Difference in overcloking potential amongst GPU's .

Lenyuusha

Honorable
Jan 16, 2014
17
0
10,510
I just recently ordered the sapphire R9 290 Tri-x and as I was reading up on the reviews I noticed that one reviewer had a very poor overcloking experience. All the while three other reviewers didn't encounter this problem, on the contrary they managed to squeese a pretty decent overclock out of the 290. Is this a common thing amongst graphic cards? If so then let's say out of every 10 graphic cards made how many will have poor overclocking ability?