I installed the new drivers from ATIs site and lost about 600 points in vantage. Games felt more sluggish too. At the same time I installed the new Afterburner and decided to us it for my overclock and not the ATI CCC overdrive option. My card is already flashed with the ASUS bios so I have more than enough headroom in the drivers now. So, with the card OC'd in Afterburner something wasn't right (I didn't even unlock the overdrive feature at this point as I was only overclocking from MSI Afterburner). I disabled Afterburner and overclocked right through the CCC overdrive CP and amazingly all my benchmarks bounced back to where they were with the last set of drivers with the same OC (1000mhz core, 1300 ram). So after reinstalling drivers and Afterburner a few times I can now confirm that overclocks set within Afterburner are not the same as they are from CCC overdrive CP.
So for anyone wanting to get the most out of their 5870 be sure to use the CCC for your overclock - and if necessary for voltage you can use Afterbuner.
One last thing I didn't test and after all the testing I did do I'm not about to start fucking with this again.... I'm wondering if you don't unlock overdrive in the CCC panel maybe the drivers are will over-ride any over clocking and force stock clocks. Regardless of what you are telling Afterburner to do. Maybe someone else can test this theory. That might be another possibility.
So for anyone wanting to get the most out of their 5870 be sure to use the CCC for your overclock - and if necessary for voltage you can use Afterbuner.
One last thing I didn't test and after all the testing I did do I'm not about to start fucking with this again.... I'm wondering if you don't unlock overdrive in the CCC panel maybe the drivers are will over-ride any over clocking and force stock clocks. Regardless of what you are telling Afterburner to do. Maybe someone else can test this theory. That might be another possibility.