Obviously, things seem to be falling into place on the side of AMD and its mid-range cards. Indeed, it seems that the RX 7700 and RX 7600 use the same PCIe interface. However, unlike the current RX 7900, the cards would have a PCIe 4.0 x8 interface and not x16. The goal is to reduce costs!
PCIe 4.0 x8 for the RX 7700 and RX 7600?
Obviously, these two mid-range models will use a Navi33-based graphics chip. The latter will benefit from a PCIe 4.0 x8 interface while the Navi32 (RX 7800 XT/XTX) will be in PCIe 4.0 x16. Behind this, the aim of the maneuver is to save money in order to reduce the costs of these cards.
However, an x8 interface looks less “noble” on paper than a second one in x16. One could then fear for the performance with a possible bottleneck. But this is not the case in these power ranges, because when we switched an RTX 4090 to PCIe 3.0 x16, the performance losses were of the order of two to three percentage points on various games, according to TechpowerUp. You should also know that PCIe 3.0 x16 offers the same bandwidth as PCIe 4.0 x8. So there should be nothing to fear on the side of AMD cards, especially since an RTX 4090, it is not the same volume of data that is processed.
Navi 33: PCIe 4.0 x8
AD107: PCIe 4.0 x8
AD106: PCIe 4.0 x8
all other Ada/RDNA3: PCIe 4.0 x16PS:
MTT S80: PCIe 5.0 x16— 3DCenter.org (@3DCenter_org) February 7, 2023
Moreover, it seems that NVIDIA does the same for its less premium chips. Via a tweet from 3DCenter.org, we learn that the AD107 and AD106 GPUs would also be in PCIe 4.0 x8. As a reminder, these GPUs are intended for the RTX 4050/Ti and RTX 4060/Ti respectively.
