PC for 3ds max Photometric Rendering

CGDirector.com Parts List: https://www.cgdirector.com/pc-builder/?=6O5Ia

CPU: AMD Ryzen 9 7950X 4.5GHz 16-Core Processor ($598.99)
CPU Cooler: be quiet! Dark Rock Pro 4 ($89.90)
Motherboard: Asus ProArt X670E-CREATOR WIFI ATX AM5 ($459.99)
GPU: Nvidia RTX 4090 24GB - ASUS TUF ($1891.13)
Memory: 64GB (2x32GB) G.Skill Trident Z5 DDR5-6000 CL30 ($209.99)
Storage PCIe-SSD: WD Black SN850X 4TB NVMe M.2 Solid State Drive ($309.98)
Power Supply: Corsair RMx Series RM1000x 1000W ATX Power Supply ($245.00)
Case: Fractal Design Define R5 Black ATX Mid Tower Case ($144.41)
Total: $3949.39

above was suggested for a budget of $4,000.00
Question - my previous PC CPU was AMD Ryzen 9 3950 X also with 16 Cores, however for large scale projects renderings were awfully slow and often crashing.
Since rendering will benefit from more core n threads, if it is the same for the one suggested above and what i have now in the current PC (ie 16 cores), will i still see a significant improvement in rendering times ?
Question - will Threadripper series be out of bound within the stipulated budget ?

Thanks for the anticipated advise.
/ MJ

The 7950X is about 40% faster in multi-core workloads than the 3950X. What kind of render engine are you using in 3dsmax? It might make sense to switch to a GPU render engine, which can be considerably faster, especially when you're adding a RTX 4090 to the build. Arnold GPU, Octane, Redshift, Vray-GPU come to mind.