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Helpful ReplyPointers for basically first time SLI user?

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scgt1
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2018/10/07 04:45:20 (permalink)
So I just added a second 1080 FTW which you can pretty much say I'm a first time user of SLI since the last time I ran dual cards was way back in the 9800 GTX error and I don't remember anything about it. I have SLI turned on in the Nvidia settings and it's on maximize 3d performance. I'm seeing one card jump to 1721 on the clock while the other card is staying at around 140 just sitting on desktop with XOC running. Should the cards be linked in XOC? Both cards now have the 3B bios. The addition was on some 17 bios which matched the stamp on the back of the pcb so the bios I guess was never touched on it.
 
Is there any other things I should set or look at since I'm way out of the SLI loop?

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ty_ger07
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Re: Pointers for basically first time SLI user? 2018/10/07 09:49:32 (permalink) ☄ Helpfulby scgt1 2018/10/08 03:58:20
Sitting on the desktop, it's normal for SLI not to be used. Open a SLI-supported game and play it in full-screen mode. Then, you should see both cards used.

If you don't want your one card needlessly idling at 1721 MHz on the desktop, change the NVIDIA Control Panel setting from "prefer maximum performance" to "adaptive" in the "global settings" tab, and reboot. You can save a substantial amount of power and produce less heat that way. Then, in the "program settings" tab, add each game as necessary and set them to "prefer maximum performance" per-game. That way you will idle properly on the desktop but still have full performance in each game.
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Re: Pointers for basically first time SLI user? 2018/10/07 13:10:51 (permalink) ☄ Helpfulby scgt1 2018/10/08 03:58:23
Make sure you use a high bandwidth sli bridge.


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Re: Pointers for basically first time SLI user? 2018/10/07 14:31:15 (permalink) ☄ Helpfulby scgt1 2018/10/08 03:58:28
The desktop isn't using both cards since it's the desktop. No need to waste energy on something so simple. For gaming it just takes a good SLI bridge and a game that supports it.
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Re: Pointers for basically first time SLI user? 2018/10/08 03:59:02 (permalink)
Sajin
Make sure you use a high bandwidth sli bridge.


Hoggle
The desktop isn't using both cards since it's the desktop. No need to waste energy on something so simple. For gaming it just takes a good SLI bridge and a game that supports it.


Came with the unobtainable 1 slot EVGA HB v2 SLI Bridge.



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Re: Pointers for basically first time SLI user? 2018/10/08 14:38:25 (permalink)
How about any overclocking tips? Linked cards in the upper right of XOC correct? What about linked/unlinked for the power and temp target which is just to the left of temp. I've been toying with running Timespy off and on all day and I was hitting higher scores out of the box with no settings changed then I am with very mild clocks. Seems to degrade in score after each run and they are never the same or really close to the previous run. Is this normal with Timespy? I think I ran a total of 8 tests in a row on stock settings and started nearly at 11,900 and it dropped all the way in the 11,200 something range by the last test.
 
I did just flash the newer secondary bios to the extra card and I have them both on the secondary bios for the 130% limit. SMH just ran a stock run at 130% +50 on the core after a fresh reboot and only hit 11,696. Timespy is all over the place with scores. Wow this is a first out of all the tests I've ran today. I dropped the power back to 100% and left teh core at +50 and I scored 11,697. Surprised it didn't do what it's been having a habbit of doing all day and drop 150+ points. Last time I even touched XOC was when I clocked my first 1080 back on 9-26-16 according to my results page. So I'm pretty rusty with with XOC.
 
OMG Maybe I'm not cut out to ever overclock again. Rebooted and ran stock and got 11,906. Tossed in 130% +50 on core ran again and 11,270. Back to default (so the third pass on a fresh restart with extra programs closed) and get 11,586.
post edited by scgt1 - 2018/10/08 15:17:56

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Re: Pointers for basically first time SLI user? 2018/10/08 15:48:12 (permalink) ☄ Helpfulby scgt1 2018/10/09 03:08:33
It would be best to unlink the cards that way you can find the max clocks for each card. Leave the power & temp target linked. 3dmark scores can vary as much as 3%. Since you're clearly going past that 3% range I would look at the individual scores (gpu & cpu scores) that make up the final score to see which one is changing the most.


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Re: Pointers for basically first time SLI user? 2018/10/08 15:54:24 (permalink) ☄ Helpfulby scgt1 2018/10/09 03:08:36
scgt1
How about any overclocking tips? Linked cards in the upper right of XOC correct? What about linked/unlinked for the power and temp target which is just to the left of temp. I've been toying with running Timespy off and on all day and I was hitting higher scores out of the box with no settings changed then I am with very mild clocks. Seems to degrade in score after each run and they are never the same or really close to the previous run. Is this normal with Timespy? I think I ran a total of 8 tests in a row on stock settings and started nearly at 11,900 and it dropped all the way in the 11,200 something range by the last test.
 
