The HP T5540 has no Fans, that's correct. I am not sure about the 0,053 VCore: it seems me too low,
even for a VIA C7-M ultra low voltage processor (non-ulv VIA C7 models need about 0,8 Volt)
The voltage does btw. not change under heavy CPU load.
The HP T5540 is a thin client, maybe the voltages are different from usual desktop systems?
(It has an external PSU which provides 12V/4,16A to the thin client)
Too bad that the thin client has no temparatur sensors