AC: Stuttering reduction

What can a user do to reduce or eliminate stuttering even in practice runs where their are no other cars on the track?

With Lotus F1 on Monza track I sometimes get as many as 6 stutters per lap, sometimes its 0 which is great.


What is the key cause of stuttering when running AC local vs MP which involves network response time as well as AC MP implementation?

Background:

My system: CPU: Intel i7-4770K Haswell 3.5GHz (some small amount overclocking was installed from Main Performance)
Video: NVIDIA | EVGA GeForce GTX 780Ti to 3 ASUS VE278Q 27” monitors 85hz refresh


I use a SSD memory for the AC install (The SSD is my C: drive)
My cpu usage is about 26% when AC is running. Processor Affinity shows all checked (0 to 8), Priority=Normal,
window resource monitor shows the cpus are getting used and none are any where near 100%, more like 40-50% and there are graphics showing PARKED cpus.

I turned off the car interior controllable items: no wheel, no driver arms.
I set Frame Limit to match my monitor max at 85.
FRAPS shows FPS will dip to 67 in some corners.
I tried reducing smoke generation and mirror resolution, I turned blur off completely.
I have not turn off HDR yet.
I have not tried to us msconfig and kill all background processes. I typically have firefox running in the background
which is the larger memory user (then Spyhunter4, explorer, LCore, office.bin, Steam....)
I have not tried to ALT-TAB out of AC when I see stuttering to see what is running with the resource monitor.
After I ran the resource monitor and looked at the CPU tab and saw a number of PARKED cpus I downloaded and ran a disable parking utility (edits the registry). This seems to have helped. Any problem with doing this?

http://coderbag.com/Programming-C/CPU-core-parking-manager

http://www.coderbag.com/Programming-C/Disable-CPU-Core-Parking-Utility

AC settings: Fullscreen Rendering ON | Triple Screen ON (6065x1080) | Vsync - OFF | Frame Limit - 85 | Aniso x 8 | AA x 4 | FXAA x 3 | Shadows -Low | World Detail - Maximum | HDR Color Sat On @ 92%| Smoke Generation – Low||Smoke in Mirrors OFF| Motion Blur - OFF | Mirror Resolution High| CubeMaps at Low | Faces per Frame - 4
 
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Well, I did a 50+ lap stint at Imola today and only had 2 or 3 hickups during the whole time. The hickups came way later than 6 laps. i guess the first one around 20 laps. I have some apps, OVInfo and RSR timing, but turning them off made no difference for me
 
That's useless, yes a SSD drive is faster, but for a PC game it has to run smooth on a normal HDD too, most people don't have SSD's, so that's not the solution...
And who said it is the solution? What i am saying above is that my system disk is an SSD therefore i cant be sure if the problem lies in the speed of the hdd or the fact that it is or isnt a system disk.
Trying to help here, but since you are sure thats not the solution i will let you fix it.
 
My system disk is an SSD , therefore i dont know if being a faster drive makes the game run smoother...

Is it an external disk, this SSD?

If so, unless you are using it with an eSata interface, performance will not be what you are expecting (6 Gb/s compared to theoretical max of 5 Gbps of usb3 or 480 Mbps of usb2).

Also to keep in mind that, with SSD, frequent access to numerous smaller chunks of data has relevant impact on performance.
 

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