Rumor has it that the GeForce RTX 40 series will get a PCIe 4.0 interface

PCIe 5.0 debuted with Intel’s 12th Generation CPU and motherboard range, and AMD is ready to add support for its zen 4 platform later this year. It was widely assumed that next-gen graphics cards would support PCIe 5.0, but a new rumor suggests that Nvidia’s next-gen Ada GPUs won’t support the new standard.

The rumor comes from the reliable kopite7kimi (by video card). It’s a surprise since Nvidia’s enterprise-oriented Hopper architecture supports PCIe 5.0. There is also the fact that the RTX 40 will support 12+4 pins 12VHPWR PCIe 5.0 power connectors. But then so does the RTX 3090 Ti and it certainly doesn’t support PCIe 5.0.

If Nvidia decides to stick with PCIe 4.0, it probably won’t have any impact. It’s one more box to check the marketing value. A current high-end GPU loses almost nothing when running on a PCIe 3.0 16x vs 4.0 system, so the difference will be even smaller compared to PCIe 4.0 vs 5.0.

If Nvidia omits PCIe 5.0 support, it could save some valuable watts. It is believed that RTX 40 cards will consume unprecedented amounts of powertherefore, any savings that can be made mean that an extra handful of watts can be budgeted elsewhere.

Of course, this is just a rumor. Nvidia is notoriously tight-lipped when it comes to details about its unreleased products. It’s interesting to see the rumor mill increasing, indicating that the cards aren’t too far from release.

The letters are believed to have entered the testing phase, which means that the GPUs themselves have finished their design phase. Now it’s time to strike a balance between things like die yields and cropping, clock speeds, power requirements, and PCB designs.

The RTX 40 cards are expected to be built with TSMC’s 4N node, which has been tuned to specifically suit Nvidia. RTX 40 boards will feature a big increase in core count and cache size.

We can expect the RTX 40 series to launch in the second half of 2022. They’ll be up against AMD’s MCM RDNA3 models at the same time.

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