cyberfun3, a few items to think about prior to throwing that $100+ at a RX 560 purchase based on experience of having the cards. Yes, any GPU "works" with PD but the details of what features of the GPU are really supported is difficult to find, I've highlighted a few unique items.
PD16 v2524 and AMD RX 560 with Adrenalin 18.3.4 drivers
a) Only progressive formats supported for H.264 in the Produce module
b) H.265 hardware encoding is broken, you don’t get the bitrates you expect, quality issues, decode issues…. Initially exposed here over a year ago and still not fully functional:
https://forum.cyberlink.com/forum/posts/list/15/50731.page#post_box_267005
c) Some decoding anomalies for some formats and also timeline decoding (playback)
d) You can use hardware encoding in the Create Disc module for BD formats but only progressive profiles
e) RX560 for H.264 encoding is significantly slower (1.5-4x) for most standard Produce profiles (1920, 3840, 4K), equal on a few, vs a GTX1070. A brief comparison of 960/970 and 1070 was shown here:
https://forum.cyberlink.com/forum/posts/list/48751.page#post_box_255376
PD16 v2524 and Nvidia GTX1070 with 388.71 drivers
a) Same H.264 progressive formats supported as AMD but also 1920 x 1080 interlaced supported in the Produce module
b) H.265 hardware encoding functional and significantly faster than a high-end CPU encoding
c) Some decoding anomalies for some formats and also timeline decoding (playback) but overall rather functional
d) You cannot use hardware encoding in Create Disk module for BD formats (interlaced or progressive) as CL deactivated it in a PD15 patch and has yet to fix the issue in PD15 and/or PD16.
https://forum.cyberlink.com/forum/posts/list/50742.page#post_box_267502
e) H.264 NVENC encoding on GTX960/970 and/or 1070 significantly faster than VCE on RX560 with PD16
If you want a direct comparison of some particular Produce format and a timeline of yours feel free to PM me a PD pack project you’ve shared someplace.
Jeff