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

restsugavan
Level 13

Skylake X running PCIe 4.0 x 16 native.Skylake X running PCIe 4.0 x 16 native.

 

 

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

 

No need CPU upgrade for PCIe 4.0 x 16.No need CPU upgrade for PCIe 4.0 x 16.

 

W11CANARY 26002.1000 Core i9 7980XE 02007006 MCE ME 11.12.94.2479 R6E OFFICIAL BIOS 3801 SAMSUNG OG9 FW 1019.0 SSD 970 EVO PLUS 1 TB x 3 NVIDIA RTX 4090 GAME READY 546.29 64GB GSKILL DDR4 3200MHz JBL 9.1 Sound Bar DTS-X
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4 REPLIES 4

PanosXidis24
Level 11

can you explain what you say?

Murph_9000
Level 14

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.

Exactly.

restsugavan
Level 13

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. 

W11CANARY 26002.1000 Core i9 7980XE 02007006 MCE ME 11.12.94.2479 R6E OFFICIAL BIOS 3801 SAMSUNG OG9 FW 1019.0 SSD 970 EVO PLUS 1 TB x 3 NVIDIA RTX 4090 GAME READY 546.29 64GB GSKILL DDR4 3200MHz JBL 9.1 Sound Bar DTS-X