the r4 is the bottom of the barrel not the top of the line, cards like the cyclo ds evolution have better compatability and a featurelist that makes the r4 look like an old slot 2 device, whats worse is the modern low end cards like the toptoy and edge card already do everything the r4 v3 does at a lower cost if you want an r4 like featureless card.

avoid like the plague and buy a modern card or a premium one instead.