Crucial

Crucial BLM2K8G51C19U4B Ballistix MAX 5100 MHz 16GB DDR4 Gaming Memory

4.8 (27312 reviews)
16GB DDR4

Push your DDR4 to the limit with Crucial Ballistix MAX 5100 MHz memory built for extreme overclocking.

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Overview

The Crucial Ballistix MAX BLM2K8G51C19U4B is a 16GB (2x8GB) DDR4 memory kit rated at an aggressive 5100 MHz, placing it firmly at the top end of DDR4 performance. Designed for enthusiasts who treat memory overclocking as a serious pursuit, the kit ships with an XMP 2.0 profile that lets you enable its rated speed with a single BIOS toggle. For those who want to go further, timing parameters can be manually tuned to squeeze out additional performance. Each module features a matte black extruded aluminum heat spreader that aids thermal dissipation during sustained high-frequency operation.

A standout feature is the on-DIMM temperature sensor built into each module, giving overclockers real-time thermal data as they push voltage and frequency thresholds. This is particularly valuable at 5100 MHz, where thermal management directly affects stability. The kit is compatible with current AMD and Intel platforms, though buyers should verify that their motherboard and CPU officially support memory speeds this high. At 16GB total, the kit is best suited to gaming and benchmarking rigs where clock speed matters more than raw capacity.

Key Features

Ideal for gamers and performance enthusiasts

Engineered for the latest AMD and Intel platforms

XMP 2.0 support for automatic overclocking, or run at JEDEC default profile

Modern aluminum heat spreader available in multiple colors to match your system build or style

Specifications

Memory Type
DDR4
Speed
5100 MHz
Capacity
16GB (2 x 8GB)
CAS Latency
CL19
Overclocking Support
XMP 2.0
Heat Spreader
Extruded Aluminum (Black)
Temperature Sensor
On-DIMM
Platform Compatibility
AMD and Intel
Form Factor
Desktop DIMM

Pros & Cons

👍 Pros

  • Extremely high 5100 MHz rated speed for competitive DDR4 overclocking
  • On-DIMM temperature sensor lets you monitor thermal performance during stress testing
  • Extruded aluminum heat spreader provides effective passive cooling under heavy loads
  • XMP 2.0 profile makes reaching rated speed a one-click BIOS setting

👎 Cons

  • 16GB total capacity may be limiting for heavy multitasking or memory-intensive workloads
  • Requires a high-end motherboard and CPU to reliably hit 5100 MHz
  • CL19 latency is relatively high compared to lower-speed kits with tighter timings
  • Premium pricing compared to mainstream DDR4 memory at lower frequencies

Frequently Asked Questions

This kit runs at CL19 timings at its rated 5100 MHz speed via XMP 2.0 profile.
Yes, each module has a built-in temperature sensor so you can monitor thermals in real time while pushing overclocks.
It is engineered for the latest AMD and Intel platforms, though achieving 5100 MHz may require a motherboard and CPU that support high memory frequencies.
Yes, the kit will run at JEDEC default speeds out of the box. You enable the 5100 MHz XMP 2.0 profile in your BIOS to reach rated speed.