ypsylon
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Re: Severe bottleneck on SLI 1080Ti's- please help
Friday, April 28, 2017 7:57 PM
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velo-x
you should be doing X99 with those cards. PCIE lanes matter hell of a lot with that setup. And also HB bridge. I didn't even try to SLI my 1080Ti because the CPU isnt up to task
That's a load of tosh and elemental lack of knowledge. No they don't. There isn't single VGA which can saturate x8 Gen.3 while gaming. Period with capital P. Neither of my VGAs is running in x16 mode and there is no adverse effect be it X99 or Z97 - ignoring server chipsets or things pre-UEFI. I'm running also quad-SLI on very average Asrock Z97 board with GTX690s and they doing just fine at x8, thank you very much. Shame that Mythbusters are no more, there is one to bust right here. Same old, same old. The only thing which can saturate x8 Gen.3 slot are loaded RAID/HBA controllers and I mean really SSD loaded or deep learning/modelling VGAs. X16 Gen.3 that's only ultra expensive server cards for quad NVMe drives. Gaming, Ha! Give me a break... @OP 4790K isn't a bad chip, but probably there are symptoms of it being overpowered by two immensely powerful VGAs. Technically it shouldn't matter, but at 4K it may be an issue. SLI with modern cards is total waste of money and time. If you really want to change platforms go X99 not Z170/270. 5820K + board is way better investment than 7700k+board. Massive cache on 2011-3 CPU alone is worth it price in gold - lousy 8MB vs 15MB. Its not even a fair contest.
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Pathway
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Re: Severe bottleneck on SLI 1080Ti's- please help
Friday, April 28, 2017 8:03 PM
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Slim415
I was so damn disappointed to find that my new EVGA SC 1080Ti's in SLI were barely an upgrade over my old SLI Titan X's (Maxwell). Im seeing maybe a 5-10FPS increase in gaming generally. I play at 4K games like Fallout, Witcher, Ghost Recon, The Division.
I had big problems especially with Ghost recon for a time(tho im not actually 4k) One problem was the driver. The first driver with 1080ti-release was not very good for SLI. There are two settings in Ghost recon that kills your fps and are more or less pointless imo 1. AntiAliasing = no actual use for it at that high resolution 2. TurfFX = Eats up 10fps+ when i turned that crap of i got 80-130 fps depending on which are i was in :) if you are using g-sync try turn it off and see what happens too :)
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velo-x
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Re: Severe bottleneck on SLI 1080Ti's- please help
Friday, April 28, 2017 8:30 PM
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ypsylon
velo-x
you should be doing X99 with those cards. PCIE lanes matter hell of a lot with that setup. And also HB bridge. I didn't even try to SLI my 1080Ti because the CPU isnt up to task
That's a load of tosh and elemental lack of knowledge.
No they don't. There isn't single VGA which can saturate x8 Gen.3 while gaming. Period with capital P. Neither of my VGAs is running in x16 mode and there is no adverse effect be it X99 or Z97 - ignoring server chipsets or things pre-UEFI. I'm running also quad-SLI on very average Asrock Z97 board with GTX690s and they doing just fine at x8, thank you very much.
Shame that Mythbusters are no more, there is one to bust right here. Same old, same old. The only thing which can saturate x8 Gen.3 slot are loaded RAID/HBA controllers and I mean really SSD loaded or deep learning/modelling VGAs. X16 Gen.3 that's only ultra expensive server cards for quad NVMe drives. Gaming, Ha! Give me a break...
@OP
4790K isn't a bad chip, but probably there are symptoms of it being overpowered by two immensely powerful VGAs. Technically it shouldn't matter, but at 4K it may be an issue. SLI with modern cards is total waste of money and time. If you really want to change platforms go X99 not Z170/270. 5820K + board is way better investment than 7700k+board. Massive cache on 2011-3 CPU alone is worth it price in gold - lousy 8MB vs 15MB. Its not even a fair contest.
so if its a load of tosh, how do you explain the difference in SLI scalling from the video between full lanes and a restricted setup? how come the difference is so big? did you even watch the video? edit besides, im not talking about lane saturation. im talking that somehow on a cpu with more lanes and on a mobo that does full 16 the scalling for SLI is much better.
post edited by velo-x - Friday, April 28, 2017 8:35 PM
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Gam3r26
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Re: Severe bottleneck on SLI 1080Ti's- please help
Friday, April 28, 2017 8:37 PM
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solution is simple... #singlegpuisthewaytogo SLI has waayy too many consistent problems with 85% of the games that ppl play on regular, thats why I decided most ost effective waty is a single powerful gpu and an ultrawide monitor. case closed.
I hope you fix your issue though.
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Slim415
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Re: Severe bottleneck on SLI 1080Ti's- please help
Saturday, April 29, 2017 0:27 PM
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I got my new EVGA HB SLI bridge in the mail today and that cleared almost everything up. I mean holy crap I went from doing 60FPS at 1440P on high settings yesterday and now im doing everything Ultra at 4K and im getting around 70FPS consistent and thats on Ghost Recon Wildlands. I cant believe those little stock SLI bridges screwed me so bad!!
