Hey all, I recently came into an R810 and I'm having trouble getting SR-IOV working. I have checked several articles and the BIOS option simply isn't there. I'm running this with 4x E7-8870.
If you follow this link it will show the supported platforms for SR-IOV, which doesn't currently appear to include the R810. So it doesn't look to be supported on that platform.
Let me know if this helps, or if you have any other questions or concerns.
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