So I took a look at the manual for the SX98GT512-D3L-NM and under the hood of the 560s and found two issues.
Firstly there's no bundled shorter faceplate for SFF desktops... which is a bit illogical.
And secondly it needs a direct hook into the APU - which the Inspiron 560s doesn't have available.
So let's forget retailers...
Can anyone recommend a good graphics card, thats small-form-factor *with* the short faceplate, that doens't need a line into the power supply?