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Old 26-02-14, 04:55 PM
cuylar cuylar is offline
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Question PCIe 16x

I'm in the process of of completing a $4,000 build and I need some advice.

I realize this is a motherboard question but it's directly related to the graphics cards.

I plan to be doing 1440p gaming with max settings and AA. I want my frame rates to be at least 120+. I've chosen the 780TI as my platform and I'll be doing SLI.

I think 2 cards at the moment will meet my needs.

My question relates to the PCIe slots.

Some boards like the Asus Rampage 4 Black can use 2 PCIe 3.0 slots at 16x... but other boards will only let you use one slot at 16x.... if you use 2 cards you will be limited to 8x.

How will the 16x in SLI vs the 8x in SLI matter to my frame rate?

Thank you in advance.

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  #2  
Old 26-02-14, 04:59 PM
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tinytomlogan tinytomlogan is offline
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Quote:
Originally Posted by cuylar View Post
I'm in the process of of completing a $4,000 build and I need some advice.

I realize this is a motherboard question but it's directly related to the graphics cards.

I plan to be doing 1440p gaming with max settings and AA. I want my frame rates to be at least 120+. I've chosen the 780TI as my platform and I'll be doing SLI.

I think 2 cards at the moment will meet my needs.

My question relates to the PCIe slots.

Some boards like the Asus Rampage 4 Black can use 2 PCIe 3.0 slots at 16x... but other boards will only let you use one slot at 16x.... if you use 2 cards you will be limited to 8x.

How will the 16x in SLI vs the 8x in SLI matter to my frame rate?

Thank you in advance.

I think the point here is 1440p - max settings 120FPS wont happen unless its crappy games - see the review below. So Id consider that before worrying about PCIE lanes.

http://www.overclock3d.net/reviews/g...d_sli_review/1
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  #3  
Old 26-02-14, 07:44 PM
cuylar cuylar is offline
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Originally Posted by tinytomlogan View Post
I think the point here is 1440p - max settings 120FPS wont happen unless its crappy games - see the review below. So Id consider that before worrying about PCIE lanes.

http://www.overclock3d.net/reviews/g...d_sli_review/1
Yikes... I guess I've been focusing on maximum fps in other articles read.

Ok... well thank you.
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Old 26-02-14, 09:29 PM
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Kaapstad Kaapstad is offline
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Originally Posted by cuylar View Post
Yikes... I guess I've been focusing on maximum fps in other articles read.

Ok... well thank you.
To answer your question using two cards on a RIVE BE @PCI-E 3.0 x16 compared to x8 gives very little difference in performance, less than 1%.
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Old 26-02-14, 10:49 PM
cuylar cuylar is offline
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Originally Posted by Kaapstad View Post
To answer your question using two cards on a RIVE BE @PCI-E 3.0 x16 compared to x8 gives very little difference in performance, less than 1%.
That must be a programming limitation though.... Or is it that the hardware isn't built to handle it?
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Old 27-02-14, 07:52 AM
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Kaapstad Kaapstad is offline
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Originally Posted by cuylar View Post
That must be a programming limitation though.... Or is it that the hardware isn't built to handle it?
There is more than enough bandwidth on PCI-E 2.0 x16 or PCI-E 3.0 x8 to handle any of todays top end cards.
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