700mhz wall on HD4850 is smashed.

[jason4207]

lower the clock or hard mod for more volts
it's not stable

Ummm...I am hard-modded. See sig. I don't see why CAT 8.8 would require more volts to be stable at the same speed as opposed to CAT 8.7. It seems more like a powerplay issue. I can get to Windows, but if I try to open GPU-Z for instance I get either a black screen, no monitor input, a blue screen (not BSOD), a blue screen w/ vertical stripes, or a white screen...strange. I also noticed 1 red light come on on the 4850 after it blanked out.

I've been testing CAT8.8 on XP-32, but I run a dual-boot, and can still get into VISTA-64 w/ CAT8.7 w/o any issues. Also, restoring XP-32 back to CAT8.7 works fine as well. 8.8 works fine in XP w/ stock BIOS.

@ perkam: 750+ is easy with a voltmod and decent cooling. But a good air or water cooler is a must.. pencilmod is as easy or difficult as with 3870..

@ jason: black screens are gone here since i figured out leaving the last voltage setting blank (it will get that voltage from the other fields...) but it throws those stripey gray screens and sometimes freezes.. strange.. hope for rbe new version

I used your template. Only thing I changed was the max clocks. I'm running 820/1200 w/ 1.35v/2.10v. So, I guess I'll have to stick w/ CAT8.7 until someone figures this out. Lowering my clocks is not an effective solution unless 8.8 can give some serious clock-for-clock improvements.

Did you change any other settings in RBE? What settings are you using on the 'Additional Features' tab? I also tried to change the 'One-click update' and the 'Also decreases voltage' checkbox, but that didn't do anything for stability.

And does anyone know if the 'Also decreases voltage' checkbox will allow us to set the 2D voltage lower than before? Since my hard-mod increases all voltages I'd like to set 2D even lower, so idle temps/power consumption can be as low as possible when running 250/500 or 500/750.