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Slim415
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Re: Severe bottleneck on SLI 1080Ti's- please help
Saturday, April 29, 2017 0:33 PM
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And Witcher 3 constant 60 @4K even in the cities, AMAZING
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Sajin
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Re: Severe bottleneck on SLI 1080Ti's- please help
Saturday, April 29, 2017 0:44 PM
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Slim415
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Re: Severe bottleneck on SLI 1080Ti's- please help
Saturday, April 29, 2017 0:48 PM
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should i still upgrade what do you guys think?
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HeavyHemi
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Re: Severe bottleneck on SLI 1080Ti's- please help
Saturday, April 29, 2017 1:57 AM
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Slim415
should i still upgrade what do you guys think?
I think it's up to your wallet. We could all repeat the same things that are here and in other threads. At the end of the day is it worth it to you. I went from X58 to X99. So that was a major change. Yours would be more of incremental. Either way, you're looking at a few more FPS here or there.
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ipaine
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Re: Severe bottleneck on SLI 1080Ti's- please help
Saturday, April 29, 2017 5:45 AM
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Sorry for not posting in here sooner. I have a very similar setup only with a "slower" cpu 4770k. I will try to address a few of the things I have seen in the thread so far. - The message you were/are getting about the power supply surges worries me. I am not familiar with that Coolmax PSU you listed but I do not get any issues on my Corsair AX850, so yours should be up to the task. But don't risk it, a bad PSU can and will kill your entire system, just don't risk it. If you want a top notch PSU, then go with either a Corsair or an Evga, something like the SuperNova 1000W G3 or P2 would be great. And yes before someone comments, while my psu does cover my 1080ti fe sli, it is very close to the limit when benching so I would recommend 1000W or higher.
- I see comments about 16x vs 8x for the pci-e slots. So is there a difference if you are pushing the cards to their limits, yes, is it significant, well a little, maybe with SLI. Everything I have seen when using one card shows generally no more than 1-3% or so slower. But I did watch the video that velo-x linked to. After looking at that I do have one major question and that is if they are using a HB bridge or not. But that aside I did calculate the differences. They are; 1080p min 120% avg 119%, 1440p min 135% (battlefield had abnormal min on 8x, hence larger difference) avg 120.5%, 2160p min 112% avg 113%. So yes according to them there is a difference of 12-20% more fps, which is much higher than I would have thought considering the results for single cards. But like I said I don't know if they are using HB bridges or how they limited it to 8x etc. That said this is not the cause of your lower frames. It could be something to look at if someone with a 1080ti sli setup is getting better frames than you.
- Upgrading. Right now no. Like I said I have a similar system and I am also thinking about the upgrade. But when you consider the newer AMD chips and the newer Intel chips coming later this year I think that like me, you are better off waiting till Q3-Q4 to upgrade. Then you will be able to look at Coffee Lake and Skylake-X and such.
So reading through it seems like the HB bridge has helped everything out. But I would be very wary of that PSU of yours. Honestly you have way too nice of cards to risk them with a possible bad psu. Go pick up a 1000W G3 or hell go nuts and get the 1600W T2.
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Slim415
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Re: Severe bottleneck on SLI 1080Ti's- please help
Monday, May 01, 2017 1:13 AM
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Yep thanks for the advice, I grabbed a Corsair Platinum HXi 1000W yesterday.
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cars10
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Re: Severe bottleneck on SLI 1080Ti's- please help
Tuesday, July 03, 2018 5:54 PM
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No they don't. There isn't single VGA which can saturate x8 Gen.3 while gaming. We are talking about SLI, not single GPU. SLI does indeed saturate enough to the extent of a bottleneck. I understand your ignorance, however, as there is very little info on this. But if you dig deep enough and check out some of the very few people that actually have 24+ pcie lanes and SLI, you can clearly see the massive performance improvement from 16x/16x
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HeavyHemi
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Re: Severe bottleneck on SLI 1080Ti's- please help
Tuesday, July 03, 2018 6:08 PM
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cars10
No they don't. There isn't single VGA which can saturate x8 Gen.3 while gaming.
We are talking about SLI, not single GPU. SLI does indeed saturate enough to the extent of a bottleneck. I understand your ignorance, however, as there is very little info on this. But if you dig deep enough and check out some of the very few people that actually have 24+ pcie lanes and SLI, you can clearly see the massive performance improvement from 16x/16x
Necro, dude.
EVGA X99 FTWK / i7 6850K @ 4.5ghz / RTX 3080Ti FTW Ultra / 32GB Corsair LPX 3600mhz / Samsung 850Pro 256GB / Be Quiet BN516 Straight Power 12-1000w 80 Plus Platinum / Window 10 Pro
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cars10
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Re: Severe bottleneck on SLI 1080Ti's- please help
Tuesday, July 03, 2018 7:54 PM
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HeavyHemi
cars10
No they don't. There isn't single VGA which can saturate x8 Gen.3 while gaming.
We are talking about SLI, not single GPU. SLI does indeed saturate enough to the extent of a bottleneck. I understand your ignorance, however, as there is very little info on this. But if you dig deep enough and check out some of the very few people that actually have 24+ pcie lanes and SLI, you can clearly see the massive performance improvement from 16x/16x
Necro, dude.
yeah, but you find this thread when you search for SLI bottlenecks, and it's information is incorrect, so I thought it was worthwhile to add my 2ct
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GGTV-Jon
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Re: Severe bottleneck on SLI 1080Ti's- please help
Tuesday, July 03, 2018 8:01 PM
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Wow, he can resurrect an year old Post. The force is strong with this one
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