You are surprised that 1.4ghz cpus are running cooler than a 2000mhz cpu?
Regardless, here is what I stated in another thread about socket A cooling:
For price/performance, the ThermalTake Volcano 9 CU is incredible. It is not as pricey as a SLK900, in fact you can get it online for only $14, and yet it is a very powerful cooler. I use it on every socket A motherboard I own.