"i was able to custom configure a quadro card with this server on Dels system soon after this server being launched but last time i checked i was not able to custom configure such"
From the Technical Guide:
The T620 supports graphics processing unit (GPU) technology, providing accelerated performance for a variety of applications including virtual desktop infrastructure (VDI) medical imaging and graphical rendering implementations.
http://i.dell.com/sites/content/shared-content/data-sheets/en/Documents/dell-poweredge-t620-technical-guide.pdf
I haven't worked with one of these, so I don't know their limitations and capabilities, but I probably wouldn't expect "normal" graphics use from them.