I know it's cool to have the coolest idle temps on air, but your load temps look just fine--54C under Prime95 or orthos load is normal--as long as that's below the thermal ceiling of the CPU, then what does it matter what your idle temps are? Also, what's the ambient temperature of where you're at? Recently weather's been warmer in my neck of the woods--mid 80'sF--my idles were around 27C before, and now they're in the mid-30C's. So it might just be warm ambients? But really, as long as the load temps are normal (which they are), then I wouldn't worry about it.