P3D v2.5 SLI test results, up 33%

[Guest]

I used EVGA Precision X16 to monitor GPU's and usage to make sure both were being loaded (at normal clocks loads were between 70-90% on both GPUs).

 

The test setup:

 

Orbx FTX Global

Orbx KSEZ

PILOT's FTX Mesh

Default F-22

REX Soft Clouds

Weather = Cold Fronts theme

 

SLI enabled:

 

 

SLI NOT enabled:

 

 

Graphics settings used:

 

 

 

 

 

 

flight and weather file are here: https://drive.google.com/file/d/0Bw0Q-fAfEZwyNmpQMGFwcUJJS3M/view?usp=sharing

 

Hardware/Software used:

i7 5960X @ 4.375 Gz

16GB DDR4 @ 3000Mhz

2X Samsung 850 1TBs SSD

2X Titan X 12GB

Win7 64bit

 

Cheers, Rob.

 

[hesynergy 67]

hmmmmmmm...that almost makes it worth buying another GTX 770… Thanks Rob I'll be looking forward to corroboration from here… And decide.

 

regards,

 

Chas

[boez 85]

Rob, I'm seeing a similar improvement with similar settings with my 2 980gtx setup. Pretty even gpu load 50/50% according to msi afterburner. Very happy. Only two issues, one is the lightning effect is corrupted (although I've read elsewhere that you don't experience that?). The other is after coming back out of in game menus sli mode is dropped - two quick 'alt-enters' solves that. In fact folk experiencing poor sli performance may want to give that a try as when it happens performance is worse (halved?) compared to non-sli operation.

 

Just to note that this was a totally fresh install of W8.1 + drivers + p3d and no cfg file tweaks or NI/NCP tweaks.

 

4790k @ 4.8

2 x 980gtx

Win8.1x64

4K @ 30hz

[pincopanco 5]

Rob,

 

the average has increased with the SLI, but it seems more homogeneous without SLI.

[gboz 157]

Be interesting to know what's happening at those single digit data points, in both cases.

 

gb.

[jcomm 5,885]

Solution for the rich guys only..... I struggled to buy my 650 Ti 1GB card... just imagine what it would be to buy two 780.... Really not for me :-(

[pincopanco 5]

Rob, you had written:

 

"LM have been working with nVidia to make SLI work ... it's a back and forth dialog. Beau has made adjustments to code in order to meet nVidia's needs to make SLi a reality at the driver level. This dialog has been going on for a long time, but we should finally see the results soon."

Cheers, Rob.

 

Where is the fix of LM for adjustement of code?

[WebMaximus 372]

I used EVGA Precision X16 to monitor GPU's and usage to make sure both were being loaded (at normal clocks loads were between 70-90% on both GPUs).

Thanks for sharing Rob!

 

Have you tried enabling SGSS yet to see how that's handled in SLI?

[Mickeyj 35]

Thanks Rob for the test and for sharing your vid on youtube. Gonna try SLI with my 980s tomorrow.

[Kuragiman 227]

Rob,

 

I am actually more interested in how your sim doesn't melt down with all those settings blasting away on your VAS.   XD   Is that just your test settings or that how you fly?   Surely those heavy settings is giving to troubles in major aircraft like PMDG?

 

On the topic here;  guess I'll get that second GTX 980 ordered.

[alulekk 3]

@Rob:

 

Can I ask (or can you link me to a place) what you were able to "change" with SLI from your normal Titan X config?

 

i.e.  what were you able to ratchet up?

 

Perhaps you have a link to your normal Titan X settings and I'll poke around on my own?

 

Cheers

 

P.S.  I'm also having the very odd lighting flashes some are seeing at times

[corkyo4 2]

I might be missing something here. Has there been an update released for SLI or are we still awaiting it in the next few weeks?

 

Just seems like a lot of sli chatter in the past 24hours but I can't find any update on the p3d official forum

 

Tom

[alulekk 3]

I might be missing something here. Has there been an update released for SLI or are we still awaiting it in the next few weeks?

 

Just seems like a lot of sli chatter in the past 24hours but I can't find any update on the p3d official forum

 

Tom

 

The new drivers seem to officially support SLI - But the jury is out yet on whether a future P3D update will further optimize for SLI (one would imagine there is plenty of room to improve on P3D side)

[vgbaron 3,486]

The new drivers seem to officially support SLI - But the jury is out yet on whether a future P3D update will further optimize for SLI (one would imagine there is plenty of room to improve on P3D side)

P3D itself is a work in progress - I would EXPECT that further refining of the SLI settings will occur.

 

Vic

[jabloomf1230 2,445]

P3d 2.5 is the version that Rob used to test SLI. The only thing new is the P3d profile in the the most recent nVidia display driver 352.86.

 

Given that P3D is still fairly CPU intensive, the improvement in frame rates is substantial. Is it worth the extra money though? 33% scaling is a bit low for doubling the cost of your GPUs. 60 to 70% scaling is typical for most recent 3D apps:

http://www.ocaholic.ch/modules/smartsection/item.php?page=20&itemid=1523