Your W520 probably has the Optimus feature of selectable graphics cards. You can use the motherboards Intel graphics when you want to conserve battery, and then switch to the discrete NVidia Quadro card when you want performance. Are you aware of that feature and if so are you confident that xactimate is working with the NVidia Quadro Discrete Graphics when it is running? It's possible that the drivers for the quadro aren't loaded properly, etc. Do you have a NVidia Control Panel in your task bar?
Lenovo's latest Mobile Workstation offerings include the P52s which might be a consideration for a new machine.
https://www3.lenovo.com/us/en/laptop.../p/22TP2WPP52S
They make both touch and non-touch versions of this device and generally you would want to pick one of their "topseller" configurations for best price/performance offerings...
20LB0010US
20LB0027US (touch)
20LB0026US
20LB0028US (touch)
would all probably rock and roll.
-John






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