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We have been building AutoCAD boxes for almost 30 years. In those early DOS AutoCAD on Windows W4WGs boxes days, what we found had the biggest impact was using a custom boot menu w/ different config.sys / autoexec.bat files for CAD (w/ Hurricane Software memory expansion utility), and others for general Windows usage and Gaming. Fast storage was also important ... today not really a significant factor in everyday 2D / 3D AutoCAD
While more cores and Quadro / Fire GL cards are well suited and worth the much larger investment for rendering, folks in the pandemic era working from home are oft realizing their home gaming boxes are often faster, it's not generally the CPU that is responsible. I'm just shake my head when I go into a large engineering / architectural office and talk to CAD operators, they have dozens of Dell PCs with lotsa cores and Quadros / Fire GLs that are ill suited to AutoCAD 2D / 3D drafting considering the huge price premium. These boxes are purchased in bulk by the finance department who request proposals from salesman who have a vested interest in selling more expensive componentry. It doesn't help that Autodesk only certifies workstation cards. But AutoCAD is essentially a single threaded application, with only minor tasks offloaded. Run AutoCAD benchmark on Intel i7 or even an i5 and it consistently beats AMD CPUs with many more cores. Same with a Nvidia ... the GTX / RTX cards have always been a better value than Quadro / Fire GL. Not saying that the most expensive Quadro won't beat the most expensive GTX / RTX .. Im saying the professional card might beat the 50% as expensive gaming card by 1% if that. Here's an old test from 2012:
https://www.tomshardware.com/reviews/best-workstation-graphics-card,3493-4.html
I have not seen anything since which showed anything different. Of course when we talk Solid Works, thats the purview of the pro cards. We have had folks ask for Titans when the primary usage was 2D / 3D cad with occasional rendering needs. Not enough experience to form a hard opinion but the users reported that the cards performed better than they had hoped.