HyperXHX421C14FBK2/8
CorsairCMK16GX4M2A2666C16(|R)
Real World Speed
Performance profile from 7,605 user samples
4,437 User Benchmarks
Best Bench: 77% @ 3200 MHz
Worst Bench: 58% @ 2133 MHz
Poor: 58% Great: 77%
SPEED RANK: 43rd / 70
3,168 User Benchmarks
Best Bench: 93% @ 3100 MHz
Worst Bench: 61% @ 2133 MHz
Poor: 61% Great: 93%
SPEED RANK: 35th / 70
Effective Speed
Effective RAM Speed
71.4 % -9% 77.8 % Slightly faster effective speed.
+9%
MC Read
Avg. 16 Core Read Bench
26.2 GB/s -9% 28.6 GB/s Slightly faster multi-core read.
+9%
MC Write
Avg. 16 Core Write Bench
27.7 GB/s -8% 29.9 GB/s Slightly faster multi-core write.
+8%
MC Mixed
Avg. 16 Core Mixed IO Bench
21.7 GB/s -12% 24.3 GB/s Slightly faster multi-core mixed.
+12%
MC Read
16 Core Read Bench
28.5 GB/s -21% 34.5 GB/s Faster multi-core read.
+21%
MC Write
16 Core Write Bench
30 GB/s -21% 36.4 GB/s Faster multi-core write.
+21%
MC Mixed
16 Core Mixed IO Bench
23.6 GB/s -30% 30.6 GB/s Faster multi-core mixed.
+30%
Market Share
Based on 2,638,289 RAM Kits tested.
Market Share
Market Share (trailing 30 days)
0.5 % Much higher market share.
+67%
0.3 % -67%
Value
Value For Money
43.7 % -18% 51.7 % Better value.
+18%
User Rating
UBM User Rating
57 % -2% 58 % +2%
Price
Price (score)
$68 Much cheaper.
+43%
$120 -43%
Age
Newest
25 Months Slightly more recent.
+14%
29 Months -14%
SC Read
Avg. 1 Core Read Bench
16.2 GB/s -7% 17.3 GB/s Slightly faster single-core read.
+7%
SC Write
Avg. 1 Core Write Bench
26 GB/s -13% 29.5 GB/s Slightly faster single-core write.
+13%
SC Mixed
Avg. 1 Core Mixed IO Bench
21 GB/s -11% 23.3 GB/s Slightly faster single-core mixed.
+11%
SC Read
1 Core Read Bench
18.8 GB/s -11% 20.9 GB/s Slightly faster single-core read.
+11%
SC Write
1 Core Write Bench
30.4 GB/s -24% 37.6 GB/s Faster single-core write.
+24%
SC Mixed
1 Core Mixed IO Bench
24.3 GB/s -17% 28.5 GB/s Faster single-core mixed.
+17%
Latency
Avg. Physical RAM Latency
65.7 ns +3% 67.6 ns -3%
Latency
Physical RAM Latency
57.8 ns -3% 56 ns +3%
Capacity
Capacity
8GB 16GB
Memory Kit Rankings (Price vs Performance) March 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 $310AMD RX 480 $205Samsung 850 Evo 250GB $94
AMD Ryzen 7 1700 $330Nvidia GTX 1070 $370Samsung 850 Pro 256GB $130
Intel Core i5-7600K $215Nvidia GTX 1060-6GB $235Samsung 850 Evo 500GB $149
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $110SanDisk Extreme 64GB $34
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $430SanDisk Extreme 32GB $26
Seagate Barracuda 7200.14 1TB $50Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $9
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