As explained in Post 90, BufferPools could effectively reduce stutters on some systems. Actually I was quite happy with its value set to 4,000 for a long time, until recently I upgraded to my current hardware on which FSX seems no longer benefited from it.
My Prepar3D V2 platform, on the other hand, reacts drastically different under the new 3-monitor setup. Stutters are virtually removed when the PoolSize is set to 900,000,000 — CORRECT — a total of 60 times of the largest FSX PoolSize value (15 millions) suggested in Post 90.
With values greater than 900 millions or smaller than 600 millions, smoothness of the display starts deteriorating.
It’s so funny that the finding simply came from a blink of my crazy idea — instead of evaluating results via adding or subtracting a small amount one at a time from the 4,000 value I was using, I multiplied the largest suggested FSX PoolSize value ten times to see how it went. The result was surprisingly impressive.
After days of testing, here it shows my optimal PoolSize set for Prepar3D V2 for now. Also, I lock FPS at 35 and Texture_Bandwidth_Mult at 60. Unfortunately, this “crazy” rule doesn’t apply to FSX.
As always, your mileage may vary.