I did just flash the newer secondary bios to the extra card and I have them both on the secondary bios for the 130% limit. SMH just ran a stock run at 130% +50 on the core after a fresh reboot and only hit 11,696. Timespy is all over the place with scores. Wow this is a first out of all the tests I've ran today. I dropped the power back to 100% and left teh core at +50 and I scored 11,697. Surprised it didn't do what it's been having a habbit of doing all day and drop 150+ points. Last time I even touched XOC was when I clocked my first 1080 back on 9-26-16 according to my results page. So I'm pretty rusty with with XOC.
 
OMG Maybe I'm not cut out to ever overclock again. Rebooted and ran stock and got 11,906. Tossed in 130% +50 on core ran again and 11,270. Back to default (so the third pass on a fresh restart with extra programs closed) and get 11,586.




Temps. As soon as you hit ~40C you start dropping clocks. With another GPU dumping more watts into your case, the temps increase faster resulting in lower bench scores. Also, thermal soaking. As you run the benches your motherboard and everything else gets warmer in the case...also resulting in GPU temps increasing faster.  Former long time SLI user: airflow and temps are key to performance. Even more so with Pascal.

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Re: Pointers for basically first time SLI user? 2018/10/09 03:11:52 (permalink)
Sajin
It would be best to unlink the cards that way you can find the max clocks for each card. Leave the power & temp target linked. 3dmark scores can vary as much as 3%. Since you're clearly going past that 3% range I would look at the individual scores (gpu & cpu scores) that make up the final score to see which one is changing the most.


Ok I'll toy around with them being unlinked. That is when the chain looks broken correct. Or am I thinking about it backwards and I've only been overclocking one card this whole time? LOL Currently the chain is together on both settings. Also how do you know which card is which in XOC? I know what my original card is capable of at list running single.

HeavyHemi
Temps. As soon as you hit ~40C you start dropping clocks. With another GPU dumping more watts into your case, the temps increase faster resulting in lower bench scores. Also, thermal soaking. As you run the benches your motherboard and everything else gets warmer in the case...also resulting in GPU temps increasing faster.  Former long time SLI user: airflow and temps are key to performance. Even more so with Pascal.


They haven't gone above 53C (on water) with the ambient room temp 85-86F. Yea I know my fiance is disabled and has cold and heat sensitivity issues. There isn't a fan one that isn't on in the house. LOL We never break $190 on our electric bill here in DFW though. How many TX residents can say that during the summer. LOL

post edited by scgt1 - 2018/10/09 03:41:06

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Re: Pointers for basically first time SLI user? 2018/10/09 09:29:23 (permalink) ☄ Helpfulby scgt1 2018/10/11 05:15:58
scgt1
Ok I'll toy around with them being unlinked. That is when the chain looks broken correct. Or am I thinking about it backwards and I've only been overclocking one card this whole time? LOL Currently the chain is together on both settings. Also how do you know which card is which in XOC? I know what my original card is capable of at list running single.

Correct. GPU2 should be GPU1, and GPU1 should be GPU2.


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Re: Pointers for basically first time SLI user? 2018/10/11 05:18:35 (permalink)
Sajin
scgt1
Ok I'll toy around with them being unlinked. That is when the chain looks broken correct. Or am I thinking about it backwards and I've only been overclocking one card this whole time? LOL Currently the chain is together on both settings. Also how do you know which card is which in XOC? I know what my original card is capable of at list running single.

Correct. GPU2 should be GPU1, and GPU1 should be GPU2.


So they are listed backwards in XOC then? The actual top gpu is really the bottom in XOC and the second (actual bottom) is the top gpu in XOC? That doesn't make much sense for EVGA to reverse them in XOC. lol
 
I think they are actually listed as GPU 0 and GPU 1 by my computer. It's been a few days since I noticed some location naming like that though. I would have to fire it up again and double check.

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Re: Pointers for basically first time SLI user? 2018/10/11 08:48:21 (permalink)
scgt1
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Ok I'll toy around with them being unlinked. That is when the chain looks broken correct. Or am I thinking about it backwards and I've only been overclocking one card this whole time? LOL Currently the chain is together on both settings. Also how do you know which card is which in XOC? I know what my original card is capable of at list running single.

Correct. GPU2 should be GPU1, and GPU1 should be GPU2.


