Am I totally screwed here? [gtx980ti x 2]

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nickm323

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Jan 8, 2016
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I recently made the jump to get a second 980ti as I am doing heavy 3D rendering stuff, and I knew my msi x99s would support it. I installed the second card into the only slot that made sense airflow-wise, PCIe-5, to give a gap between cards. My CPU (Intel Core i7-5820K 3.3GHz 6-Core Processor) and mobo (x99s) support 40 lanes, so I figured I would be good.

I installed the card into the PCIe-5 slot but the computer was reading it as empty. I did some research and learned that the lanes for my cpu and mobo are x16/x16/x0/x8, meaning the PCIe-5 slot will not work (I guess?). I tried installing the card into the last slot but it will not fit, leaving me with only the top two slots and zero breathing room for either card. After a few tests, it appears this is not a sustainable option without the cards overheating (I want to render things over night and not fear that my computer is going to melt).

Is there anything I can do to fix this problem? What would you do in my situation? Any help would be much appreciated.

Cheers.
 
Solution
17seconds
I'm assuming by "overheating" he's getting in the low 80c's, up to 84c. That's exactly normal since that is the default temperature target for Turbo Boost. Some people tend to get alarmed at 80c+, but I've found that often they are generally unaware or misinformed of how Turbo Boost works.
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jragonsoul

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Jun 5, 2009
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You get this figured out?
 
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bystander

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What is your motherboard. Most motherboards these days space the first 2 PCIe x16 slots with 2 slots between them.

I might also bring to your attention that while the x99 motherboards support 40 lanes, the i7 5820K only supports 28, but that isn't generally a concern.
 
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jragonsoul

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Unfortunately from MSI's site the OP is right
• 4 x PCIe 3.0 x16 slots, support up to 3-way mode
- 1-way mode: x16/ x0/ x0/ x0
- 2-way mode: x16/ x16/ x0/ x0*, 16/ x8/ x0/ x0** (Need's 3 to use the 3rd slot at all)
- 3-way mode: x16/ x16/ x0/ x8*, x8/ x8/ x8/ x0** (Need's 3 to use the 3rd slot at all)
* For the CPU that supports 40 PCIe lanes
** For the CPU that supports 28 PCIe lanes
Source (X)
So the only option is 3 GPU's but that still won't fix the issue of 2 being next to each other.
 
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bystander

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Do you know what motherboard he has? My x99 motherboard has 2 spaces between the 1st and 2nd PCIe x16 slot, giving plenty of air flow. I have not seen many exceptions in the last 5 years, unless the board was designed for 4 way.

As far as to the i7 5820K, it has 28 lanes. That is why they have the * and ** options to signify that it is CPU dependent.

I do see there is a MSI x99x Plus, which is designed with no space so it can support more cards. Is that what he has? He said MSI x99s, which might mean any of many MSI x99 boards.
 
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17seconds

17seconds

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I'm assuming by "overheating" he's getting in the low 80c's, up to 84c. That's exactly normal since that is the default temperature target for Turbo Boost. Some people tend to get alarmed at 80c+, but I've found that often they are generally unaware or misinformed of how Turbo Boost works.
 
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