Average Bench: 96.6% (11th of 113)

Based on 452 user benchmarks.  Model: Corsair CMW16GX4M2Z4000C18 2x8GB

Excellent average bench

The Corsair CMW16GX4M2Z4000C18 2x8GB averaged just 3.3% 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 39.3GB/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 55%. This is a relatively wide range which indicates that the Corsair CMW16GX4M2Z4000C18 2x8GB performs inconsistently under varying real world conditions.


Avg. Physical RAM Latency 71.4ns
Avg. 1 Core Read Bench 25.1GB/s

Average Bench

(Based on 452 samples)
Min Avg Max
28.7 MC Read 39.3 60.5
19.8 MC Write 31.9 47.7
22.3 MC Mixed 32.9 39
99.2% 34.7 GB/s
Min Avg Max
17.8 SC Read 25.1 30.9
19.1 SC Write 29.5 49.1
22.7 SC Mixed 34 42.2
84.4% 29.5 GB/s
Min Avg Max
49.2 Latency 71.4 90.6
56% 71.4 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 49.5
MC Write 46.5
MC Mixed 37.9
128% 44.6 GB/s
SC Read 25.2
SC Write 26.9
SC Mixed 38.4
86% 30.2 GB/s
Latency 80.1
50% 80.1 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 4000 MHz
MC Read 48.7
MC Write 45.5
MC Mixed 37.8
126% 44 GB/s
SC Read 25.3
SC Write 23.1
SC Mixed 37.6
82% 28.7 GB/s
Latency 79.8
50% 79.8 ns
2 of 4 slots used
16GB DIMM DDR4 clocked @ 2666 MHz
MC Read 32.8
MC Write 19.9
MC Mixed 29.4
78% 27.4 GB/s
SC Read 27.5
SC Write 20.1
SC Mixed 31.4
75% 26.3 GB/s
Latency 77.3
52% 77.3 ns
452 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 44,340,894 RAM Kits tested.

Typical CMW16GX4M2Z4000C18 2x8GB Builds (Compare 67,505 builds) See popular component choices, score breakdowns and rankings.
Gaming 106%
Desktop 94%
Nuclear submarine
Workstation 108%

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

EDIT WITH CUSTOM PC BUILDER Value: 70% - Good Total price: $1,106

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) July 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 i5-11400F $260Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-10700K $320Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $80SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback