Problem with Overclocking?

Lathishment

Honorable
Aug 19, 2013
57
0
10,630
Hi, I just got a Gigabyte r9 270 and want to overclock it. I went to MSI afterburner and unlocked voltage control but I can't seem to OC it, everything stays the same. I watched other sites OC the r9 270 and have insane Memory clock mhz as well as core clock. Mine can only get up to 1500 mhz on the memory clock and 1050 mhz on the core clock, I have seen people go 6000 Mhz on the r9. Is it my hardware or specific GPU? I am new to OC'ing and know very little. My hardware is

CPU:Intel core i5 750

GPU:Gigabyte r9 270

Mobo:p7p55

Ram: 8 gigs of corsair vengeance ddr3 ram