stock cooling expect 3.4->3.6ghz stable. but around 3.6 it starts getting a bit warm on stock cooling. ive had mine @ 4.2ghz stock cooling for benchies. but to have it up around that high you would want aftermarked cooling.
my best super pi 1.5 1m is 9.906 btw
3dmark 05 was just under 30,000 with stock gtx 275