PCIe 4.0 has an insatiable appetite for data, handling up to twice the bandwidth of its predecessor, PCIe 3.0. At a throughput rate of 1 GB/s (gigabytes per second) per lane, PCIe 4.0 can move mountains of data in the blink of an eye.
If you’re looking for an interface that can deliver your data faster, PCIe 4.0 is the way to go. With a latency of just 125 nanoseconds, PCIe 4.0 is twice as fast as PCIe 3.0, which has a latency of 250 nanoseconds.
PCIe 4.0 is definitely the one to beat on the power efficiency front. With its more advanced features and higher power limits, it’s no surprise that it consumes more power than PCIe 3.0. However, the real difference lies in power efficiency.
PCIe 4.0 and PCIe 3.0 have some distinct variations in terms of compatibility. PCIe 4.0 devices can operate on PCIe 3.0 slots as PCIe is backward compatible, but they will only be able to reach the slower PCIe 3.0 speeds.