DDR4 vs DDR5 RAM: Exploring the Differences and Advantages

by Sylvia January 13, 2025

Computer standards evolve rapidly, but the same cannot be said for random-access memory (RAM). DDR4 has been the standard for desktop computers since 2014, while DDR5 is only now gaining prominence. DDR5 offers higher base capacities, improved speed, new features for overclocking, and reduced power usage. DDR4 and DDR5 are not compatible with each other, and it is important to ensure you have the right type for your motherboard. DDR5 memory has higher clock speeds, improved overclocking options, and increased bandwidth compared to DDR4. Other changes include power management improvements, increased voltage headroom, and the inclusion of ECC on DDR5 memory. If you’re building a new PC, DDR5 is the way to go, unless you’re using old parts or upgrading an existing system. Prices for DDR5 have become more reasonable with wider availability.

DDR4 vs DDR5 RAM: Exploring the Differences and Advantages

– DDR5 memory offers higher base capacities, starting at 32 GB, compared to DDR4.
– DDR5 supports faster speeds, up to 6,400 MHz for consumer RAM.
– DDR5 has improved overclocking capabilities with Intel’s XMP 3.0 and offers increased bandwidth with a new architecture.

The modern types of RAM have been relatively unchanged for the past decade, while other computer standards have undergone rapid transformations. However, DDR5 has recently emerged as the new standard for desktop computers, surpassing DDR4 in terms of capacity, speed, and functionality. This article explores the key differences between DDR4 and DDR5 RAM.

One notable difference is the increase in base capacities for DDR5 memory. While 16 GB DDR4 kits were common, DDR5 kits typically start at 32 GB, usually in a 2 x 16 GB configuration. This change means that new systems will benefit from a higher baseline capacity, resulting in improved performance.

It’s important to note that DDR4 and DDR5 are not compatible with each other, even though they may look similar. Memory manufacturers will continue to offer both types for a while, so it’s crucial to double-check the compatibility with your motherboard before making a purchase. The physical difference between the two lies in the position of the notch in the pins at the bottom of the module. DDR5 has the notch centered, while DDR4 has it slightly offset. This shift in the notch prevents the installation of the wrong type of memory if properly aligned.

In terms of speed, DDR5 memory offers significant advancements. While DDR4 had a maximum speed of 3,200 MHz, DDR5 starts at that speed as the new standard and can reach speeds of up to 8,000 MHz. However, consumer DDR5 RAM typically tops out at around 6,400 MHz. These faster speeds contribute to improved overall performance.

Overclocking capabilities have also improved with DDR5, thanks to Intel updating XMP to version 3.0. DDR5 memory provides five profiles, three of which are set by the manufacturer, while the other two can be customized by the user. Additionally, despite having a higher CAS latency (at least 32 compared to DDR4’s 16), DDR5’s faster clock speeds result in better overall performance.

Another change in the DDR5 standard is the reduction in power consumption. While DDR5 memory uses less power overall, this doesn’t translate into the ability to use a smaller power supply. Instead, DDR5 allows manufacturers and overclockers more voltage headroom to achieve higher speeds. Additionally, each DDR5 memory stick now has its own power management chip, enhancing the consistency of performance when using XMP profiles.

DDR5’s architecture also brings increased bandwidth with a change to the basic structure of a memory DIMM. While DDR4 relied on a single 64-bit channel, DDR5 utilizes two 32-bit channels. Combined with the increased speed and efficiency, this allows for up to 2X the system bandwidth compared to DDR4, particularly in next-gen, multi-core CPUs.