memebuster :
Gam3r01 :
Why do you want a DDR3 gpu? Theres no reason you need one.
dangus :
i would go so far as to say there isn't a good DDR3 GPU at all. theres no reason to set your bar so low. if you're spending 220 euros you should get something decent. not a GPU with DDR3...
My computer doesn't support gpus with gddr5 memory. I brought it to the local "pc doctor" because i couldn't install my gtx 960 (that i returned soon after) and he told me that. He tried ddr3 gpus with my pc and they worked, but the gddr5 ones didn't. (my computer is a pre-build hp pc) (it's not a psu problem btw)
Makes me question the local computer guy.
Motherboard should not care what the GPU is as long as it compatible with the PCI-E standard of the board.
Only exception I could think of is if your computer is an HP that had the white-list hardware bios (where it would not accept any hardware that was not in that programed list). In this instance it is not that your motherboard needs ddr3 graphics, its just that no ddr 4/5 GPUs are in that whitelist.
So please list system specs (full model numbers please, things like "500w psu" or "quad core cpu" do not help us at all)
If it is custom built please include motherboard model, if OEM tower (HP, Dell, etc) please list the model number of the tower.