|Going from 2.8GHz to 3.0GHz isn't much of a jump & I wouldn't expect you'd notice much of a difference, if at all.|
We need to know which motherboard you have & which speed DDR2 RAM. Based on your pics, the board is a Gigabyte GA-M61P-S3:
On AMD systems, the RAM speed is tied in with the CPU multiplier. The fact that your RAM is only running at 255MHz (510MHz DDR) means you probably have DDR2-533 rather than DDR2-800. You'd get better performance using DDR2-800.
Anyhow, if 3.0GHz is all you're looking for, all you need to do is enter the BIOS & enter these settings:
Under Advanced BIOS Features:
AMD K8 Cool&Quiet control - disabled
Under MB Intelligent Tweaker(M.I.T.):
CPU Frequency(MHz) - 215
PCIE Clock(MHz) - 100
CPU Clock Ratio - 14x
Save & Exit.
When you reboot, your system will run at 3.01GHz (14 x 215MHz) with the RAM running at approx 274MHz (547MHz DDR). And since Cool 'n' Quiet is disabled, the CPU will run at full clock speed at all times.