You'll never notice the differance unless compared side by side. I had 3 identical systems. 1 was never overclocked, 1 was moderately & 1 was always o/ced. BE6-II's/300a's.
I got bored 1 day and switched cpu's thru 1 of the systems. The one never o/ced still had very good image quality after 3 years. The 1 moderately, showed only a 'fair' image quality & the 1 always o/ced had me making up my mind that I would in fact replace my cpu every year. The very poor image quality 'shocked' me, but again, it was only noticeable side by side but it WAS ugly.
jme