CorsairCMK16GX4M4A2666C16(|B|R)
CorsairCMK16GX4M2B3000C15(|B|R)
Real World Speed
Performance profile from 21,470 user samples
984 User Benchmarks
Best Bench: 110% @ 3000 MHz
Worst Bench: 69% @ 2667 MHz
Poor: 69% Great: 110%
SPEED RANK: 17th / 70
20,486 User Benchmarks
Best Bench: 103% @ 3408 MHz
Worst Bench: 51% @ 2133 MHz
Poor: 51% Great: 103%
SPEED RANK: 27th / 70
Effective Speed
Effective RAM Speed
92.2 % Slightly faster effective speed.
+10%
83.5 % -10%
MC Read
Avg. 16 Core Read Bench
35.1 GB/s Slightly faster multi-core read.
+10%
32 GB/s -10%
MC Write
Avg. 16 Core Write Bench
36.5 GB/s Faster multi-core write.
+16%
31.4 GB/s -16%
MC Mixed
Avg. 16 Core Mixed IO Bench
31.7 GB/s Faster multi-core mixed.
+21%
26.2 GB/s -21%
MC Read
16 Core Read Bench
43.4 GB/s Slightly faster multi-core read.
+6%
41 GB/s -6%
MC Write
16 Core Write Bench
48.1 GB/s Faster multi-core write.
+21%
39.8 GB/s -21%
MC Mixed
16 Core Mixed IO Bench
40.1 GB/s Faster multi-core mixed.
+18%
33.9 GB/s -18%
Market Share
Based on 3,541,231 RAM Kits tested.
Market Share
Market Share (trailing 30 days)
0.04 % -3,425% 1.41 % Insanely higher market share.
+3,425%
Value
Value For Money
56.3 % Slightly better value.
+11%
50.7 % -11%
User Rating
UBM User Rating
52 % -33% 69 % Much more popular.
+33%
Price
Price (score)
$120 Slightly cheaper.
+6%
$127 -6%
Age
Newest
33 Months -3% 32 Months +3%
SC Read
Avg. 1 Core Read Bench
16.2 GB/s -18% 19.1 GB/s Faster single-core read.
+18%
SC Write
Avg. 1 Core Write Bench
24.8 GB/s -27% 31.4 GB/s Faster single-core write.
+27%
SC Mixed
Avg. 1 Core Mixed IO Bench
22.2 GB/s -12% 24.8 GB/s Slightly faster single-core mixed.
+12%
SC Read
1 Core Read Bench
21 GB/s -10% 23.2 GB/s Slightly faster single-core read.
+10%
SC Write
1 Core Write Bench
37.7 GB/s -11% 41.9 GB/s Slightly faster single-core write.
+11%
SC Mixed
1 Core Mixed IO Bench
28.7 GB/s -8% 31 GB/s Slightly faster single-core mixed.
+8%
Latency
Avg. Physical RAM Latency
65 ns Slightly lower access latency.
+7%
70.1 ns -7%
Latency
Physical RAM Latency
55.7 ns -11% 49.6 ns Slightly lower access latency.
+11%
Capacity
Capacity
16GB 16GB
Memory Kit Rankings (Price vs Performance) June 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]

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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.

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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

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The Best.
CPUGPUSSD
Intel Core i7-7700K $307Nvidia GTX 1070 $390Samsung 850 Evo 250GB $100
AMD Ryzen 7 1700 $278AMD RX 480 $608Samsung 850 Pro 256GB $130
Intel Core i5-7600K $225Nvidia GTX 1060-6GB $239Samsung 850 Evo 500GB $160
HDDRAMUSB
Seagate Barracuda 1TB (2016) $42Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $83G.SKILL Trident Z DDR4 3200 C14 4x16GB $696SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46HyperX Fury DDR4 2133 C14 2x8GB $133SanDisk Ultra Fit 32GB $13
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