What Should I Do With This GTX 1080 I Got?

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HarveyMatthew

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Jun 21, 2016
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I just got a GTX 1080 card for my system. Seems ridiculous to put it on a motherboard slot that is PCIe 3.0 x4.

But that's where I'm stuck.

I'm trying to juice my RAW video editing capabilities using the editing/coloring software Resolve.

(I don't do gaming)

I think I need to consider a different motherboard?? Not sure.

Currently I have a ASUS H170. The gray slot is x16 holding a GTX 970 and running 3 monitors, and the second PCIe slot is x4 holding the GTX 1080.

Resolve's config guide suggests that additional GPU's should just sit in a secondary PCI slot and not drive any monitors, just crunch numbers. If that slot can't handle the speed of the card though, seems I've throttled my system a bit, which stinks.

Any advice?
 
Solution
Math Geek
yah basically telling the computer which slot to output to the monitors. kind of like turning off the cpu's igp so it knows to use the pcie slot. same idea, just let's it know you want to use the second slot instead of the first one for monitors.
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Math Geek

Math Geek

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switch the cards and run the 970 from the x4 slot. it won't be slowed at all by the slower slot, while the 1080 is probably taking a small hit from it.

lots of testing showed a titan x was only hit a couple fps at 3.0 x4, so it won't have any effect on the 970.

now how to configure it to run the 970 as primary from the x4 slot is up to you to read the manual and figure out :)
 
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HarveyMatthew

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Jun 21, 2016
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What's the concept behind the need to adjust the BIOS settings? I suppose that might be an obvious question to many, but I'm ignorant. Is it something like telling the computer which piece of hardware to prioritize for running monitors, or...?

Are we talking IRQ assignments and such?


 
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Math Geek

Math Geek

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yah basically telling the computer which slot to output to the monitors. kind of like turning off the cpu's igp so it knows to use the pcie slot. same idea, just let's it know you want to use the second slot instead of the first one for monitors.
 
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Solution
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HarveyMatthew

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Jun 21, 2016
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Sounds like a good plan. Thanks for explaining the concept. I'd be curious if it made Resolve unstable, but if it worked and eeked out more number crunching bandwidth, that would certainly be beneficial and worthwhile.

Is it sorta obvious if I poked around in the BIOS? I haven't delved under the hood of Windows for decades and would hate to screw something up...but, really, thanks for giving me a bit of hope here.
 
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Math Geek

Math Geek

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just don't change anything you're not sure about. most manuals are pretty good at breaking down every setting in the bios so you know what it does.

doing the evening family thing, but if i get some time tomorrow, i can skim the manual and see what i can find. if you still need the help :)
 
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