Right well here's what you should do to overclock your 2500k:
save your current profile in the bios
set the multiplier to By All Cores > 44
set the Load-line Calibration to Extreme
set the VRM Frequency to Manual > 350
set the Phase Control to Extreme
set the Duty Control to Extreme
set the CPU Current Capability to 110%
set the CPU Voltage to Manual Mode > 1.35v
set the DRAM Voltage to 1.5v
set the VCCSA Voltage to 1.125v
set the VCCIO Voltage to 1.15v
set the CPU PLL Voltage to 1.8125v
save this profile
If everything seems ok +1 the multiplier for 4.5GHz. You could start at 43 to be safe and work your way up.
Manually set base clock to 100, do not go beyond this!
Presumably you have got the drivers for the hd 6950 from ati? Personally I 'd recommend 11.4 drivers as opposed to the newer 11.6.
You will also want to install the updated intel rst (10), will help with the ssd, I presume this will be on the disc with the mobo....