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PowerEDGE and PCIe

#1

Hi All,

Wondering if anyone can shed some light on why a GTX1070 won’t achieve PCIe 3.0 in a Dell PowerEDGE T620.

The motherboard is PCIe 3.0 compatible same with the CPUs installed.
It’s not a huge issue especially seeing how all the 1070 does is provide hardware acceleration for Plex, it has me baffled non the less.

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#2

No one has come across this or has any input at all? I find that rather odd.

Maybe this is the usual shunning of new users to forums - point me towards your right of passage.

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#3

Is there any BIOS options that allow you to change the PCIe generation on the slots?

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#4

Hey 2bitmarksman, thanks for dropping a reply :slight_smile:

Unfortunately no, the only BIOS settings that would effect PCIe performance would be global power/performance settings and possibly the power budget which are set to high performance with no power budget respectively.

Here is a pic of the BIOS submenus available for configuration.
If anything sticks out to you let me know and i’ll take a deep dive.

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#5

Have you checked it under load to see it is changes?

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#6

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#7

It seems to be an issue with x79 motherboards.
Think I’ve fixed it with some googling - just doing some testing now and will report back.

-edit-
Okay, so i followed some instructions on another forum about adding a reg key to the GFX card config which forces it into PCIe 3.0 speeds on x79 platforms.
This worked so I then removed the key (which after a reboot reverted the card back to PCIe 2.0) and used nVidias force-enable-gen3 tool instead, this essentially does the same thing and adds the reg key back in.

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#8

Interesting problem and fix. Neat!

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