Using Two gpu in laptop

[Orbf]

I have an old laptop still working properly but I need to increase its performance, Can I use GTX 970 egpu together with 970 mobile in laptop? (Explicit multi adapter or sli ).

[RONOTHAN##]

7 minutes ago, Orbf said:

I have an old laptop still working properly but I need to increase its performance, Can I use GTX 970 egpu together with 970 mobile in laptop? (Explicit multi adapter or sli ).

SLI requres two of the same GPU, so a 970 and a 970M wouldn't work. Even if it did, SLI is dead so you wouldn't get any benefit from it anyway. Just use the desktop 970 if you have the adapters to use it, it is a much better card than the 970M

[Orbf]

My point is can I make my laptop use both gpu?

Also I am interested in question, can anyone use two gpu same time in laptop other than GTX 970?

[RONOTHAN##]

1 minute ago, Orbf said:

My point is can I make my laptop use both gpu?

Also I am interested in question, can anyone use two gpu same time in laptop other than GTX 970?

In certain rendering circumstances maybe, but the workload needs to be specifically designed to take advantage of multiple GPUs of different models. You could also have each GPU dedicated to a different thing. 

 

But for gaming, nope. SLI is the way you use more than one GPU, and it's not compatible with what you're doing, and nothing supports it anymore. 

 

There are laptops that came with SLI GPus, but they're rare, had horrible battery life, and since nothing supports SLI anymore, practically pointless. 

[PwnyTheTiger]

His point is that SLI is dead, and doesn't provide any sort of benefit. Sure, you can install both cards and I suppose you could choose which one runs on certain apps but why? What exactly is your end-game here? You're going down a rabbit hole of wasting money IMO.

[Orbf]

5 minutes ago, RONOTHAN## said:

In certain rendering circumstances maybe, but the workload needs to be specifically designed to take advantage of multiple GPUs of different models. You could also have each GPU dedicated to a different thing. 

 

But for gaming, nope. SLI is the way you use more than one GPU, and it's not compatible with what you're doing, and nothing supports it anymore. 

 

There are laptops that came with SLI GPus, but they're rare, had horrible battery life, and since nothing supports SLI anymore, practically pointless. 

I got your point and My goal is trying to game on two gpu may increase laptop performance as some people do on pc.

[Orbf]

9 minutes ago, PwnyTheTiger said:

His point is that SLI is dead, and doesn't provide any sort of benefit. Sure, you can install both cards and I suppose you could choose which one runs on certain apps but why? What exactly is your end-game here? You're going down a rabbit hole of wasting money IMO.

Money is always the restrictions.

[PwnyTheTiger]

5 minutes ago, Orbf said:

I got your point and My goal is trying to game on two gpu may increase laptop performance as some people do on pc.

Gotcha, unfortunately in this situation you'd be hurting yourself more than helping by attempting to do this. However, getting your hands on maybe a 10 series card would see some increase in performance if you were to use it in a EGPU unit. But then you also have to factor in the CPU you're on potentially bottlenecking a newer card, hence why I mentioned a 10 series card instead of a 20 or 30. But even then, there's no guarantee you wouldn't be bottlenecked somehow by even a 10 series card, and the performance gains would be potentially negligible at best.

[Eigenvektor]

11 minutes ago, Orbf said:

I got your point and My goal is trying to game on two gpu may increase laptop performance as some people do on pc.

As @RONOTHAN## said, you need two identical GPUs for that. Same amount of VRAM, same bus width etc. This is not typically the case between mobile and desktop parts.

 

Even if the GPUs could run in SLI, there are very few games that still support it. So even on desktops, using multiple GPUs for gaming is essentially dead (and has been for some time).