CrucialBLS4K4G4D240FSA
CorsairCMK16GX4M2A2666C16(|R)
Real World Speed
Performance profile from 6,166 user samples
410 User Benchmarks
Best Bench: 113% @ 2400 MHz
Worst Bench: 72% @ 2400 MHz
Poor: 72% Great: 113%
SPEED RANK: 5th / 70
5,756 User Benchmarks
Best Bench: 94% @ 1467 MHz
Worst Bench: 43% @ 3000 MHz
Poor: 43% Great: 94%
SPEED RANK: 36th / 70
Effective Speed
Effective RAM Speed
99.3 % Faster effective speed.
+28%
77.5 % -28%
MC Read
Avg. 16 Core Read Bench
38.7 GB/s Much faster multi-core read.
+33%
29.2 GB/s -33%
MC Write
Avg. 16 Core Write Bench
39.8 GB/s Much faster multi-core write.
+36%
29.2 GB/s -36%
MC Mixed
Avg. 16 Core Mixed IO Bench
35.6 GB/s Much faster multi-core mixed.
+44%
24.7 GB/s -44%
MC Read
16 Core Read Bench
45.5 GB/s Faster multi-core read.
+21%
37.6 GB/s -21%
MC Write
16 Core Write Bench
47 GB/s Much faster multi-core write.
+31%
35.8 GB/s -31%
MC Mixed
16 Core Mixed IO Bench
41 GB/s Faster multi-core mixed.
+30%
31.6 GB/s -30%
Market Share
Based on 3,847,462 RAM Kits tested.
Market Share
Market Share (trailing 30 days)
0.01 % -2,600% 0.27 % Insanely higher market share.
+2,600%
Value
Value For Money
44.2 % -8% 47.7 % Slightly better value.
+8%
User Rating
UBM User Rating
55 % -5% 58 % Slightly more popular.
+5%
Price
Price (score)
$159 -18% $130 Cheaper.
+18%
Age
Newest
35 Months -6% 33 Months Slightly more recent.
+6%
SC Read
Avg. 1 Core Read Bench
15.2 GB/s -16% 17.6 GB/s Faster single-core read.
+16%
SC Write
Avg. 1 Core Write Bench
20.5 GB/s -40% 28.6 GB/s Much faster single-core write.
+40%
SC Mixed
Avg. 1 Core Mixed IO Bench
20.9 GB/s -10% 22.9 GB/s Slightly faster single-core mixed.
+10%
SC Read
1 Core Read Bench
18.2 GB/s -19% 21.6 GB/s Faster single-core read.
+19%
SC Write
1 Core Write Bench
24.7 GB/s -50% 37.1 GB/s Much faster single-core write.
+50%
SC Mixed
1 Core Mixed IO Bench
24.3 GB/s -15% 28 GB/s Faster single-core mixed.
+15%
Latency
Avg. Physical RAM Latency
63.9 ns Slightly lower access latency.
+12%
72.9 ns -12%
Latency
Physical RAM Latency
54.7 ns +4% 56.7 ns -4%
Capacity
Capacity
16GB 16GB
Memory Kit Rankings (Price vs Performance) July 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 $295Nvidia GTX 1070 $390Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $268AMD RX 480 $375Samsung 850 Pro 256GB $120
Intel Core i5-7600K $235Nvidia GTX 1060-6GB $32Samsung 850 Evo 500GB $165
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $83G.SKILL Trident Z DDR4 3200 C14 4x16GB $714SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $40HyperX Fury DDR4 2133 C14 2x8GB $140SanDisk Ultra Fit 32GB $13
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback