Copiability

My Dell T5600 has one Intel® Xeon® processor E5-2600 family with up to eight cores ,32GB 1600MHz RAM, NVIDIA Quadro K4000, Dell PERC H710P PCIe hardware RAID card and 825-watt PSU WITH tow 6-pin power connector. if I have NVidia rtx A4500 at price 800$, is it good chance for upgrade my GPU or think for rtx a2000 or RTX A4000 OR rtx 4000. which is more compatible for these old devices, but it works in good condition?

@bradthetechnut​ I need upgrade GPU for applications like adobe video editing, but all mentioned GPU compatible with my DELL T5600? 

@bradthetechnut​ No my  PSU has tow 6-pin but I ask for which one more convenient to dell T5600 WORKSTASION RTX A2000, RTX 4000 OR RTX A4000? 

@mazzinia_​ Excuse me, can I ask please again if you help me finally which one more convenient to my dell T5600 previously mentioned RTX A2000, RTX 4000 OR RTX A4000? Thanks for your time and I found RTX A4500 at 800$ open box it is good chance?

@mazzinia_​ Thank you for the clear answer and sincere advice.

@mazzinia_​ Most of programs I common use Adobe Creative Cloud All Apps, my old GPU card k4000 was very limited with most adobe APP so you advise me with A2000 can master these APP with previously CPU mentioned?

@mazzinia_​ Thank you very much for your good knowledge and perfect answers.