NVIDIA is reportedly sticking with PCIe Gen4 for its upcoming Ada Lovelace-based RTX 40-series graphics cards revealed reputable leaker kopite7kimi. While NVIDIA already has PCIe Gen5 HPC GPUs, desktop graphics looks like it won’t be needing the bandwidth jump just yet. Resizeable bar is now implemented across most current-GPUs which should help increase data management with the GPU now able to see the entire memory space instead of smaller chunks.
As of now, storage will mostly be the main driving force behind faster PCI-E bandwidth with GPUs now facing a transition to ATX v3 standard which debuted on the RTX 3090 Ti. The ATX V3 specification will see power supplies provide power to GPUs which are expected to draw up to 600W on a single PCIe Gen5 power connector.
It should be noted that Microsoft’s DirectStorage technology will allow GPUs to utilize the SSDs on their host systems directly which should benefit from faster interconnect. As of now Microsoft is only support CPU acceleration for DirectStorage with GPU acceleration yet to follow.