146 for pcie is just crazy.
Yes u can damage your card, even kill it doing that.
Not one of those 'tall tales' either, it does happen, many ppl dont know why tho.
It mostly happens when ppl set it to auto, then OC.
PCIE frequency is linked to fsb, so that rises with ur oc, then ur card goes.
Same with ur 33Mhz for hdds, rises with oc.
Id set all these to manual 100 and 33. Just so ur sure.
As for ur card... only way to tell if its damaged is to test it with games and benches.