Famous informant @ Kepler_ L2 just shared more details about AMD rnda 3 graphics architecture on twitter. Recently, he has been mining information related to rnda 3 GPU in driver and patch information The latest news is that Navi 31 GPU for radeon RX 7000 series flagship graphics card is expected to support PCIe 5.0 x16 interface @ 128 GB / s transmission rate
Recall the radeon RX 5000 and HD 7000 series, amd was the first to introduce support for PCIe 4.0 / 3.0 bus.
At the same time, NVIDIA has used the 16 pin (12vhpwr) power supply port of "PCIe 5.0-ready" for ampere Kahuang geforce RTX 3090 ti.
That's why we are not surprised by the PCIe 5.0 support of radeon RX 7000 Series graphics cards.
The biggest benefit of PCIe 5.0 is the easy doubling of transmission rate - from 64 GB / S (16 GT / s) to 128 GB / S (32 GT / s).
As a reference, the current amd rDNA 2 "Navi 2x" GPU supports PCIe 4.0, but the interface rate has been reduced from full x16 to X8 and X4 in turn.
In addition, @ Kepler_ L2 only declares that Navi 31 supports PCIe 5.0, so other I / O specifications of "Navi 3x" may also be "cut".
It is also rumored that NVIDIA geforce RTX 40 Series graphics cards may still use the PCIe 4.0 protocol even if equipped with a "PCIe 5.0-ready" power interface that supports up to 600W power consumption.
However, on AMD's side, radeon RX 7000 Series graphics cards are unlikely to rashly use 12vhpwr power supply interface while supporting PCIe 5.0 protocol.
It is reported that ATX 3.0 power specification has more stringent requirements on "power offset", which means that 12vhpwr equipment users need to carefully choose to upgrade their power supply.