Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/11 22:53:42
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No problem. Hope you get it working. 
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hallowen
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/12 10:48:03
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ASUS: Rampage VI Extreme | i9-7940X | 2X RTX 2080 Ti Kingpin SLI | 32GB DDR4 3200MHz Memory - SAGER: NP9870-G | i7-6700K | GTX 980M 8GB | 64GB DDR4 | 950 PRO M.2 512GB | 17.3 QHD 120Hz Matte G-Sync | Prema bios - EVOC Premamod: P870TM1 | i9-9900K-LM | RTX 2080N 8GB | Modded Vapor Chamber | 32GB 3000MHz Ripjaws | 960 EVO M.2 1TB | 17.3 3K QHD 120Hz Matte G-Sync | Intel 8265 -
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Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/12 10:51:50
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hallowen
Well, Looks like there is now another #1 HOF RTX 2080 Ti 4-Way SLI Time Spy Extreme Graphics Top Score.
https://www.3dmark.com/spy/7457811
Yep, it was mentioned earlier in the thread.
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hallowen
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/12 11:05:01
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OK, Guess I didn't catch it before. Old age memory loss can be a pain sometimes... 
ASUS: Rampage VI Extreme | i9-7940X | 2X RTX 2080 Ti Kingpin SLI | 32GB DDR4 3200MHz Memory - SAGER: NP9870-G | i7-6700K | GTX 980M 8GB | 64GB DDR4 | 950 PRO M.2 512GB | 17.3 QHD 120Hz Matte G-Sync | Prema bios - EVOC Premamod: P870TM1 | i9-9900K-LM | RTX 2080N 8GB | Modded Vapor Chamber | 32GB 3000MHz Ripjaws | 960 EVO M.2 1TB | 17.3 3K QHD 120Hz Matte G-Sync | Intel 8265 -
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bcavnaugh
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/12 11:13:12
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 05:23:54
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Anybody have this working on an EVGA X299 Dark? It "works" and allows me to enable SLI but when I run 3dMark it kicks a white screen and crashes the system hard. It recognizes all the GPUs (8x,8x,16x,8x) but the first GPU on the bus appears as card number 2...not sure if that is related. Furmark seems to run fine with all GPUs at full load.
-Charles
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 05:36:55
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And by the way, huge shout out to Sajin, bcavnaugh and the group on techpowerup!
-Charles
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Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 14:36:12
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karrickca
Anybody have this working on an EVGA X299 Dark? It "works" and allows me to enable SLI but when I run 3dMark it kicks a white screen and crashes the system hard. It recognizes all the GPUs (8x,8x,16x,8x) but the first GPU on the bus appears as card number 2...not sure if that is related. Furmark seems to run fine with all GPUs at full load.
-Charles
TiN_EE had the same issue on the x299 dark. Never got it working either.
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Delirious
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 14:43:21
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how did I miss this thread. Congrats! Yeah, late to the party. I know. 
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bcavnaugh
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 14:45:05
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Delirious
how did I miss this thread. Congrats! Yeah, late to the party. I know.
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 17:11:21
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Thanks for the feedback. I reached out to TiN earlier today and he confirmed the same results. I'm not entirely certain this matters but with four GPUs on the board, the first one on the PCIe bus (the one the BIOS video is accessible on) shows up as GPU #2 in the Nvidia control panel. Fire Strike seems to run fine as well as other DX11 programs but DX12 programs simply freeze with a white screen and a hard system crash. This configuration works on my ASUS board (Z390 with 9900k @ 5.3GHz) that utilizes some sort of a PCIe switch to present 8x to each card. I'm out on travel this week but have a new board on order that offers the same infrastructure for the X299 chipset...I will report back!
-Charles
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Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 17:37:27
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I believe that has been a bug for awhile now. Pretty sure that isn't the cause of the issue.
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 17:47:07
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Good to know! I tried throwing in a PCIe 4x card into the mix to make all all slots clock down to 8x but no change in the outcome of the benchmark. Does anybody know how to get diagnostic data from the driver? It doesn't dump anything useful to the typical Windows event log that I've seen.
