What is the difference between PCIe Gen 3 and PCIe Gen 4? - DIY in 5 Ep 170

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Published on 24 Apr 2022, 13:00
If you’re confused about the benefits PCIe 4.0 components offer over alternatives, we have the details you need! PCIe Gen 4 is the market standard interface for connecting high-speed components to motherboards, from SSDs to CPUs, GPUs, and beyond.

PCIe 4.0 doubles the data rate of its predecessor, PCIe 3.0. It runs more efficiently too, consuming less power. This means that it produces less heat. Performance for modular items like SSDs and graphics cards greatly benefits from upgrading to 4.0.

PCIe Gen 4 devices only achieve their potential in circumstances where the CPU and motherboard are compatible with the protocol. While initially only a handful of AMD motherboards were able to support PCIe Gen 4, these days there are many varieties of Intel and AMD motherboards that are compatible, as well as a range of CPUs.

People will sometimes conflate PCIe and NVMe. It is important to understand that NVMe is a protocol for SSDs, not an interface like PCIe. PCIe NVMe SSDs are far faster than SATA SSDs, but it should be noted that many recent PCIe NVMe SSDs were themselves having their top performance inhibited by the limitations of PCIe Gen 3. Gen 4 has resolved this bottleneck, meaning that PCIe NVMe SSDs are extremely fast compared to the last generation of SSDs. The majority of PCIe 4.0 NVMe SSDs on the market are in M.2 form factor, though others are available if required.

PCIe Gen 5 is already being rolled out, with Intel Gen 5 CPUs already available. However, these are not yet fully compatible with products on the market at present. Technology marches on, but for now, PCIe 4.0 offers the best performance possible for personal computers.

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Opening: 0:00
Intro: 0:27
About the PCIe Gen 4 Interface: 1:09
Supported Motherboards: 3:00
What is the difference between PCIe and NVME? : 3:40
Differences between Gen 3 and Gen 4 for SSDs: 4:07
What about PCIe Gen 5?: 4:44
Outro: 5:21

#DIYin5 #PCIe4 #PCIeGen4