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1080 TI vs 1080 TI SLI vs 2080 TI Personal Review

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post #21 of 29 (permalink) Old 02-26-2019, 06:07 AM
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Oh yeah, I just wanted to point out that debating the lanes thing isn't relevant anyway and I never should have said anything about it. I'm sorry.
The implication that was silly was recommending that someone shouldn't have used their hardware to post their personal experience. Why would someone use anything but their own gear to benchmark their own gear?

The point of this site is to share your experience/results with members of the community, the hardware used is almost irrelevant. If you're going to recommend something other than the OPs hardware at least be constructive. Telling someone they should have used hardware they didn't use negates the entire reason they'd have run the benchmark on their rig.

OP, I'm sorry I helped derail your thread, please don't let this be the end of you sharing your upgrades and experiences, you wouldn't believe how many times some random person's benchmark helped me.

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post #22 of 29 (permalink) Old 02-26-2019, 06:09 AM
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The video is actually an enhanced version of this
hence why it's written in the later video the tests are archival. Part of them just came out in january of 2017, latter were made one by one, platform change happened in the meanwhile and to keep score consistency the CPU was not changed. But it was all done on HB Bridges.


Quote: Originally Posted by white owl View Post
Oh yeah, I just wanted to point out that debating the lanes thing isn't relevant anyway and I never should have said anything about it. I'm sorry.
The implication that was silly was recommending that someone shouldn't have used their hardware to post their personal experience. Why would someone use anything but their own gear to benchmark their own gear?

The point of this site is to share your experience/results with members of the community, the hardware used is almost irrelevant. If you're going to recommend something other than the OPs hardware at least be constructive. Telling someone they should have used hardware they didn't use negates the entire reason they'd have run the benchmark on their rig.

OP, I'm sorry I helped derail your thread, please don't let this be the end of you sharing your upgrades and experiences, you wouldn't believe how many times some random person's benchmark helped me.


Thing is not about against posting personal experience but about making a mistake of doing SLI set-up on a mainstream 16 lanes CPU. If he'd gone with an even old HEDT like 5960x which is a bargain right now, dual 1080Ti would outperform one 2080Ti by a nice score.

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post #23 of 29 (permalink) Old 02-26-2019, 06:19 AM
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post #24 of 29 (permalink) Old 02-26-2019, 10:53 PM
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Quote: Originally Posted by white owl View Post
Having full lanes open to the GPUs isn't likely to help when one card or the other is barely being used. For the lanes to help you'd need to be right at the edge of what x8 can do which is quite a lot.
There are two instances where PCIe 2x8 vs. PCIe 2x16 makes a significant difference in this SLI testing video when using two Titan X Maxwells and two 1080's on a overclocked 5930k in Witcher III: Wild Hunt and a gigantic difference in minimum FPS (40% to 60%) in Battlefield 1:

Someone else has found using a high bandwidth bridge actually made a difference w/SLI 980Ti's on at least one game.
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post #25 of 29 (permalink) Old 02-26-2019, 11:05 PM
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Quote: Originally Posted by VeritronX View Post
They say themselves this was an archival test performed before they changed to the i7 6950X (which launched before the HB Bridge) and the performance loss on their video is similar to the gain you get going to the HB bridge on a 2x8 system like the 6700K used in this test:

Spoiler!
That particular video showed one instance where the HB SLI bridge made a significant difference w/the 980Ti SLI setup.
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post #26 of 29 (permalink) Old 02-26-2019, 11:55 PM
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Its been proven in multiple tests that a pair of 2080ti's suffer considerably when running in x8 slots. Even with the NVLink bridge.

Moving on now....

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post #27 of 29 (permalink) Old 02-27-2019, 12:07 AM
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Quote: Originally Posted by The_Rocker View Post
Its been proven in multiple tests that a pair of 2080ti's suffer considerably when running in x8 slots. Even with the NVLink bridge.

Moving on now....

Topic is about every card suffering when used in x8 in SLI and why OP has performance like he has

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post #28 of 29 (permalink) Old 03-01-2019, 09:29 PM - Thread Starter
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Well the 2080 TI was only running at 8x speed. I was having problems with my PCI-E extension cable to where it was only doing half the speed, ordered a new one off amazon, installed it, and now I'm getting PCIE 3.0 @ 16x. Just did a Time Spy demo and got a slightly better score:

https://www.3dmark.com/3dm/34111037?

New score. The PCIE speed does affect the performance, but its honestly not as bad as some of you are making it out to be.

Also, the big problem with SLI is the games supported. I would have seen much better scores for some of these games if I had support from Nvidia, didn't have to hack the profiles, etc.,

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post #29 of 29 (permalink) Old 03-01-2019, 10:27 PM
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Quote: Originally Posted by JMCB View Post
Well the 2080 TI was only running at 8x speed. I was having problems with my PCI-E extension cable to where it was only doing half the speed, ordered a new one off amazon, installed it, and now I'm getting PCIE 3.0 @ 16x. Just did a Time Spy demo and got a slightly better score:

https://www.3dmark.com/3dm/34111037?

New score. The PCIE speed does affect the performance, but its honestly not as bad as some of you are making it out to be.

Also, the big problem with SLI is the games supported. I would have seen much better scores for some of these games if I had support from Nvidia, didn't have to hack the profiles, etc.,
The number of PCIe lanes does make a difference in SLI performance and that has been true all the way back to the Maxwell generation.
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