Probably not, since you've only got a 270W PSU in that system. That almost certainly rules out the 7750, and you'd have to check what the requirements are for the 6670 and 610 respectively. If any card you are looking at needs more than about a 250W PSU, don't buy it, you'd just be asking for trouble. Even better would be to figure out the power draw of your current 520 then use that as the ceiling for any new card you look at.
My 3years nvidia Gt 520 dying soon.
Will my spec support a Low profile HD 6670 or 7750? What i knew is that a GT 610 would work on my current specs but well a rename card
Also i don't intend to change my psu.
Cpu Spec -> http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c03024943