If your computer case has pretty good airflow through it, you should be fine. Monitor your temperatures and then, if you need it, upgrade your cooling.
I would think you'd be fine with sto0ck cooling even in 30 degree ambient temps.
I doubt your CPU/GPU will be 99%+ stressed for extended periods of time.
I know while gaming and stress testing my GPU can go 20 degrees or more higher, and only then is it a problem.
------------------------------You can select me as Best Answer e6400 oc'd 3.2ghz,CCF cooler
3870x2, p5k/epu
750watts psu, antec 900
Reply to overshocks
If your computer case has pretty good airflow through it, you should be fine. Monitor your temperatures and then, if you need it, upgrade your cooling.