Hi all.
As I don't speak Chinese ,I will write in English so I hope you understand me :).
First of all your Llano is not working at 5.4Ghz,there is a bug in bios.Actual clock speed is around 3Ghz (when you see 5.4GHz in CPUz). The ratio between REAL clock and what you see is around 1.75x. So when you saw 2.4Ghz it was actually locked at 1.4GHz,when you saw 4.7GHz it was performing tests at actual clock of ~2.68Ghz.. You get the picture :). It is evident from your 3dmark06 CPU test,CPUmark99,superpi and ESPECIALLY AIDA64 results which are all in line with Phenom II @ ~3GHz.
So this Llano sample has some "brake" in BIOS that is limiting your multiplier to 15 or 15.5x,even if you manually select 54x.
So to recap everything:
-Llano's turbo mode is broken on your sample,
-real clock is 1.75x lower than what CPUz reports(2.4Ghz->1.4GHz,4.7Ghz->2.68Ghz,5.4Ghz->3.05Ghz)
-results are in line with Phenom II ,clock per clock,give or take a few percent.
Just wanted to point out this obvious thing to all of you,so you all don't think Llano is slower than K7 at the same clock speed :D.
Cheers!