Motherboard says PCIe 3.0, but chipset only supports PCIe 2.0. Who's right?
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Music by Eric Matyas
https://www.soundimage.org
Track title: Techno Bleepage Open
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Chapters
00:00 Question
01:20 Accepted answer (Score 45)
02:53 Thank you
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Full question
https://superuser.com/questions/1403316/...
Question links:
[Supermicro X10DRi]: https://www.supermicro.com/products/moth...
[Intel C612 chipset]: https://ark.intel.com/products/81759/Int...
Accepted answer links:
[Intel® Xeon® Processor E5-2620 v4]: https://ark.intel.com/products/92986/Int...-
[image]: https://i.stack.imgur.com/DYbI7.png
[Intel page for that chipset]: https://www.intel.com/content/www/us/en/...
[image]: https://i.stack.imgur.com/ZgYlS.png
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Tags
#graphicscard #motherboard #pciexpress #chipset
#avk47
ACCEPTED ANSWER
Score 45
Your CPU has 40 PCIe 3.0 lanes: Intel® Xeon® Processor E5-2620 v4
The communications with your GPUs will be direct from your CPU. This is good, after all the memory controller is also integrated on the CPU meaning that the fastest route for data in memory is from RAM -> CPU -> GPU rather than RAM - CPU -> Chipset -> GPU
The motherboard connects the PCIe connections from the CPU to GPU, but that does not mean that they need to pass through the chipset. They go direct from the CPU to the CPU served PCIe slots.
Somewhere in your motherboard documentation it should tell you if any of the PCIe slots are served by chipset or CPU. Chances are the chipset PCIe lanes are used to serve an m.2 slot or SATA controller. Possibly even USB3 or Gigabit Ethernet. How it is wired up and what to is down to the motherboard designer.
Found your effective chipset/CPU/GPU layout on the Intel page for that chipset:
