how to find out what is the manufacturer of the ram for Sapphire rx480 GPU

Please is it web site where i can check by Manufacturer code to find out what ram have got the GPU ?
or list with Ram - Manufacturer code

i can see they're quite a few
21260-00-20G
11260-01-20G
11260-02-20G
11260-07-20G
11260-13-20G
11260-20-20G