The i5-2500 has a 95W TDP, so that's that. I saw other units like mine that shipped with i5's and a 300W PSU instead. No dedicated cards, but still. I mean, I think they intended (at that time) for people to make upgrades down the line (within the year or 2) to higher, powerful components without changing the PSU, right?
In theory, a i5-2500 and a R7 240/GT 1030 (30W) should be fine, right?