8rda+ agp voltage question..

How much is safe?
Right now I have it set at 67..

are you talking about voltage or frequency?

stock is 1.5v and 66mhz for most cards i believe

1.5 for voltage and atuo is default.

I use 1.6 just to make sure the voltage to the card never drops below 1.5 and for the freqency I use 68-69. Some cards can handle higher frequency but I myself wouldn't get it above 70 or 71 for no reason I have used 70 before but didn't work 68 is the best for me unless my room is really cold and I'am benching I'll use 69.

Benching I use 92Mhz and 1.8v's...normal use, I use 1.6v's and 66Mhz. People get the best out of there cards between 66-70Mhz in normal use and 1.6v's.

Running 1.6v's 24/7 wont hurt your card, but keeping it OCed 24/7 will.