P3D with GTX980 2-way SLI

[vgbaron 3,616]

Not being a smartass, but have you tried a different monitoring program? MSI Afterburner or EVGA PrecisionX and see if the results are the same?

 

Do you have the GPU count set to TWO in NVidia inspector?

 

Vic

[SirStiggie 63]

Not being a smartass, but have you tried a different monitoring program? MSI Afterburner or EVGA PrecisionX and see if the results are the same?

 

Do you have the GPU count set to TWO in NVidia inspector?

 

Vic

 

Yes, Precision X and Yes, set to SLI_GPU_COUNT_TWO

[gboz 157]

 

 

Right, so second 980 was installed and tested with multiple games and bench-marking applications ( Unigine Valley and 3D Mark Firestrike) to confirm the SLI is correctly configured and is stable.

 

Ignoring the switching aircraft problem for the moment can you see any improvement in P3D with SLI verses one card?

 

gb.

[SirStiggie 63]

Ignoring the switching aircraft problem for the moment can you see any improvement in P3D with SLI verses one card?

 

gb.

 

After figuring out how to load P3D and have both cards active, my total increase in FPS was exactly....zero.

 

What I did get is no real loss of FPS and the smoothness and performance remained pretty stable in conditions with heavy clouds and scenery texture loads would have a negative effect on my single card.

 

At this stage in my little journey, this is not a solution I would recommend unless you're going SLI for other reasons, which I am.

 

I did notice that overclocking the cards did help a little with FPS but again, nothing to write home about.

 

I am also not using the latest drivers (I am at 347.88) as I don't want to lose my runway lights so I could be losing out there.

 

Its interesting to note that opening any menu option in P3D also breaks SLI and reverts to using the primary card. I figure I must be missing a setting somewhere but I'll be damned if I can find it or figure out what causes this.

[asanal 32]

Vic,

 

 

Thanks for your info. SLI finally enabled but I didn't see any performance changes. I came to conclusion, we will not get any joy from P3D until they change the code to 64 bit from 32.

 

I remember once I was speaking an expert regarding PC software. He told me don't invest any more money to P3D, their code base from FSX is old, will not match 64Bit, therefore you will loose half of your performance and cannot be gain until P3D recoded 64bit. 

[asanal 32]

How can I close  SLI green bar from screen during flight?

 

Thanks