Good to know. I may go ahead and upgrade from my 680 Classified to a 780TI classified. I was actually thinking about buying another 680 if SLI was going to be available in the patch....

 

Why not wait for Maxwell? It's not that far away.

Thanks Arwen ... Wes seemed to indicate "on hold" not necessarily in another patch 2.2 ... at least I can't find any mention of it in 2.2 patch (but it seems the P3D forum search doesn't work).

 

Anyway, SLi is a nice to have, hopefully it happens sometime this year.

 

Cheers, Rob.

 

You're most welcome Rob.

 

I configured my new computer so that I could eventually add another GTX 780, so I'm also interested in SLI support for P3D2. But I'm going to wait for the next gen nVidia GPUs to be released, as that will likely result in a price drop for the 780's.

Keep in mind that SLI does provide some benefit to P3d2 (as it does for P3d 1.4 and FSX). It's just that benefits are not enough to outweigh the cost of buying a second video card. When I had two GTX 580s in SLI, I'd say that FSX ran about 25% faster than with a single card. There are threads on AVSim where people posted benchmarks with FSX running in SLI.

 

What LM has said is that the present P3d2 code is not optimized for SLI.

Me never have problem with P3D, I buy it and problem start, no more problem after refund.

 

I did buy it because peoples say of 2.0 was game changer, I remember big hype, same now, big hype, maybe this time is right, I am waiting to see how long hype will stay before problem start again.

 

I wait to buy again when P3D is ready on good PC and addon work.

 

Olga Vankranendonk.

Just a few more days until we discover which major (new) bug makes it unusable for another 2 months+ (probably more now that the refund period is well and truly over for 99% of p3d users) while they patch THAT.

I've been using since release day and yes there have been some issue but not anything that has made it unusable if you referring to the joystick issues that's because of windows 8 and not LM. Because plain and simple 8 is horrid and that's way I keep an extra copy of 7 to use on my next build

Keep in mind that SLI does provide some benefit to P3d2 (as it does for P3d 1.4 and FSX). It's just that benefits are not enough to outweigh the cost of buying a second video card. When I had two GTX 580s in SLI, I'd say that FSX ran about 25% faster than with a single card. There are threads on AVSim where people posted benchmarks with FSX running in SLI.

 

What LM has said is that the present P3d2 code is not optimized for SLI.

 

Unfortunately for me, and from what I've read a number of others, merely having SLI enabled will prevent P3D from displaying anything, or on the rare occasions I can coax it to display things, there's some horrendous display bugs (textures won't load, drawing the entirety of terrain or other things as that bluish gray color.)  I was really hoping for the patch to have SLI fixes for that stuff.  Maybe even if it doesn't have optimizations, it'll at least fix that stuff.  We'll see - I'm really hoping for tomorrow because if nothing else I'm really tired of OOMs constantly.

 

-stefan

You can force SLI in the driver using nVidia Inspector, but it doesn't offer any performance improvement at all. I haven't seen any display corruption when I've tried it. I'm not buying the FSX benches that claim SLI improvements. As a former graphics engine programmer, I'm quite sure FSX was locking the whole game thread while it waited for the framebuffer to present, which would mean in SLI it would run a frame, wait for card 1 to finish, then run another frame, then wait for card 2 to finish. Instead, for SLI, you need to structure your code so that you start running your next frame WHILE the first card is finishing so you can start uploading to the second card as soon as possible (ideally before the first card is even done rendering).

 

If I had to guess, they don't really have a way to not lock their main thread while they upload autogen instance data to the card, so they can't upload to the other card for AFR in the meantime. I'm not really sure. I haven't tried SFR, perhaps that's where the display corruption comes in.

Not all that much more than what it takes to run FSX, with the exception of having a solid DX11 GPU for all the new shiny stuff.

 

Beyond that, well, we're kind of all waiting on the patch itself to get a bottom line idea of what is absolutely needed. There is a chance that some of the perf improvements might actually ease the requirements a bit, on the CPU side at least.

Thank you.

 

Looks like most of you have some higher end stuff, compared to me anyways. Thats why i was asking. I can run FSX pretty decent but, not much autogen if any. But, I am very curious about P3D and what could mean to the flight simcommunity.

 

Im running,

 

Intel Core 2 Duo E8400 @ 3.0 mhz 1333 FSB

4 gig's DDR2

GTS-250 1 gig card.

windows 7 ultimate 64bit

 

Is that good enough?

 

Thanks,

 

Eddy

Prepar3D v.2.0 requires a DirectX 11 card, and I don't believe that your GTS-240 is a DX11 card.

I'm not buying the FSX benches that claim SLI improvements.

 

 

http://forum.avsim.net/topic/425075-sli-framerate-tests/?p=2840646

 

Have at it with the author. There are other threads just like this too, not only on AVSim but elsewhere.

 

But you could be correct, but it's hard for me to tell, since you don't have your system specs included in your profile. My experience is that almost every FSX tweak does very little for any system built within the last 3 years, except create more instability.

Good to know. I may go ahead and upgrade from my 680 Classified to a 780TI classified. I was actually thinking about buying another 680 if SLI was going to be available in the patch....

 

Good Grief!  as Charlie Brown would say.  With the $$$ being thrown at video cards and system upgrades one would think the money would be better spent IRW on flight lessons and rental hours!

 

 

Good Grief! as Charlie Brown would say. With the $$$ being thrown at video cards and system upgrades one would think the money would be better spent IRW on flight lessons and rental hours!

 

Over the years I have spent at least as much on FS and real flying and I have a license!

My current 780Ti wouldn't pay for much more than 4 Flight Hours on my local flight school. And this thing will run for over three years! So I don't think  it's a silly thing to invest in good hardware.

You make a good point... But the graphics card would still be needed either way lol! The good news is dx11 support makes for a real increase in performance, since the cpu is not wasting time on rendering. So, it's not a waste of money..... As it might be with FSX.

 

P. S.

Achieving 3 hours of real flight training = Weeeee!

 

Achieving 60fps with full auto-generated in basemnt = Wooooooaah!!

 

LOL

 

 

Good Grief! as Charlie Brown would say. With the $$$ being thrown at video cards and system upgrades one would think the money would be better spent IRW on flight lessons and rental hours!

Sent from my HTC One using Tapatalk

I'm just curious why your frame rates are so low.  I run P3D in with Nvidia Surround and get 50fps on most of my Carenado aircraft and at least 25fps on high end complicated aircraft.  That's with a lot of Orbx scenery, REX4, Opus, etc.  I run my setup with a lot of the settings cranked up.  Some of the settings have no impact on fps.  Some definitely do.

I am running a single GTX780 (have a GTX570 in SLI, but not really applying that to anything).  It will be interesting to see how the 2.1 patch affects things, including frame rates.  If you are running that resolution across multiple monitors, have you tried it in a "windowed" mode and stretched the window to fit your resolution.  I have found that in "windowed" mode versus "Full Screen" I get about a 30fps increase depending on what and where I am flying.

 

Even though version 2 offloaded a lot of the work to the GPU, the CPU type/speed and other factors seem to affect fps as well.  Until the app goes to 64bit, we're still stuck with a roughly 3.1GB window of usable system RAM to use.  The interesting thing about this hobby is just the sheer number of various systems everyone is using.  What works for one person's setup might not work on another person's machine.

 

Hope the new patch helps you out.  Have a great weekend!