I've a Volvo FH with 600hp and 6x4 chassis. I did try accelerating over 90 with both CC and manually. Neither worked.
Btw, I've found this beauty: https://www.msi.com/Desktop/Trident-3
Almost the size of a PS4 and according a lot of reviews it works like a charm.
It is expensive but if I get this, I can use it for both gaming and work.
And it should last at least 7-8 years for me.
I'll go for the GTX1060 version though. That is more than enough for the games I play, FS17 and ETS2.