cabbage
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new build. specs below. I thought something was off so I benchmarked the cards just now. I thought mabey it was precision, so I installed msi. still. I have the cards in slots 1 and 3 because if I use 1 and 2 they would be mashed together. the mobo is an evga ftw with the latest bios. in the bios I have pci config to slot 1[gen3] and slot 3[gen3] the graphics option is at default. any ideas? thanks in advance
NZXT switch 810
Dell 2560x1440p 144hz gsync
i5 6600k 4.4ghz
Gskill 8gb 2400mhz
evga Z170 FTW
eVga 980ti SC SLI
corsair 1000wt psu
noctua cpu cooler
corsair force gt 180gb
WD 500gb storage
WD 300gb velociraptor
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BrandonS
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Re: sli not working.gpu 2
2016/07/23 14:39:50
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Unfortunately you will need to put the cards in slots 1 and 2; these are the only slots that provide at least x8 speed, which is required for SLI. You can see this information on page 11 of the Z170 FTW Manual.
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cabbage
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Re: sli not working.gpu 2
2016/07/23 14:45:27
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that is a huge bummer. had I known that I would have bought the stinger. could this be causing some games ive played before to crashing?
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cabbage
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Re: sli not working.gpu 2
2016/07/23 18:38:36
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this whole build has been a huge disappointment. first I had to rma the asus sabertooth mobo. ordered the FTW. now I cant use my 2nd 980ti. no usb3.0 ports work on it even though I was on the phone with tech support for an hour. doom keeps crashing. black ops 3 runs, but I cant get better than 50fps. and some little stuff. cant install google toolbar. cant run unigen benchmarks. I might have to return this board as well because of the usb 3.0 issue. if I do, ill have to go with a different brand because I want to use both cards and have to start the whole research process all over again
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ty_ger07
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Re: sli not working.gpu 2
2016/07/23 18:44:49
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cabbage
this whole build has been a huge disappointment. first I had to rma the asus sabertooth mobo. ordered the FTW. now I cant use my 2nd 980ti.
Yes you can use your 2nd 980Ti. But, in order to use it, you need to use slot 1 and 2 instead of slot 1 and 3. SLI requires at least 8x PCI-E link width. I know you are worried about the reduced airflow and temperature. I guess you will have to decide which is more important to you. If you are unwilling to use slot 1 and 2, you might as well remove the 2nd 980Ti and find another use for it.
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cabbage
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Re: sli not working.gpu 2
2016/07/23 18:54:56
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if there was any gap at all I would use it. but the back of the 2nd card literally rubs against the bottom of the 1st completely blocking the fan
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ty_ger07
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Re: sli not working.gpu 2
2016/07/23 19:09:04
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cabbage
if there was any gap at all I would use it. but the back of the 2nd card literally rubs against the bottom of the 1st completely blocking the fan
Yes, I know. Is it an ACX card or NVIDIA reference design? If it is an ACX card part number 06G-P4-4993-xx, then I would understand your concern to a greater degree. If it is a NVIDIA reference design part number 06G-P4-4990-xx, then it is specifically designed to work just fine with one card against the other card. Either way, your video cards have warranties and if one of them ever broke because they were too close together in SLI, your warranty would cover you to get a replacement. If you absolutely refuse to use the cards in SLI sandwiched together, that is your decision and you aren't going to get a lot of pity from anyone here.
post edited by ty_ger07 - 2016/07/23 19:15:41
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cabbage
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Re: sli not working.gpu 2
2016/07/23 19:29:49
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ty_ger07
cabbage
if there was any gap at all I would use it. but the back of the 2nd card literally rubs against the bottom of the 1st completely blocking the fan
Yes, I know.
Is it an ACX card or NVIDIA reference design? If it is an ACX card part number 06G-P4-4993-xx, then I would understand your concern to a greater degree. If it is a NVIDIA reference design part number 06G-P4-4990-xx, then it is specifically designed to work just fine with one card against the other card.
Either way, your video cards have warranties and if one of them ever broke because they were too close together in SLI, your warranty would cover you to get a replacement.
If you absolutely refuse to use the cards in SLI sandwiched together, that is your decision and you aren't going to get a lot of pity from anyone here.
pity? no. im not looking for that. but thanks for your input
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arestavo
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Re: sli not working.gpu 2
2016/07/23 19:48:39
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If you have the option to return the board and CPU, I would do so. Then buy the X99 platform which doesn't have that problem. I know my X99 classified with a 5820K doesn't have that issue. If you can't return them you can use folded scraps of cardboard between the two cards to open up the airspace between the ACX cards. If you try this, be VERY careful not to put too much strain on the cards as you can damage the PCIE slots. The only thing else to do is make sure you have very good airflow in your case - plenty of intake and exhaust fans - the reason for that is ACX cards just dump hot air into the case, and it needs cool air coming in and the hot air exhausted. ACX really isn't a good option for SLI with small cases, or even medium size cases, unless you have crazy good airflow. If all else fails, you can always contact EVGA to see if they will exchange your ACX cards for blower style cards. It's a long shot, but they just might since you didn't know about the limitation on your EVGA motherboard - just mention that and it might help! http://www.evga.com/about/contactus/
post edited by arestavo - 2016/07/23 19:50:52
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Cool GTX
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Re: sli not working.gpu 2
2016/07/23 20:28:02
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Not sure which GPU you have ?
06G-P4-4993-KR EVGA GeForce GTX 980 Ti SC GAMING ACX 2.0+
Custom water loop time, you know you want it
OR
06G-P4-4992-KR EVGA GeForce GTX 980 Ti SC GAMING
just add some HYBRID Water Cooler (All in One) for GTX 1080 and 1070
P/N: 400-HY-5188-B1
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ty_ger07
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Re: sli not working.gpu 2
2016/07/23 20:29:12
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arestavo
If you can't return them you can use folded scraps of cardboard between the two cards to open up the airspace between the ACX cards. If you try this, be VERY careful not to put too much strain on the cards as you can damage the PCIE slots. The only thing else to do is make sure you have very good airflow in your case - plenty of intake and exhaust fans - the reason for that is ACX cards just dump hot air into the case, and it needs cool air coming in and the hot air exhausted. ACX really isn't a good option for SLI with small cases, or even medium size cases, unless you have crazy good airflow.
If all else fails, you can always contact EVGA to see if they will exchange your ACX cards for blower style cards. It's a long shot, but they just might since you didn't know about the limitation on your EVGA motherboard - just mention that and it might help! http://www.evga.com/about/contactus/
We don't know if he does have ACX cards. At least not by this thread alone. Maybe you know the user better and know from other threads which cards he has? The card he listed can be purchased in either ACX or reference "blower" form. IF the user has blower cards, the user doesn't really have anything to worry about in the first place (in my opinion). EDIT: According to one of his threads, he has blower style cards. So, he has nothing to be concerned about in the first place. Those blower cards were designed by NVIDIA to be smashed together in SLI configurations with no additional airflow space and continue working just fine for the entire length of their warranty. http://forums.evga.com/980ti-SC-cooling-solution-solved-m2464556.aspx
post edited by ty_ger07 - 2016/07/23 20:36:15
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arestavo
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Re: sli not working.gpu 2
2016/07/23 20:41:55
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That being the case he's good to go!
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cabbage
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Re: sli not working.gpu 2
2016/07/24 01:40:59
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that's the Z77 build. I bought the same case in white for the Z170.
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ty_ger07
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Re: sli not working.gpu 2
2016/07/24 02:33:00
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cabbage
that's the Z77 build. I bought the same case in white for the Z170.
You are missing the point. The point is that the GTX 980Ti cards appear to be the NVIDIA reference style cards with the blower fan.
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mike406
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Re: sli not working.gpu 2
2016/07/24 14:39:22
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If you have reference designs there should not be any issues having the cards that close. That being said, in my opinion EVGA moving forward should rethink their motherboard design and make the third slot an x8 and not the 2nd one. After all, EVGA specializes and are renowned for their ACX cooler, yet it's a terrible solution to use their ACX cards (or any aftermarket air cooled card for that matter) in SLI with their own motherboard design...Doesn't make any sense why they went this route.
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ty_ger07
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Re: sli not working.gpu 2
2016/07/24 16:12:18
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mike406
If you have reference designs there should not be any issues having the cards that close. That being said, in my opinion EVGA moving forward should rethink their motherboard design and make the third slot an x8 and not the 2nd one. After all, EVGA specializes and are renowned for their ACX cooler, yet it's a terrible solution to use their ACX cards (or any aftermarket air cooled card for that matter) in SLI with their own motherboard design...Doesn't make any sense why they went this route.
While I agree with you that it makes no sense in the eyes of the consumers to have both x8 slots one slot apart, it does make sense for one reason: design and manufacturing. If the slots with the most link width are as close to the CPU as possible, it is less distance and less complexity to route those traces between those slots and the CPU. I think that is the only reason why EVGA chose the slots they chose. In the future, I think EVGA should avoid this practice as much as possible.
ASRock Z77 • Intel Core i7 3770K • EVGA GTX 1080 • Samsung 850 Pro • Seasonic PRIME 600W Titanium
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