1 hour ago, Sesquashtoo said:

I believe it all boils down to how much Vid Ram you have on your card....XP10 and 11 actually uses each dram.  If your vid settings are high, you are constantly swapping out to the main system RAM which will produce pause micro stutters as your CPU keeps on top of the swap out.  This is in turns, or straight flight.

The bottom line, you can't escape from.  You need an 8 GB card as the minimum to enjoy at least 70 percent of the feature slider potential.  Even with a 6GB vid RAM card, you'll be banging the head boards....but truly, 6 GB IS the bare minimum for smooth animation with medium settings, across all sliders.

It is also important to note the amount of textures being loaded into the sim.  Last evening, I did a quick flight from KBOS to KJFK, both having very heavy scenery, due to using MisterX6's KBOS as well as Project KJFK.  Boston and New York are pretty heavy on their own, but in any case, I had a long pause somewhere just east of Long Island on descent and I thought XP was about to crash, but it came back alive.  Frames were low, as I expected for NYC, but in any case, my texture load was pretty high.  I have an 8gb card in my system, which is good, but I also have 32gb of system RAM and pushing it all to a 4k screen.  Texture load can always be checked, via the settings menu and it is still important to pay attention to that in XP.  

My 1080gtx has 8gb of ram but I take the point about pushing xp11 to its limit at 4k. Shame as the frame rates

are quite good. I haven't got xp11 on an SSD drive however, maybe thats something that maybe a factor.

 

Thanks for the advise.

5 hours ago, Sesquashtoo said:

The bottom line, you can't escape from.  You need an 8 GB card as the minimum to enjoy at least 70 percent of the feature slider potential.  Even with a 6GB vid RAM card, you'll be banging the head boards....but truly, 6 GB IS the bare minimum for smooth animation with medium settings, across all sliders.

That's not entirely true, because monitor resolution is a big factor.

I have just 4 GB VRAM on my GTX970 (actually more like 3.5 GB as usable VRAM).

I'm getting an average of 40 fps with XP11, with graphics set to High(HDR), world objects set to Maximum, reflections at minimum and no world object shadows, just plane shadows. I have zero stutters, and haven't had any during the entire Beta cycle. 

The difference is that I'm using a 1920x1200 monitor, where my GTX970 is pushing less than a third the number of pixels as a 4K monitor. Fewer pixels = less data to move through VRAM.

My system RAM is 32 GB, which may contribute something to reducing the chance of swapping, but I believe it's mostly that I'm using an appropriate monitor resolution for the video card.