Be careful, it could be that you did not get a good processor for overclocking. Mine needs 1.275 V Vcore to mount to 4.2 Ghz.
So do not think you will surely be able to reach 4.5 GHz easily.
Otherwise, it's a good processor that does not heat too (never more than 80 ° C with the stock cooler), even when he has a heavy workload and is overclocked.