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Corsair

CMW64GX4M4A2666C16 2x16GB

▲ 500 ▼

Release date ≈ Q1 2019.

Average Bench: 74.6% (71st of 115)

Based on 50 user benchmarks.  Model: Corsair CMW64GX4M4A2666C16 2x16GB
Poor: 49%Average: 74.6% Great: 92%

Popular builds with this RAM

Good average bench

The Corsair CMW64GX4M4A2666C16 2x16GB averaged 25.4% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 16 Core Write Bench 27.8GB/s
Avg. 16 Core Read Bench 27.6GB/s

Average consistency

The range of scores (95th - 5th percentile) for the Corsair CMW64GX4M4A2666C16 2x16GB is 43%. This is a relatively wide range which indicates that the Corsair CMW64GX4M4A2666C16 2x16GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. 1 Core Read Bench 17.5GB/s
Avg. Physical RAM Latency 78.9ns
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Average Bench

(Based on 50 samples)
Rank 7174.6%
Min Avg Max
12.9 MC Read 27.6 37.8
13.1 MC Write 27.8 36
11.1 MC Mixed 24.2 33
75.8% 26.5 GB/s
Min Avg Max
6.1 SC Read 17.5 29.6
10.9 SC Write 27.5 38.4
10.1 SC Mixed 22.8 33.5
64.6% 22.6 GB/s
Min Avg Max
57.9 Latency 78.9 155
50.7% 78.9 ns
User Benchmarks BenchMulti coreSingle coreLatency
The fastest RAM (mainstream) averages a speed of 100%
2 of 2 slots used
32GB DIMM DDR4 clocked @ 2666 MHz
94% Outstanding
MC Read 35.4
MC Write 35.4
MC Mixed 31.9
98% 34.2 GB/s
SC Read 23.8
SC Write 37.5
SC Mixed 27.2
84% 29.5 GB/s
Latency 106
38% 106 ns
2 of 4 slots used
32GB DIMM DDR4 clocked @ 2666 MHz
84.6% Excellent
MC Read 36.4
MC Write 20
MC Mixed 33.2
85% 29.9 GB/s
SC Read 29.4
SC Write 19.7
SC Mixed 34
79% 27.7 GB/s
Latency 72.9
55% 72.9 ns
2 of 4 slots used
32GB DIMM DDR4 clocked @ 2666 MHz
82.9% Excellent
MC Read 31.6
MC Write 31.8
MC Mixed 26.3
85% 29.9 GB/s
SC Read 16.2
SC Write 32.1
SC Mixed 23
68% 23.8 GB/s
Latency 70.6
57% 70.6 ns
2 of 4 slots used
32GB DIMM DDR4 clocked @ 2666 MHz
82.9% Excellent
MC Read 35.7
MC Write 20.2
MC Mixed 32.2
84% 29.4 GB/s
SC Read 28.9
SC Write 20.3
SC Mixed 31.9
77% 27 GB/s
Latency 78.1
51% 78.1 ns
2 of 4 slots used
32GB DIMM DDR4 clocked @ 2667 MHz
78.8% Very good
MC Read 33.1
MC Write 19.6
MC Mixed 30.7
79% 27.8 GB/s
SC Read 27.7
SC Write 19.3
SC Mixed 31.3
74% 26.1 GB/s
Latency 80.4
50% 80.4 ns
2 of 4 slots used
32GB DIMM DDR4 clocked @ 2133 MHz
75.9% Very good
MC Read 28.3
MC Write 28.6
MC Mixed 23
76% 26.6 GB/s
SC Read 18.1
SC Write 30.4
SC Mixed 23.5
69% 24 GB/s
Latency 68.1
59% 68.1 ns
2 of 4 slots used
32GB DIMM DDR4 clocked @ 2133 MHz
75.2% Very good
MC Read 27.4
MC Write 28.4
MC Mixed 23
75% 26.3 GB/s
SC Read 17
SC Write 30.6
SC Mixed 23.5
68% 23.7 GB/s
Latency 64.2
62% 64.2 ns
2 of 4 slots used
32GB DIMM DDR4 clocked @ 2667 MHz
48.2% Average
MC Read 17.2
MC Write 16.9
MC Mixed 15.3
47% 16.5 GB/s
SC Read 13.9
SC Write 16.2
SC Mixed 14.7
43% 14.9 GB/s
Latency 75.7
53% 75.7 ns
50 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 67,031,667 RAM Kits tested

Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
Typical CMW64GX4M4A2666C16 2x16GB Builds (Compare 346 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 102%
UFO
Desktop
Desktop 100%
Nuclear submarine
Workstation
Workstation 95%
Nuclear submarine

Motherboard: Asrock Z390 Phantom Gaming 6

CPU
Core i7-9700KIntel  $252Bench 97%, 550,833 samples109x
Core i9-9900KIntel  $410Bench 98%, 354,223 samples90x
Core i5-9600KIntel  $155Bench 93%, 321,194 samples47x
GPU
RTX 2070Nvidia  $200Bench 104%, 478,117 samples27x
RTX 2080Nvidia  $396Bench 124%, 316,424 samples24x
GTX 1080-TiNvidia  $485Bench 124%, 840,268 samples24x
SSD
970 Evo Plus NVMe PCIe M.2 500GBSamsung  $43Bench 276%, 367,854 samples19x
MX500 1TBCrucial  $66Bench 106%, 202,785 samples18x
970 Evo NVMe PCIe M.2 500GBSamsung  $43Bench 273%, 381,216 samples17x
RAM
CMW64GX4M4A2666C16 2x16GBCorsairBench 75%, 50 samples1x
EDIT WITH CUSTOM PC BUILDER Value: 110% - Outstanding Total price: $495

Popular CMW64GX4M4A2666C16 2x16GB compatible motherboards:

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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]

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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.

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Speed Comparisons

vs Corsair Vengeance LPX DDR4 3200 C16 2x8GB
vs Corsair Vengeance LPX DDR4 3000 C15 2x8GB
vs G.SKILL Trident Z DDR4 3200 C14 4x16GB
vs G.SKILL Trident Z DDR4 3600 C16 2x8GB
vs HyperX Fury DDR4 2133 C14 2x8GB
vs Corsair Vengeance LPX DDR4 2666 C16 2x8GB
vs Corsair Vengeance LPX DDR4 2133 C13 2x8GB
vs G.SKILL Ripjaws 4 DDR4 2400 C14 8x16GB
vs G.SKILL Trident Z DDR4 3200 C16 2x8GB

115 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.

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 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $273Nvidia RTX 4060 $295Crucial MX500 250GB $40
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $179Nvidia RTX 4070 $539Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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