@popatim: No, a 7750 will not work as the 8100 SSF mainboard only provides a max power output of 35 watts to the pci-e slots. The 7750 requires 50 watts minimum.
Lol, This was a LONG time ago. Sorry for not picking an answer... I've already slapped in a R7 240... I was originally running before the r7 a Gt 620 Oc'd. but, the r7 240 works just fine now
but, thanks for the info! will keep that in mind.