ninja scythe is good lah!!! Only problem is that it's too big. Some casing will have problems catering for it. Mine is running awesome. Load is 52c with moderate overclocking.

BTW, you should know that different motherboard will give different reading because of the way temp probe and temp chipset are implemented. Asus might give 50c but jetway may give 48c or abit may give 45c. As long as you don't see too high temp then it should be fine.