So just for reference re: changes to the recommended min specs for PL3 vs PL4
PL3
Windows System requirements
• Intel Core® 2 Duo, AMD Athlon™ 64 X2 or higher (Intel Core® i5 or higher recommended)
• 4 GB of RAM (8 GB recommended)
• 4 GB available disk space
• Microsoft® Windows® 8.1 (64-bit), or Microsoft® Windows® 10 version 1607 or higher (64-bit, and still supported by Microsoft). For more information:
https://support.dxo.com/hc/en-us/articles/360015926471
• DirectX 9.0c system-compatible
• OpenCl 1.2-compatible graphics card with 1GB of video memory
PL4
Windows System requirements
• Intel® Core™ 2 or AMD Athlon™ 64 X2 or higher (Intel® Core™ i7 4th generation or better, or AMD Ryzen™ recommended)
• 8 GB of RAM (16 GB or more recommended)
• 4 GB or more of available hard-disk space
• Microsoft® Windows® 8.1 (64-bit), or Microsoft® Windows® 10 version 1809 or higher (64-bit, and still supported by Microsoft®), Windows® 10 version 2004 or later recommended
• DirectX® 10-capable system
• OpenCL™ 1.2-capable graphic card with 1GB of video memory to handle OpenCL™ acceleration
• NVIDIA GTX™ 1060, AMD Radeon™ RX 580 or better recommended for DeepPRIME
PS my i5 system with its nVidia GTX 1050Ti has been fine with PL3 and Topaz products........................so if/when I upgrade I hope there will be life in the old dog yet to run PL4 with its DeepPrime