Updated with solution.

Just for your info, RAM seems not to make a perceivable difference. 

The sim now occasionally takes slightly more than 16 GB but it still stutters a lot like before, regardless of the graphics settings. 

For example in the New York approach challenge with the 747 the average framerate is 25-30 fps (which is good for high settings) but randomly drops to 8-10 fps with 100% CPU spikes. The HDD light also flashes a lot (no background tasks interfering) despite the RAM upgrade.

If I switch from High to Medium settings, the average framerate is 35-40 but the random drops to 10 fps are still the same.

The sim is on a M2 SSD (Samsung 970 Evo), the rolling cache is 100 GB and I repeated the NY approach (as other situations to test) many times so it should not load data from the Internet. Rolling cache was the culprit, I disabled it and the stutters went away.

The config is the following, all other games run smooth and flawless:

• Intel i7 7700K
• 32 GB DDR4 3200 MHz CL16 (Corsair Vengeance RGB Pro)
• Geforce GTX 1080 Ti (Gigabyte Aorus)
• Samsung 970 Evo 1 TB SSD
• Internet: Fiber 50 MBit - 90 ms ping on the MS data server

I also rolled back to Geforce drivers 451.67, disabled all startup tasks and even Windows Defender with no avail.

Any suggestions?

Thanks a lot!

 

 

 

Edited August 20, 20205 yr by MrFuzzy
Updated with solution

Have you tried Hypertheading on?

Sure, I never disabled HT in my whole life 🙂 I can see 8 threads in MSI Afterburner and anyway I double checked when I entered the BIOS to adjust the XMP for the new RAM.

Thanks

i wonder if these spikes maybe come from mp on......i have that off, live weather on, live traffic off, no stutters.

and what resolution do yo run? that has an impact as well, me normal hd.

with yoru specs yu shoudl get smooth flying, but not maybe everywhere. NY area is a heavy area.

Some great tips for you to try 

https://forums.mudspike.com/t/performance-tips/10998

From what I've read, the random FPS drops are most likely the CPU processing scenery it has just received from the cloud, apparently manually caching the scenery or flying the area again (after it has cached it) really reduces this, obviously not an ideal situation but it might help point Asobo in the right direction to fix it.

Edited August 20, 20205 yr by ckyliu

Also resolution matters a lot. If you have a high resolution, turn render scaling to 70.

And turn HAGS on if you have the latest version of Windows

Edited August 20, 20205 yr by Slides

9 minutes ago, Slides said:

Also resolution matters a lot. If you have a high resolution, turn render scaling to 70.

And turn HAGS on if you have the latest version of Windows

What's hags

Just now, suchw said:

What's hags

Follow the link above. Hardware Scheduling option in Windows.

4 minutes ago, Slides said:

Follow the link above. Hardware Scheduling option in Windows.

Thanks

It's your VRAM on the GPU that is processing/pushing assets to the display. RAM can cache assets, ready to send to the GPU's VRAM (assuming the developer's have coded that into the engine) to save some time, but you'll still be bottlenecked by the VRAM, the bus speed between components, and the clock speeds.

I have to say the only time I really have any juddering etc is if there's another player near me.

Somewhere like London is fine until someone in an Ikon A5 flips 50 feet along the Thames below me!

10 minutes ago, Fizzelle said:

I have to say the only time I really have any juddering etc is if there's another player near me.

Somewhere like London is fine until someone in an Ikon A5 flips 50 feet along the Thames below me!

I turned off multiplayer (and AI traffic for over NYC), but I prefer a smooth solo experience than sharing a stuttering sky.

I did consider upgrading from 16GB RAM because of crashing, but instead I disabled Windows auto-virtual memory allocation and assigned 16GB of virtual memory on my C drive and the game SSD, and this has fixed crashing (I virtually have 32GB of system RAM now). It won't affect graphical performance, but I appear to be doing alright with 8GB VRAM on my GTX 1070.

It depends on the aeroplane you're flying, too. In a Cessna 152 it's silky smooth on ultra settings, 1080p, locked 30FPS. In a Cessna 172 (with digital cockpit displays putting pressure on the hardware) I get some stuttering near the Manhattan skyscrapers - but only really when I'm moving the camera around. I don't notice just looking out from the cockpit.

Edited August 20, 20205 yr by March Hare

Thank you for this report. I was about to upgrade too, but I might wait a bit. 

Noticed bit a jerk in pre-release video of landing at JFK.  On short final all the Manhattan high rise suddenly is rendered in the background and not surprisingly there is some shudder.  Not surprising in V1 when FSX and P3D have been struggling for years with auto-gen popping, draw distances etc.