CorsairCMK16GX4M4A2666C16(|B|R)
CorsairCMK16GX4M2A2666C16(|R)
Real World Speed
Performance profile from 8,409 user samples
1,074 User Benchmarks
Best Bench: 113% @ 1333 MHz
Worst Bench: 68% @ 2133 MHz
Poor: 68% Great: 113%
SPEED RANK: 18th / 70
7,335 User Benchmarks
Best Bench: 95% @ 3333 MHz
Worst Bench: 51% @ 2666 MHz
Poor: 51% Great: 95%
SPEED RANK: 36th / 70
Effective Speed
Effective RAM Speed
90.6 % Faster effective speed.
+16%
77.9 % -16%
MC Read
Avg. 16 Core Read Bench
34.5 GB/s Faster multi-core read.
+17%
29.4 GB/s -17%
MC Write
Avg. 16 Core Write Bench
35.6 GB/s Faster multi-core write.
+21%
29.4 GB/s -21%
MC Mixed
Avg. 16 Core Mixed IO Bench
31.1 GB/s Faster multi-core mixed.
+25%
24.9 GB/s -25%
MC Read
16 Core Read Bench
43.4 GB/s Slightly faster multi-core read.
+14%
38 GB/s -14%
MC Write
16 Core Write Bench
48.3 GB/s Much faster multi-core write.
+34%
36 GB/s -34%
MC Mixed
16 Core Mixed IO Bench
40.4 GB/s Faster multi-core mixed.
+26%
32 GB/s -26%
Market Share
Based on 4,916,976 RAM Kits tested.
Market Share
Market Share (trailing 30 days)
0.07 % -400% 0.35 % Hugely higher market share.
+400%
Value
Value For Money
44.4 % Slightly better value.
+14%
38.8 % -14%
User Rating
UBM User Rating
53 % -13% 60 % Slightly more popular.
+13%
Price
Price (score)
$151 Slightly cheaper.
+6%
$160 -6%
Age
Newest
37 Months -3% 36 Months +3%
SC Read
Avg. 1 Core Read Bench
16.4 GB/s -7% 17.6 GB/s Slightly faster single-core read.
+7%
SC Write
Avg. 1 Core Write Bench
25.3 GB/s -14% 28.8 GB/s Slightly faster single-core write.
+14%
SC Mixed
Avg. 1 Core Mixed IO Bench
22.4 GB/s -3% 23.1 GB/s +3%
SC Read
1 Core Read Bench
21.2 GB/s -4% 22.1 GB/s +4%
SC Write
1 Core Write Bench
37.7 GB/s +1% 37.5 GB/s -1%
SC Mixed
1 Core Mixed IO Bench
28.7 GB/s +2% 28.1 GB/s -2%
Latency
Avg. Physical RAM Latency
67.2 ns Slightly lower access latency.
+9%
74.2 ns -9%
Latency
Physical RAM Latency
55.7 ns +2% 56.6 ns -2%
Capacity
Capacity
16GB 16GB
Memory Kit Rankings (Price vs Performance) October 2017 RAM Rankings.

Welcome to our DDR4 Memory Kit comparison. We calculate effective RAM speed which measures performance for typical desktop users. Effective speed is adjusted by cost per GB to yield value for money. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top Memory Kits. Share your opinion by voting. [RAMPro]

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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-7700K $299Nvidia GTX 1070 $386Samsung 850 Evo 250GB $95
AMD Ryzen 7 1700 $280AMD RX 480 $508Samsung 850 Pro 256GB $126
Intel Core i5-7600K $230Nvidia GTX 1060-6GB $265Samsung 850 Evo 500GB $140
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $158SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $920SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $67Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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