Skylake X can crunch out PCI-E 4.0 x 16 native for RTX 40

[restsugavan]

Skylake X running PCIe 4.0 x 16 native.

Skylake running great on 16GT/s PCIe 4.0 x 16.

No need CPU upgrade for PCIe 4.0 x 16.

[PanosXidis24]

can you explain what you say?

[Murph_9000]

Your screenshots say the bus is running at 2.5 GT/s, which is PCIe 1.0 speed (the bus will drop its speed down automatically to save power).  Have you actually seen it running at a reported 16 GT/s?  I suspect HWiNFO is just telling you what the card's maximum capability is, but I don't think it will go beyond 8 GT/s due to both the CPU and the platform being PCIe 3.0.

Even the 10980XE is still PCIe 3.0 / 8 GT/s maximum, according to the Intel specs for it.

[Cherry_PL_]

Exactly.

[restsugavan]

Thank you everyone to correct me! 😁 The 4090 RTX paired with 7980XE running very fast. 

Compare to Gen 4 x 16 native system like Core i9 12900K almost identical performance.