this is the zotac card https://jet.com/product/ZOTAC-GeForce-GTX-1050-Mini/a494c0cb484c4d7bb48048534b98fa55 i want to know if it will work with a dell optiplex 755 Desktop size (2nd biggest optiplex 755) www.google.com/search
The answer is NO because its too big and uses too much power.
The DT is limited to 25W and this is a 75W card. If you remove everything and use an external power supply which is not really an option then it might work.
I am running Zotac GTX 1050Ti mini in my DT O755 with PCI/PCIe riser and it is working just fine - but I had to remove the plastic on the graphics card which doesn't do much anyway. But yes, I can feel that I am pushing the PSU to its limit with the Wifi card occationally not working. I remember it's that Wikipedia said that there is BIOS update that enables 75W consumption mode on major PCIe 1.1 boards, as PCIe 1.1 is not designed to handle 75W.