Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
D2ultima

The SLI information guide

Recommended Posts

11 minutes ago, D2ultima said:

Well see, that's the OTHER issue. SFR can have a line depicting where one card is rendering and where the other is, and has something akin to screen tearing when something on one portion ends up on the other. And further to that, it requires even MORE bandwidth than AFR does.

I know. That's the reason why it was shelved. There was no reason for Nvidia to improve on SFR because AFR was superior in every way. But in recent times, there's a legitimate reason to start looking into SFR once again. It needs to be improved upon, not just performance and tearing, but compatibility as well. Even though we can switch to SFR, and force "SFR Friendly" bits with Inspector, it simply doesn't work in most games. If developers can lower the bandwidth and fix the tear down the middle of the screen, then SFR will be a good alternative to AFR in games that rely on previously drawn frame data. Having each GPU process one half of the frame makes sense on paper. It just needs to be properly implemented.


 

Gaming Rig
Spoiler

CPU: Intel i7-6850k @ 4.2GHz

GPU: 2x FE GTX 1080Ti

Memory: 16GB PNY Anarchy DDR4 3200MHz

Motherboard: ASRock X99 Extreme 4

 

Encoding Rig
Spoiler

CPU: Ryzen 7 1700 @ 3.7GHz

GPU: GTX 1050

Memory: 8GB Curcial Ballistix DDR4 2133MHz

Motherboard: Gigabyte AB350M-DS3H

 

Link to post
Share on other sites
Posted · Original PosterOP
6 hours ago, Frankenburger said:

I know. That's the reason why it was shelved. There was no reason for Nvidia to improve on SFR because AFR was superior in every way. But in recent times, there's a legitimate reason to start looking into SFR once again. It needs to be improved upon, not just performance and tearing, but compatibility as well. Even though we can switch to SFR, and force "SFR Friendly" bits with Inspector, it simply doesn't work in most games. If developers can lower the bandwidth and fix the tear down the middle of the screen, then SFR will be a good alternative to AFR in games that rely on previously drawn frame data. Having each GPU process one half of the frame makes sense on paper. It just needs to be properly implemented.

But you're asking for a paradox. You're saying that you want devs to lower bandwidth requirements to use SFR... but the problem with AFR IS heavy bandwidth requirements.

 

SFR is unnecessary if we have the bandwidth or AFR-friendly tech is used. SFR requires more bandwidth than AFR even if it works better with TAA or allows SMAA T2x. It's a lose-lose situation. What we need is devs to optimize, and not use AFR-unfriendly tech just because it's easier/cheaper to implement. I.E. make games for PC first then port to consoles. Why don't consoles get less optimization, running at sub-low specs for "1080p" and "4K", barely holding 30fps like the PC titles end up doing if someone used console specs to run the games? It makes no logical sense, it's all on devs to fix things.

 

That, or we get significantly more bandwidth available to us. If we could skip the extremely late PCI/e 4.0 spec and jump right into 5.0 spec, PCI/e 3.0 x16 will become PCI/e 5.0 x4, which means x8/x8 for SLI is more than enough, and a 4-lane width from chipsets to bridges will not be saturated by thunderbolt 3, or a single NVMe, or an eGPU, etc. Bandwidth is key right now, the tech in the last 3 years has exploded and the interfaces we have are either poorly designed (HB bridge, NVMe on M.2 NGFF interface, etc) or just have no bandwidth to keep up (4-lane bridge between chipset/CPU, no 10 gigabit ethernet readily available, no gigabit wifi available, etc). Optimization in games will help greatly, but the rest of the services we just need more bandwidth for.


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites
On 12/10/2017 at 12:53 PM, D2ultima said:

But you're asking for a paradox. You're saying that you want devs to lower bandwidth requirements to use SFR... but the problem with AFR IS heavy bandwidth requirements.

 

SFR is unnecessary if we have the bandwidth or AFR-friendly tech is used. SFR requires more bandwidth than AFR even if it works better with TAA or allows SMAA T2x. It's a lose-lose situation. What we need is devs to optimize, and not use AFR-unfriendly tech just because it's easier/cheaper to implement. I.E. make games for PC first then port to consoles. Why don't consoles get less optimization, running at sub-low specs for "1080p" and "4K", barely holding 30fps like the PC titles end up doing if someone used console specs to run the games? It makes no logical sense, it's all on devs to fix things.

 

That, or we get significantly more bandwidth available to us. If we could skip the extremely late PCI/e 4.0 spec and jump right into 5.0 spec, PCI/e 3.0 x16 will become PCI/e 5.0 x4, which means x8/x8 for SLI is more than enough, and a 4-lane width from chipsets to bridges will not be saturated by thunderbolt 3, or a single NVMe, or an eGPU, etc. Bandwidth is key right now, the tech in the last 3 years has exploded and the interfaces we have are either poorly designed (HB bridge, NVMe on M.2 NGFF interface, etc) or just have no bandwidth to keep up (4-lane bridge between chipset/CPU, no 10 gigabit ethernet readily available, no gigabit wifi available, etc). Optimization in games will help greatly, but the rest of the services we just need more bandwidth for.

4 years later you are still a legend for maKing this guide. Hope one day you can make a Crossfire Guide

Link to post
Share on other sites
Posted · Original PosterOP
9 minutes ago, DanielMDA said:

4 years later you are still a legend for maKing this guide. Hope one day you can make a Crossfire Guide

Well thanks. As for a crossfire guide... someone would need to send me a crossfire system. At the moment I'm stuck on a notebook and no AMD cards will slot in because they pretty much stopped making MXM (or any high end parts).

 

I don't mind doing the work, but I refuse to write about this kind of hardware unless I have 1st party access to it. People can tell me all day long they're getting this and that etc, but the minute I ask for proof they have 755000 reasons why going and getting proof is impossible. Then they get pissy if I call them out on it, saying I'm wrong, then when they find out I'm correct they want to drop the subject. So I won't work with others to test (plus I need to be able to see things in front of me on top of this).

 

Not begging or anything, but even if I could afford it right now, there's no point in me buying a full desktop with two AMD cards just to write a guide for it really xD.


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites
1 minute ago, NetworkErrors said:

So just purely theoreticly... could i use a evga 780 sc edition 3gb with an evga 780 ti sc edition with also 3gigs?

No. The model and VRAM amount have to match to use SLI. The only thing that can differ is the subvendor (EVGA, ASUS, MSI, Gigabyte, etc.)


The Desktops

Main Rig: CPU: AMD Ryzen 5 3600X | RAM: 16GB (2x8GB) Ripjaws V DDR4-3200 | Motherboard: ASUS ROG Crosshair VI Hero | Storage: 1TB Samsung 970 EVO Plus, 2x1TB HDD | GPU: GTX 1080 Strix O8G | Cooling: 2x240mm AIO + NZXT Kraken G12 | Case: Cooler Master NR600 | PSU: EVGA GS 550W

Secondary Rig: CPU: Intel Core i7-7700K | RAM: 16GB (2x8GB) DDR4-2400 | Motherboard: ASUS Z270E Strix | Storage: 256GB Crucial MX100 + 1.2TB Fusion ioDrive2 SSD (Windows) | Cooling: Cooler Master Hyper 212 Black (2x EK Vardar Furious 3000) | Case: Fractal Design Meshify C | PSU: Corsair CX550M

Hooptie: CPU: Intel Xeon E5645 | RAM: 12GB (3x4GB) DDR3-1600 | Motherboard: ASUS P6X58D-Premium | Storage: 240GB SanDisk SSD + 500GB HDD | GPU: GTX 970 Strix | Cooling: Reeven Ouranos | Case: NZXT Source 210 | PSU: Cooler Master Silent Pro M 720W

Oculus Rift CV1: 2x Sensors


The Portables

MacBook Pro (Early 2015, A1502) 13": CPU: Intel Core i5-5257U | RAM: 16GB DDR3-1867 | Storage: 256GB SM0256G SSD | GPU: Intel Iris 6100

Nintendo Switch (Gray, HAC-001) | iPhone XS Max 64GB (Space Grey) | Apple Watch Series 2 (42mm) | AirPods (2nd Generation)

Link to post
Share on other sites

So with my build (I use the Gigabyte 1080) and I got a second one, Would I be able to reduce my screen tearing in 4k and also have at least 60FPS? I keep seeing various understandings of what SLI will do and the various configs it can perform. So I am just trying to have a better grasp on this because while the answers from OP were beneficial I still feel I am lacking understanding of what it actually will do because there seems to be multiple profiles that can perform different things.

Link to post
Share on other sites
Posted · Original PosterOP
6 hours ago, Jv2391 said:

So with my build (I use the Gigabyte 1080) and I got a second one, Would I be able to reduce my screen tearing in 4k and also have at least 60FPS? I keep seeing various understandings of what SLI will do and the various configs it can perform. So I am just trying to have a better grasp on this because while the answers from OP were beneficial I still feel I am lacking understanding of what it actually will do because there seems to be multiple profiles that can perform different things.

SLI doesn't really have anything to do with screen tearing. If you want screen tearing to vanish, you can do one of three things:

 

- Use Vsync (heavy input lag, undesirable)

- Use windowed or borderless modes (not supported by all games well, often FAR more stuttery than fullscreen due to terrible coding glares at Black Ops 3 and adds input lag though not nearly as bad as vsync). Windowed/Borderless modes have an extreme tolerance to tearing. It is theoretically impossible to have tearing occur in Windows 8.1/10 because DWM is forced-enabled, but I've seen it happen enough times to know that theories aren't absolute.

- Acquire a gsync monitor and lock your FPS to 56 via a tool like RTSS with gsync enabled. While RTSS DOES add input lag, it will only add lag of 1 frame (negligible realistically) and without hitting the limit for vsync (60fps) you can enjoy Gsync's benefits (no tearing, super smooth) combined with perfect frame pacing unless a game is horribly coded and less input lag than borderless/windowed due to being fullscreen.

 

Profiles can force better scaling and other such things. For example, the Black Ops 3 profile is not good. It loses scaling at higher FPS if you have sufficient GPU and CPU power to push for say... 200 frames (the limit of the multiplayer). The Battleforge profile however fixes this greatly, and improves performance with no visual downsides whatsoever. In other words, it's a "free improvement". But it has nothing to do with frame pacing or tearing. It may have something to do with stuttering, however, which is another thing that the Black Ops 3 SLI profile fixes when changed. You can see someone posted about it here https://forums.geforce.com/default/topic/950887/sli/call-of-duty-black-ops-iii-sli-profile/ and I found out from other 980Ti SLI users later on that it did indeed help their scaling in SLI.


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites

I have a 7700K overclocked to 5 GHz and two GTX 1080s overclocked to 2101 MHz. I also have an Asus ROG Swift PG278Q G-Sync monitor.

I can confirm that microstutters aren't the thing of the past. I definitely still see microstutters in the games that I play. I must be very sensitive to microstutters and this just bothers me.

Link to post
Share on other sites
3 hours ago, AngeleJR said:

I have a 7700K overclocked to 5 GHz and two GTX 1080s overclocked to 2101 MHz. I also have an Asus ROG Swift PG278Q G-Sync monitor.

I can confirm that microstutters aren't the thing of the past. I definitely still see microstutters in the games that I play. I must be very sensitive to microstutters and this just bothers me.

What games?

 

Perhaps there are SLI bits you can switch to that'll help alleviate microstutter.