-Charles
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Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/13 17:50:12
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Cool GTX
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 06:19:46
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@ karrickca
will it work with only 3 cards ?
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 06:26:03
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I haven't tried it with 3 however I don't see any reason why it wouldn't. Seems to me that the most important piece in the equation is the motherboard and PCIe configuration. I have an EK 4-way distribution terminal connecting my cards so I can't pop one out easily to test it. Give it a shot and let us know!
-Charles
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the_Scarlet_one
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 06:41:07
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karrickca, what motherboard are you on?
Can you disable PCI lanes through dipswitches? I use to use my Rampage board dipswitches to install 4 cards with distroblocks, then test each card individually.
Of course, if you don’t have dipswitches, that is fairly hard to do lol.
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 06:54:04
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The board I'm currently using is the EVGA X299 Dark with a 7980XE. The driver patch works however it won't run any DX12 based applications, it just hard freezes with a white screen when initializing the GPUs. I don't know if there are any jumpers for individual PCIe slots but it would be neat to know if 2 or 3 cards would work when 4 will not. I can tell you that all 4 GPUs work fine on my ASUS WS Z390 Pro with a 9900k. When I get back from this business trip I'm going to test out the ASUS X299 Sage/10G board. Both the ASUS boards have PLX switches that preset more lanes than are actually available to the CPU, not sure if this is part of the fix. I think EK has blanks for their terminals, I will look into that.
-Charles
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the_Scarlet_one
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 07:00:07
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https://www.evga.com/support/manuals/files/151-SX-E299.pdf
Scroll to page 14 & 15. #30 is your PCI dipswitches. Turn off all the lanes you want to, and test Card’s individually without ever removing them. Just plug the display cable into the card you want to be primary.
It may require reinstalling the drivers occasionally, but you can test everything without removing anything.
You can also individually test each and every card, and see which one produces the best scores.
This will also remove heat from the loop as you disable cards, because they won’t be generating any extra heat to dissipate.
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 07:07:33
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Nice! I'll give that a try. As long as I disable SLI before changing anything it should be pretty straightforward.
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the_Scarlet_one
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 07:08:59
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Yep. I rarely had to redo my drivers, but occasionally it would help.
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 07:29:42
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Disabling one GPU didn't make any difference, still crashes hard on initializing. It does seem to allow 3 way SLI with no complaints from the driver at least.
-Charles
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 07:43:44
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Interesting though, disabling two and Time Spy will run. Not exactly helpful but it runs.
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bcavnaugh
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 08:23:11
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karrickca
Interesting though, disabling two and Time Spy will run. Not exactly helpful but it runs.
Because Hardware 2-Way SLI is Real over Software SLI and is the Standard for the RTX Graphics Cards. Also UL could be tightening up the benchmarks. There is less than 10 out of 1000s than can even get this to even work and it only seems to work on One Benchmark and fails all others.
post edited by bcavnaugh - 2019/07/14 08:28:15
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karrickca
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/14 09:22:47
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Probably true. The only benchmark I recall that wouldn't run at all is Port Royal but that sort of makes sense with the RT cores. Luckily running these benchmarks really isn't the endgame for my workstation, OpenCL on Linux doesn't rely on SLI in any manner.
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Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/07/15 20:44:24
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Yeah, port royal wouldn't work for me either.
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breadleafdc
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/08/01 13:04:19
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Hi Sajin,
Super impressive score and that you got this working.
I would really appreciate it if you could share how you did this with me as I would love to have a go myself and see if I can get this working too. I have 4 RTX cards myself (in three different machines at the moment) Please PM me.
Thanks
Bread
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Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/08/01 13:20:48
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breadleafdc
Hi Sajin,
Super impressive score and that you got this working.
I would really appreciate it if you could share how you did this with me as I would love to have a go myself and see if I can get this working too. I have 4 RTX cards myself (in three different machines at the moment) Please PM me.
Thanks
Bread
PM'd.
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breadleafdc
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/08/01 13:30:55
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Wow - Thank you so much - appreciated
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Sajin
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Re: RTX 2080 Ti 4-way SLi set by yours truly. =)
2019/08/01 13:32:14
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