Ok, so, after posting at the end of this Topic: http://talk.appletalk.com.au/t/cosmics-macpro5-1/3792/13
I have decided to (actually started) upgrading my old 2010 Mac Pro.
I am keeping the original 6 core 3.33GHz processor because after a bit of research, moving to 12 cores will give little advantage in Photoshop for the cost. I have just received a Sapphire Nitro+ 4GB Radeon RX 570 which I got very cheap on eBay. I am sticking with the 32GB RAM at this stage. I have purchased a Samsung 500GB NVMe drive and adapter which I have already installed and it works great but won’t be bootable until I go to the next level of firmware (currently running High Sierra but will go to Mojave once I install the 570). I will be using an internal four drive RAID 0 for my files. This will be backed up to an eSATA RAID 1 enclosure. I will probably use an eSATA SSD drive for Photoshop scratch to start with.
So, my question for any of you knowledgable people who still frequent this forum is:
I have one PCIe slot left. Should I install one of these: https://eshop.macsales.com/item/Sonnet%20Technologies/USB34PME/
or one of these: https://eshop.macsales.com/item/Sonnet%20Technologies/USB3C2PME/
or indeed something else, for further expansion?
Thanks in advance for any comments or helpful suggestions…