 

Gaming Rig
Spoiler

CPU: Intel i7-6850k @ 4.2GHz

GPU: 2x FE GTX 1080Ti

Memory: 16GB PNY Anarchy DDR4 3200MHz

Motherboard: ASRock X99 Extreme 4

 

Encoding Rig
Spoiler

CPU: Ryzen 7 1700 @ 3.7GHz

GPU: GTX 1050

Memory: 8GB Curcial Ballistix DDR4 2133MHz

Motherboard: Gigabyte AB350M-DS3H

 

Link to post
Share on other sites
Posted · Original PosterOP
18 hours ago, AngeleJR said:

I have a 7700K overclocked to 5 GHz and two GTX 1080s overclocked to 2101 MHz. I also have an Asus ROG Swift PG278Q G-Sync monitor.

I can confirm that microstutters aren't the thing of the past. I definitely still see microstutters in the games that I play. I must be very sensitive to microstutters and this just bothers me.

Sounds like your system setup, since our specs match and I don't get microstutters unless I'm in a window and media is playing on another screen?


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites

So I just started a topic and wish I had seen this one. But I have a sli setup of 1080tis and after doing some benchmarks the top GPU held a solid 79-81 c on rise of the tomb raider while the bottom was 60-65. Is that normal temps? Let me know what your guys think. I thought maybe their be a 5-8c difference. First time sli user here. 

Link to post
Share on other sites
Posted · Original PosterOP
3 hours ago, ekyona said:

So I just started a topic and wish I had seen this one. But I have a sli setup of 1080tis and after doing some benchmarks the top GPU held a solid 79-81 c on rise of the tomb raider while the bottom was 60-65. Is that normal temps? Let me know what your guys think. I thought maybe their be a 5-8c difference. First time sli user here. 

Normal because your bottom card is blocking your top one's airflow. This is why hybrid cards are useful, and why some people wish for blower cards. Alternately, using an extra motherboard spacing (like slots 1 and 3) and picking a motherboard that will allow multi-GPU in those slots is a decent idea.

 


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites

There is a one slot space between them both cards. And they are also open air cards. So I guess there is no way I can get it Cooler? Is 78-80c too hot for a GPU? 

Link to post
Share on other sites
Posted · Original PosterOP
14 hours ago, ekyona said:

There is a one slot space between them both cards. And they are also open air cards. So I guess there is no way I can get it Cooler? Is 78-80c too hot for a GPU? 

It's not too hot. You may be able to divert air flow to the top card using case fan placement, I don't know. I have never tried to adjust SLI airflow in a desktop setup, but thinking about it, it should be possible.

 

However with Pascal cards that's a significant performance dip compared to sub-60c. So good luck with it. Maybe you could run an AIO setup on the top card, would probably fix any issues (also why I recommend the Hybrid cards for SLI and top end pascal in general).


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites
5 hours ago, D2ultima said:

It's not too hot. You may be able to divert air flow to the top card using case fan placement, I don't know. I have never tried to adjust SLI airflow in a desktop setup, but thinking about it, it should be possible.

 

However with Pascal cards that's a significant performance dip compared to sub-60c. So good luck with it. Maybe you could run an AIO setup on the top card, would probably fix any issues (also why I recommend the Hybrid cards for SLI and top end pascal in general).

This has helped a lot!! Thank you so much. I kinda got a late start in sli but I want to learn more. I thought I was doing something wrong. With my temps being that hot. 

 

 I have my card cards running at 1950-2000 MHz. I haven’t tried over clocking them. 

 

Before sli I did try to OC my GPU but couldn’t get it stable. I was in 4k reso.  So I most likely was not doing something right. 

Link to post
Share on other sites
Posted · Original PosterOP
9 hours ago, ekyona said:

This has helped a lot!! Thank you so much. I kinda got a late start in sli but I want to learn more. I thought I was doing something wrong. With my temps being that hot. 

 

 I have my card cards running at 1950-2000 MHz. I haven’t tried over clocking them. 

 

Before sli I did try to OC my GPU but couldn’t get it stable. I was in 4k reso.  So I most likely was not doing something right. 

