Gen 3 vs Gen 4 SSD, The Key Difference

Gen 3 and Gen 4 SSDs are both types of solid-state drives that utilize the NVMe protocol for high-speed data transfer. However, there are several key differences between them which can significantly impact their performance and compatibility with various systems. The following are the most prominent distinctions between Gen 3 and Gen 4 SSDs:

PCIe Interface:

Gen 3 SSDs use the PCIe 3.0 interface, while Gen 4 SSDs are based on the newer PCIe 4.0 interface. PCIe 4.0 doubles the bandwidth per lane compared to PCIe 3.0, resulting in much faster data transfer speeds.

Data Transfer Speeds:

Gen 3 SSDs typically offer sequential read/write speeds in the range of 2,000-3,500 MB/s, while Gen 4 SSDs can achieve speeds up to 7,000 MB/s or more. The significant increase in transfer speeds makes Gen 4 SSDs more suitable for applications requiring high data throughput, such as video editing, gaming, and running virtual machines.


Although both Gen 3 and Gen 4 SSDs have low latency compared to traditional HDDs, Gen 4 SSDs offer even lower latency due to their increased bandwidth. This can result in quicker application loading times, faster boot times, and overall improved system responsiveness.

Power Consumption:

Gen 4 SSDs generally consume more power than their Gen 3 counterparts due to the increased bandwidth and speed capabilities. However, the difference in power consumption is usually negligible for most consumer systems and should not be a major concern.


Gen 4 SSDs require a compatible motherboard and CPU that support PCIe 4.0. As a result, they may not work with older systems or systems that do not have PCIe 4.0 support. Gen 3 SSDs, on the other hand, have broader compatibility as they can function on both PCIe 3.0 and 4.0 interfaces.


As Gen 4 SSDs are newer and offer significantly better performance, they tend to be more expensive than Gen 3 SSDs. Users on a budget may find that Gen 3 SSDs provide adequate performance for their needs at a lower price point.


the most significant difference between Gen 3 and Gen 4 SSDs lies in their data transfer speeds and overall performance. While Gen 4 SSDs offer superior speed and latency, they also require compatible hardware and tend to be more expensive. Gen 3 SSDs are more widely compatible and generally more affordable, making them suitable for users with older systems or budget constraints.