HyperXHX421C14FBK2/8
CorsairCMD64GX4M4B3000C15
Real World Speed
Performance profile from 6,212 user samples
6,186 User Benchmarks
Best Bench: 78% @ 3333 MHz
Worst Bench: 43% @ 2133 MHz
Poor: 43% Great: 78%
SPEED RANK: 45th / 70
26 User Benchmarks
Best Bench: 140% @ 3000 MHz
Worst Bench: 74% @ 2133 MHz
Poor: 74% Great: 140%
SPEED RANK: 5th / 70
Effective Speed
Effective RAM Speed
70.8 % -39% 98.7 % Much faster effective speed.
+39%
MC Read
Avg. 16 Core Read Bench
26 GB/s -43% 37.3 GB/s Much faster multi-core read.
+43%
MC Write
Avg. 16 Core Write Bench
27.4 GB/s -40% 38.3 GB/s Much faster multi-core write.
+40%
MC Mixed
Avg. 16 Core Mixed IO Bench
21.6 GB/s -62% 35 GB/s Much faster multi-core mixed.
+62%
MC Read
16 Core Read Bench
28.8 GB/s -99% 57.4 GB/s Hugely faster multi-core read.
+99%
MC Write
16 Core Write Bench
30.1 GB/s -117% 65.2 GB/s Hugely faster multi-core write.
+117%
MC Mixed
16 Core Mixed IO Bench
23.8 GB/s -122% 52.9 GB/s Hugely faster multi-core mixed.
+122%
Market Share
Based on 2,915,826 RAM Kits tested.
Market Share
Market Share (trailing 30 days)
0.3 % Insanely higher market share.
+∞%
0 % -∞%
Value
Value For Money
40 % -4% 41.8 % +4%
User Rating
UBM User Rating
56 % -4% 58 % +4%
Price
Price (score)
$74 Hugely cheaper.
+89%
$669 -89%
Age
Newest
26 Months -31% 18 Months Much more recent.
+31%
SC Read
Avg. 1 Core Read Bench
16.2 GB/s -6% 17.2 GB/s Slightly faster single-core read.
+6%
SC Write
Avg. 1 Core Write Bench
25.8 GB/s -4% 26.9 GB/s +4%
SC Mixed
Avg. 1 Core Mixed IO Bench
21 GB/s -15% 24.2 GB/s Faster single-core mixed.
+15%
SC Read
1 Core Read Bench
18.7 GB/s -18% 22.1 GB/s Faster single-core read.
+18%
SC Write
1 Core Write Bench
30.4 GB/s -38% 41.9 GB/s Much faster single-core write.
+38%
SC Mixed
1 Core Mixed IO Bench
24.3 GB/s -32% 32 GB/s Much faster single-core mixed.
+32%
Latency
Avg. Physical RAM Latency
66.4 ns -7% 61.6 ns Slightly lower access latency.
+7%
Latency
Physical RAM Latency
58.1 ns -8% 53.5 ns Slightly lower access latency.
+8%
Capacity
Capacity
8GB 64GB
Memory Kit Rankings (Price vs Performance) April 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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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 $339Nvidia GTX 1070 $330Samsung 850 Evo 250GB $100
Intel Core i5-7600K $229AMD RX 480 $210Samsung 850 Pro 256GB $140
AMD Ryzen 7 1700 $320Nvidia GTX 1060-6GB $215Samsung 850 Evo 500GB $175
HDDRAMUSB
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $35
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $137SanDisk Ultra Fit 32GB $9
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