Question How did the Rocket Lake gain 4 extra PCI_E lanes.

john3850

Golden Member
Oct 19, 2002
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On Intels Ark page the Rocket Lake cpu has 20 PCI Express Lanes listed on the cpu and not the 500 series chipset.
I know for years the non Xeons i5 and i7 only had 16 lanes so how did they gain the 4 extra lanes.
 

Mopetar

Diamond Member
Jan 31, 2011
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Were some of those lanes previously reserved such that they were they, but not actually available?
 

dullard

Elite Member
May 21, 2001
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Rocket Lake isn't the same old rehashed Skylake. Rocket Lake is a backported 10 nm chip which includes a new PCI configuration. They added 4 PCIe lanes and switched from PCIe 3.0 to PCIe 4.0.
 
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kognak

Junior Member
May 2, 2021
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Rocket Lake isn't the same old rehashed Skylake. Rocket Lake is a backported 10 nm chip which includes a new PCI configuration. They added PCIe 4 lanes and switched from PCIe 3.0 to PCIe 4.0.
Also chipset link is x8 wide instead x4(needs 500-series board). But link is still PCIe 3.0 so not all lanes are 4.0 like current desktop ryzens.
 

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