Samsung or AcBel PSU?
And yes, they've "popped their tops".
You may notice all of them are Y-ed at the top to allow for such possible expansion...
whence they emit their preliminary death k-nell.
Usually, they'll dome like these discovered last night in a Quicksilver's PSU.
(Red dots on the domed / bulged ones. They're supposed to be flat on top.)
Or they may go straight to eruption, as evidenced with yours. Sorry.
But best that you've found it now, rather than later.
AND you can't really judge good or bad ones - by such mere appearance alone.
They can appear fine and still be failed or failing... 'specially them TEAPO caps.