@redrumloa

Its been down to what cards dealers can get new in lots of 5 or so and upwards.
I don't think that any R9 card configurations were the basic offering but an extra .
R7-250X's may have been the top basic option.
There has also not been any 3D benchmarks to see which card give a decent level of performance.

Based on current Radeon SI cards that are available new in quantities you have following models for example

Decent Performance
X5000/20 Spencer Game : ASUS R7-250 (Cape Verde) = 52-55fps


Basic Performance
X5000/20 Spencer Game : ASUS R7-240 (Oland) = 22-23fps

I thing that Amiga on the Lake have the following model. I am not sure of performance
but DDR3 cards have lower performance

HD7750 DDR3 Model

[ Edited by Spectre660 26.08.2018 - 15:08 ]