So they are listed backwards in XOC then? The actual top gpu is really the bottom in XOC and the second (actual bottom) is the top gpu in XOC? That doesn't make much sense for EVGA to reverse them in XOC. lol
 
I think they are actually listed as GPU 0 and GPU 1 by my computer. It's been a few days since I noticed some location naming like that though. I would have to fire it up again and double check.




How software enumerates the GPU's is not always the same as how the OS or motherboard enumerates them. It's been an issue forever. HWInfo thinks my 980Ti is GPU 0 even though it is the 1080 Ti installed in PCIe slot one and the 980 Ti is for PhysX.

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Re: Pointers for basically first time SLI user? 2018/10/11 09:15:35 (permalink)
Some new sli games to grab.. Shadow of the Tomb Raider, Call of Duty Black Ops IIII (comes out the 12th) and eventually Battlefield V Nov 11th I think.

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Re: Pointers for basically first time SLI user? 2018/10/11 11:44:44 (permalink)
HeavyHemi
scgt1
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scgt1
Ok I'll toy around with them being unlinked. That is when the chain looks broken correct. Or am I thinking about it backwards and I've only been overclocking one card this whole time? LOL Currently the chain is together on both settings. Also how do you know which card is which in XOC? I know what my original card is capable of at list running single.

Correct. GPU2 should be GPU1, and GPU1 should be GPU2.


So they are listed backwards in XOC then? The actual top gpu is really the bottom in XOC and the second (actual bottom) is the top gpu in XOC? That doesn't make much sense for EVGA to reverse them in XOC. lol
 
I think they are actually listed as GPU 0 and GPU 1 by my computer. It's been a few days since I noticed some location naming like that though. I would have to fire it up again and double check.




How software enumerates the GPU's is not always the same as how the OS or motherboard enumerates them. It's been an issue forever.


+1


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scgt1
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Re: Pointers for basically first time SLI user? 2018/10/12 06:58:39 (permalink)
Sajin
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scgt1
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scgt1
Ok I'll toy around with them being unlinked. That is when the chain looks broken correct. Or am I thinking about it backwards and I've only been overclocking one card this whole time? LOL Currently the chain is together on both settings. Also how do you know which card is which in XOC? I know what my original card is capable of at list running single.

Correct. GPU2 should be GPU1, and GPU1 should be GPU2.


So they are listed backwards in XOC then? The actual top gpu is really the bottom in XOC and the second (actual bottom) is the top gpu in XOC? That doesn't make much sense for EVGA to reverse them in XOC. lol
 
I think they are actually listed as GPU 0 and GPU 1 by my computer. It's been a few days since I noticed some location naming like that though. I would have to fire it up again and double check.




How software enumerates the GPU's is not always the same as how the OS or motherboard enumerates them. It's been an issue forever.


+1


So what your saying then is it's a crap shoot in XOC as to which card is my top and bottom card then. LOL Nice. Guess I'll just bench one at a time and see what each one does then instead of bumping my original directly to what it can top out at.
 

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HeavyHemi
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Re: Pointers for basically first time SLI user? 2018/10/12 10:27:54 (permalink)
scgt1
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scgt1
Sajin
scgt1
Ok I'll toy around with them being unlinked. That is when the chain looks broken correct. Or am I thinking about it backwards and I've only been overclocking one card this whole time? LOL Currently the chain is together on both settings. Also how do you know which card is which in XOC? I know what my original card is capable of at list running single.

Correct. GPU2 should be GPU1, and GPU1 should be GPU2.


So they are listed backwards in XOC then? The actual top gpu is really the bottom in XOC and the second (actual bottom) is the top gpu in XOC? That doesn't make much sense for EVGA to reverse them in XOC. lol
 
I think they are actually listed as GPU 0 and GPU 1 by my computer. It's been a few days since I noticed some location naming like that though. I would have to fire it up again and double check.




How software enumerates the GPU's is not always the same as how the OS or motherboard enumerates them. It's been an issue forever.


+1


So what your saying then is it's a crap shoot in XOC as to which card is my top and bottom card then. LOL Nice. Guess I'll just bench one at a time and see what each one does then instead of bumping my original directly to what it can top out at.
 




Not exactly. Generally speaking whatever a program enumerates the device as, doesn't change. Meaning If XOC sees your GPU's in reverse order, then it will always be that way in my experience. I've never seen it change. And to your second point, yes for SLI, you should always test the stability of each GPU individually prior to setting your clocks for running in SLI.

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Re: Pointers for basically first time SLI user? 2018/10/12 11:22:45 (permalink)
Yes put the best overclocker on top. That card will be pushed harder and get the most heat.. unless your water cooling which is usually a must with the heat..and if the cards are close together.

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