Because Bykski makes a very large variety of blocks for lower and midrange cards, many of these have variant models. Several manufacturers adjust the circuit board designs of certain cards mid-generation. Some will indicate what what board it is by a Revision number on the box (like Gigabyte), others will print the board version on the board (Like MSI, see picture below for example). The board design is key to the fit for a block, and photos of the board are required for a guarantee of fit. Please also keep the width of your case in mind, as the fitting terminal will widen your card somewhat.