With the configurator, you just select what you want to cool on the right hand section and use the drop down boxes.
When you reach the list of say GPU's, some are similar so you may have to go by the actual part number.
When you select your GPU, you will get a list of available blocks and backplates.
Had a look for the 970. There is only a small universal block that covers the core chip only, you will still need to cool the memory somehow.