No, it 's a obvious sign of too much OC.
Hynix won't be stable over 1950 MHz with the common timkng straps.
Even with custom straps you are lucky if you can go over 2000 Mhz.
1950Mhz with 1500 timing should bring you about 28 mh/s.
yeah my hynix 480 and 470 cards i just used 1900-1925 some even as low as 1850 just to keep them stable
my feeling is 1 or 2mhs more hash is not worth me rebooting a rgig once everyday