Re: Need some help getting to 2.8GHz with my A64 x2 4800.
If you can, I would try dropping the memory divider and the HTT multiplier. You can put them below the rated settings aka HTT under 1000, and ram under whatever they are. So if ram is pc3200, make sure it is at least 400 or below. This will take the bottleneck off of these components, and will help to test to make sure that they aren't contributing.
It might be that you CPU simply can't do over 2.7, no matter what you try. I can't get my FX-60 over 2.9 stable, even with max voltage on the processor.