No, Pascal cards do not overclock well. I don't expect you to be very good at it as a beginner, if raising the sliders don't work I'd expect most people to give up. I recommend MSI Afterburner or NVIDIA Inspector for overclocking, over Precision X. But if you're in the high 1900MHz range already you should be fine.


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites

I have a gtx 780 ti and have never SLI'ed before I've asked at a couple of forums and generally had a look online and it seems like sli is kinda dying out or support for it is from game developers and NVIDA so i was wondering if you would recommend getting another 780 ti and SLIing them or just getting single 1080 ti?

Link to post
Share on other sites
Posted · Original PosterOP
15 hours ago, bob112 said:

I have a gtx 780 ti and have never SLI'ed before I've asked at a couple of forums and generally had a look online and it seems like sli is kinda dying out or support for it is from game developers and NVIDA so i was wondering if you would recommend getting another 780 ti and SLIing them or just getting single 1080 ti?

Neither. bite it until new cards come out, will be soon since OEMs are pretty much touting upcoming notebook cards, and desktop cards are always before that.

 

If 1180 is much better, great. Get one, or an 1170.

 

If it's nothing special, great. Get 1080Ti for cheap.


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites
On 7/10/2018 at 1:02 PM, bob112 said:

I have a gtx 780 ti and have never SLI'ed before I've asked at a couple of forums and generally had a look online and it seems like sli is kinda dying out or support for it is from game developers and NVIDA so i was wondering if you would recommend getting another 780 ti and SLIing them or just getting single 1080 ti?

SLI is far from dying. The notion that "SLI is dying" comes from people who doesn't understand how SLI works, and more importantly, people who don't even own a SLI system.

 

Regardless, buying a second 5 year old card this close to Volta's release is not a good idea IMHO, especially when you consider the 3GB framebuffer is probably going to hold you back in a few modern titles. It would be better to wait for Volta, or if you must upgrade, to get a high end Pascal card.


 

Gaming Rig
Spoiler

CPU: Intel i7-6850k @ 4.2GHz

GPU: 2x FE GTX 1080Ti

Memory: 16GB PNY Anarchy DDR4 3200MHz

Motherboard: ASRock X99 Extreme 4

 

Encoding Rig
Spoiler

CPU: Ryzen 7 1700 @ 3.7GHz

GPU: GTX 1050

Memory: 8GB Curcial Ballistix DDR4 2133MHz

Motherboard: Gigabyte AB350M-DS3H

 

Link to post
Share on other sites

Will a TX650M PSU handle 1070ti sli? xD Soz if it's a stupid question 


OHHH, SASUKE-KUN!!!!!!!!!!!!!!

Link to post
Share on other sites
Posted · Original PosterOP
57 minutes ago, szym3k said:

Will a TX650M PSU handle 1070ti sli? xD Soz if it's a stupid question 

Since 1070Ti cards are about 200W each, as long as your CPU doesn't cross ~150W and your system has some headroom you should be perfectly fine.

 

Won't recommend it for hard overclocking.


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites
18 hours ago, D2ultima said:

Since 1070Ti cards are about 200W each, as long as your CPU doesn't cross ~150W and your system has some headroom you should be perfectly fine.

 

Won't recommend it for hard overclocking.

So I used the Cooler Master calculator, to see what the power consumption was with my system and 1070ti SLI and it came to around 580 watts, would you say that it's still safe?


OHHH, SASUKE-KUN!!!!!!!!!!!!!!

Link to post
Share on other sites
Posted · Original PosterOP
5 hours ago, szym3k said:

So I used the Cooler Master calculator, to see what the power consumption was with my system and 1070ti SLI and it came to around 580 watts, would you say that it's still safe?

It's enough, it's a 650W PSU is it not?


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

Link to post
Share on other sites
12 hours ago, D2ultima said:

It's enough, it's a 650W PSU is it not?

Yeah, its a gold rated 650W from Corsair.


OHHH, SASUKE-KUN!!!!!!!!!!!!!!

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×