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Triple ASUS GTX Turbo 1080-8GB in SLI Grinds to a halt under SETI@HOME
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PaulLHamilton Send message Joined: 6 Nov 01 Posts: 4 Credit: 48,016,580 RAC: 4 |
Hi There, I have a Rampage IV Extreme Black Edition with 32GB Ram and 3 x ASUS 1080s in SLI. When I run it without running SETI@HOME, it will run forever with no issues. play what ever you want do what ever you want and it just hangs in there fine. When I run with latest SETI@HOME, at say 50% CPUs and 50% usage, after a couple of hours it grinds to a halt and my screen stops refreshing, mouse gets stuck for periods of 10-20 seconds then eventually it all just stops. Am currently doing some experiments to see if I can identify more behaviour. Is anyone else seeing this sort of issue? Is anyone else running triple SLI successfully? cheers Paul Paul Hamilton Primary PC
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rob smith Send message Joined: 7 Mar 03 Posts: 22188 Credit: 416,307,556 RAC: 380 |
SETI@Home does not require SLI, indeed, there are many, many occasions where using SLI has had a significant adverse impact on the performance of SETI@Home. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
PaulLHamilton Send message Joined: 6 Nov 01 Posts: 4 Credit: 48,016,580 RAC: 4 |
Is anyone running multiple 1080s and if so what configuration / nvidia driver are you using? cheers Paul |
rob smith Send message Joined: 7 Mar 03 Posts: 22188 Credit: 416,307,556 RAC: 380 |
Yes, triple, no SLI. Running under Linux, but the same system was running under Windows until I got bored with the perpetual forced updates messing things up (a real pain on a machine that rarely sees a monitor) Indeed the top three computers are all multi GTX1080. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
PaulLHamilton Send message Joined: 6 Nov 01 Posts: 4 Credit: 48,016,580 RAC: 4 |
Thanks Bob. Paul Hamilton Primary PC
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Scott R. Scribner, PhD Send message Joined: 18 May 99 Posts: 3 Credit: 23,672,314 RAC: 38 |
So are you saying to stick the extra card(s) in but not connect them? I got an SLI motherboard expecting that SLI is required to use multiple cards. No? |
rob smith Send message Joined: 7 Mar 03 Posts: 22188 Credit: 416,307,556 RAC: 380 |
Just put the additional GPUs in, and DO NOT connect them. Your motherboard does not "require" your cards to be linked, it is either the operating system or the programs you are running that makes this requirement. All four of my motherboards are "SLI" motherboards, all four have more than one GPU installed, and I do not use SLI. SLI is a technology to synchronise multiple GPUs for the purposes of improving the frame-rate/resolution characteristics. When used for computation this synchronisation causes a significant reduction in the performance of the GPUs, thus is best turned off, or not enabled. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Karl Roos Send message Joined: 19 Mar 01 Posts: 36 Credit: 206,258,788 RAC: 0 |
What are the adverse affects on S@H GPU computation from SLI? |
rob smith Send message Joined: 7 Mar 03 Posts: 22188 Credit: 416,307,556 RAC: 380 |
Massive reduction in performance - see my earlier post: https://setiathome.berkeley.edu/forum_thread.php?id=81721&postid=1879030 Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
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