a bit more to this story...
and OH DEAR !
well, for those who watched my video posted 1 or 2 pages before, i thought i really have a prob on the main screen...
and than : remember few ago when we've checked the BIOS (to only tweaks few things finally without importance), my son said : strange, there's no FAN in the monitoring (was at 0 RPM), and the CELERON is at 70° C idle... may be the monitoring is faulty !?... and we didnt go further that day
today, my son really wanted to test the DUAL CHANNEL with 2 good CORSAIR RAM (2x2 Gigas)
and when we open the PC box, for the 1st time since we own the pin...
HALLELUJAH
things became clear : a cable was serting on a fan pall, blocking it to start moving !!! (btw, no bip error !!!???)
redoing a correct cable management, FAN go on his way, and the 70° C became 35° ... and this time monitoring was all "normal"
and than, in gameplay : all the animations on the main screen are now perfect, no more lag, no more stutter, nothing, even when i'm playing stacked multiballs and shooting all balls without craddling, playing multiple animations in the following
only the phone still show some minors latency (the badest ACID RAIN), but not as before
CONCLUSION :
PC power seems to be the key, that means all hardware parts you can tweak to better means the better the pin will play, while CPU is the main piece in this case...
but in my case, quite sure the CELERON was thermal throtling (luckily we never reached max temp/had a freeze)
i'm not saying you to check your PC box, quite sure it was just bad luck in my case, but...
now i'm really happy, i can deal on how my pin is playing now