M1KES :
Thank you for clearing that up.. so what i understanding is that there is a 20-30% jump from the quads to these sandy bridge ones.. seems alot.
From the Q9650 to the next generation of processors, such as the i5-750 or i7-920, the chip is approximately 15% more powerful at the same clock speed. From the i5-750/i7-920 to the new sandybridge chips there is approximately another 15% more power at the same clock speed. So from the Q9650 to the 2500k there is roughly 33% more power at the same clock speed.
But that is only part of the story because the newer processors start at higher clock rates and can turbo boost even more.
The Q9650 runs at 3.0GHz. The 2500k runs at 3.3GHz, up to 3.7GHz in some conditions. At 3.3GHz that is 10% higher clock rate, and then consider the 33% more power and the 2500k is at least 46% faster than the Q9650. Of course you can overclock the Q9650 to approximately 4.0GHz which would put it very close to the power of a stock 2500k.