Crucial Ballistix MAX 4000MHz DDR4 16GB (2x8GB) RAM

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Crucial Ballistix MAX 4000MHz DDR4 16GB (2x8GB) CL18 BLM2K8G40C18U4B

Crucial Ballistix MAX 4000MHz DDR4 16GB (2x8GB) CL18 BLM2K8G40C18U4B

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  • Ideal For Extreme Overclocking Enthusiasts
  • Engineered For The Latest AMD And Intel Platforms
  • XMP 2.0 Support For Automatic Overclocking. Experts Can Manually Customize Timing Parameters
  • High-Quality Extruded Aluminum Heat Spreader For Max Heat Dissipation And Thermal Management
  • Precision Temp Sensor On DIMM Modules Designed To Monitor Thermals As You Push Performance Thresholds
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Specifications Overview

Model
  • BLM2K8G40C18U4B
  • BLM2K8G40C18U4BL
Release Date February 2020

* First availability for purchase, it may not correspond to the actual market launch date.

Type 288-pin DIMM DDR4
Speed DDR4-4000 MHz
Size 16GB (2 x 8GB)
CAS Latency 18
Timing 18-19-19-39
First Word Latency 9 ns
Voltage 1.35 V
Heat Spreader
ECC Support
Color Black

RAM First Word Latency Table (nanoseconds)

Latency is measured in nanoseconds, which is a combination of frequency and CAS. Both frequency increases and latency decreases result in better system performance (when latency is the same, always prefer higher frequency if possible).

Frequency (MT/s)

3400 3466 3600 3666 3733 3800 3866 4000 4133 4200 4266 4300 4333 4400
16 9.41 9.23 8.89 8.73 8.57 8.42 8.28 8.00 7.74 7.62 7.50 7.44 7.39 7.27
17 10.00 9.81 9.44 9.27 9.11 8.95 8.79 8.50 8.23 8.10 7.97 7.91 7.85 7.73
18 10.59 10.39 10.00 9.82 9.64 9.47 9.31 9.00 8.71 8.57 8.44 8.37 8.31 8.18
19 11.18 10.96 10.56 10.37 10.18 10.00 9.83 9.50 9.19 9.05 8.91 8.84 8.77 8.64
20 11.76 11.54 11.11 10.91 10.72 10.53 10.35 10.00 9.68 9.52 9.38 9.30 9.23 9.09
21 12.35 12.12 11.67 11.46 11.25 11.05 10.86 10.50 10.16 10.00 9.85 9.77 9.69 9.55
22 12.94 12.69 12.22 12.00 11.79 11.58 11.38 11.00 10.65 10.48 10.31 10.23 10.15 10.00
23 13.53 13.27 12.78 12.55 12.32 12.11 11.90 11.50 11.13 10.95 10.78 10.70 10.62 10.45
24 14.12 13.85 13.33 13.09 12.86 12.63 12.42 12.00 11.61 11.43 11.25 11.16 11.08 10.91
25 14.71 14.43 13.89 13.64 13.39 13.16 12.93 12.50 12.10 11.90 11.72 11.63 11.54 11.36
CAS (clock cycles) Lower latency means faster memory.

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