I have a Sapphire 4830 and I have BIOS flashed it to my stable clocks of 741 on the core and 1080 on the memory. Today I decided to venture into waters unknown and do a pencil voltage mod. Everything went as planned and now instead of 1.15 volts on the core I have 1.28 BUT the problem I'm having is that every time I go into Rivatuner 2.24 and increase the core clock just a teensy little bit (from 741 to 743) Furmark crashes after about a minute or so. I even did the unthinkable and underclocked it a little bit and it still crashes! BUT when I set everything back to normal (741 on the core, 1080 on the memory) it runs Furmark just fine for hours and hours. I have tried an older version of CCC, 8.12 which I think is what I had when I first bought this card, and it still crashes at even the slightest change of clocks, NOT using the Overdrive feature of course. However I clocked it to 769 on the core and ran the ATi Tray tools artifact scanner and it was stable for 20 minutes with temps topping out at 72C so I thought to myself "hey it's stable!" but after a half hour of Fallout 3 it crashed
So, what do you think could be the problem?
So, what do you think could be the problem?