Intel Core i5-11400F $195Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $200
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $76SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $74SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $71G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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