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gigabyte X58 UD9 sli spacing 16x pcie

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May 29, 2014 9:11:13 PM

Im looking into a Mobo upgrade for SLI

currently have a 980x @ 4.0ghz on a UD7 with a 780 ghz on a 2560x1440 @ 100hz

when i had sli 560ti the top card would reach 90 deg due no spacing between the cards (i know this is bad)

Im looking to sli 780 ghz but i want atleast 1 slot between the 2 cards for air

on the ud9 can i run in pcie 16 slot 1 and pcie 16 slot 3 and still get 16x out of both cards or does it have to be pcie slot 1 and 4. then the next problem is there a sli bridge long enough.
im not interested in new cpu's and boards as i would like to keep the 980x.

is there any other boards that will run with a space on sli eg asus rog or evga classy
and still give me 16x on both cards

thanks in advance
May 29, 2014 10:51:23 PM

with the UD9, you can have the cards in slot 1 and 3 and that is what i do with my motherboard, as temps are far less rather then having the cards a hairline apart.

Gigabyte states this;

4 x PCI Express x16 slots, running at x16 (PCIEX16_1/PCIEX16_2/PCIEX16_3/PCIEX16_4) (Note 2)

3 x PCI Express x16 slots, running at x8 (PCIEX8_1/PCIEX8_2/PCIEX8_3) (Note 3) (All PCI Express slots conform to the PCI Express 2.0)

Looking at this, your GPU config will be X16/X8 if in Slot 1 and 3, this is the same as X16/X16, X8/X8 and X16/X0 configurations, this is the best it can be. Go for the new motherboard, a viable solution to solve your temperature issues.
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May 30, 2014 2:52:29 AM

Hi thanks for the reply

I can run 16x and 8x on my current ud7 with a 2 slot space for air. This has a decent performance hit in games and on benchmark. I'm looking to run 2 780's at pcie 2.0 16x as one of the cards will bottle neck at 8x

I know 780's don't exceed the bandwidth of 16x but will exceed 8x on pcie 2

The ud9 has pcie config as
16x 8x 16x 8x 16x 8x 16x
1........................2

Can I run cards here and get 16x on both cards

If not possible I may as we'll stick with the board I have

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May 31, 2014 12:40:50 AM

X8 and X16 in SLI is no different, even with a GTX 780.
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June 1, 2014 3:24:41 PM

unknownofprob said:
X8 and X16 in SLI is no different, even with a GTX 780.


yes there is on pcie 2.0.

you may be getting confused as pcie 3.0 8x is equal to pcie 2.0 16x

no card will yet will exceed pcie 3.0 8x or pcie 2.0 16x but a 780 gtx will exceed the bandwidth of pcie 2.0 8x resulting in a bottle neck of the second card
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June 2, 2014 2:57:06 AM



it makes little difference with a single card but it makes a noticable difference is sli
it does make a difference on my sli 560 ti's i was getting atlease 5fps lower and loosing over 1000 points in fire strike and 3000 in vantage. im only looking to know if the ud9 can do 16x and 16x with a 2 slot gap if not im better off staying with the board i have
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June 2, 2014 5:30:08 PM

no, Even in SLI, the lane bandwidth (X8) is still relevant to double GPU's, you'd think that a single GPU in X8 would be limited, it's not. With SLI currently, any GPU configuration in X8/X8 will be the same as any other rig in X16/X16. With cards way down the track, it'll be different. The GTX 560Ti won't make a difference in X8/X8 also to say.
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June 2, 2014 6:27:05 PM

it does make a difference. now ill agree that its not a mind blowing difference but more like 5-10% i have tested the theory on my old 560ti's running them in 8x and 16x and there was a small 5-10% difference application depending. the only thing i want to know is can the UD 9 run two cards at 16x with atlease 1 free slot in the middle preferably 2. I will test the theory again i will run benchmarks on firestrike tonight with 1 run at 8x and 1 run at 16x. I know the performance hit is small but i know its there aswell. I can get my hands on a ud9 for $70 after i sell my old board.
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June 3, 2014 3:02:18 AM

I have just completed testing this in 3d mark if there is no difference then tell me how i have lost 694 points when all i did was move the card from the 16x slot to the 8x slot. all i did was move the card from 16x to 8x there is a performance difference weather you want to accept it or not. yes it is small but yes there is a difference unless you know of any other way im getting consistently different results. im happy to post any information you need to prove me wrong, bench settings, gpuz logs overclock settings. because if it is not the pcie 8x slot then there must be something elce causing my hardware to throttle

http://imageshack.com/a/img834/8762/ipkm.png
http://imageshack.com/a/img839/2449/bo4s.png
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June 3, 2014 3:11:31 AM

Not all systems are effected the same, some are different to others, as from where i get my sources from, bandwidth needed for SLI or Crossfire, X8 is enough, Your setup is different for some unknown reason but it can be due to your older setup compared to which modern day setups are tested on. The difference in modern day reviews with high end cards is about 0.001%, something that barely counts.
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June 3, 2014 3:29:39 AM

unknownofprob said:
Not all systems are effected the same, some are different to others, as from where i get my sources from, bandwidth needed for SLI or Crossfire, X8 is enough, Your setup is different for some unknown reason but it can be due to your older setup compared to which modern day setups are tested on. The difference in modern day reviews with high end cards is about 0.001%, something that barely counts.


I understand where your coming from and where your resources are from. most people see that the difference is less than 5% there for the assume that the performance difference is nothing and pass that information on. in some cases it may be nothing (like only getting 70-80% gpu usage on second card due to bottlenecking) but when you have no cpu bottle neck there is a difference in performance. i have read into this subject quiet thoroughly some get mimimal difference so they negate it. FYI i have no turbo boost or any of the step down settings to reduce my cpu and in gpuz log there is no difference between boost clock, memory and temps are under 60deg
newer chip sets contain pcie 3.0 so at 8x they are equiv to my 16x

all i really want to know is can the UD9 X58 board do a combination of 16x and 16x with a minimum 1 slot gap between the two cards. if yes great ill look in to one for the right price seeing as the performance increase is roughly 5% if not ill stay with my UD9. Thanks for the chat its been a good learning experience
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June 3, 2014 3:37:32 AM

I do realize that, I have also done research before I tend to post.

With motherboards, if you have the ability to run dual X16 (Slot 1 and 2), In BIOS, you should be able to change slot 2 to X8 and slot 3 or lower to X16.

My internet is running poorly currently, have a look at the Gigabyte X58 UD9 specs and check the slot speed and black/blue mode, if you see X16 in black/blue for more then 1 slot, X16/X16 is doable for slot 1 and 3 or greater.
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