Latest c't magazine 3/2004 tested 35 mini-pc's on the European market and they measured their noise as well.
Code:
SFF maker / model dBA sone
Abit DigiDice AB-2003 46,1 3,7
AOpen XC Cube EZ18 32,2 1,4
AOpen XC Cube EZ 65 29,4 0,8
Asus DigiMatrix AB-V10 25,9 0,5
Asus Pundit AB-P 2600 46,6 2,9
Biostar iDEQ 200N 43,5 3,1
Biostar iDEQ 200P 39,1 2,2
Biostar iDEQ 200S 32,1 1,0
Biostar iDEC 200T 36,9 1,5
Biostar iDEQ 200V 30,3 0,8
Chenming Fusion H865G 41,7 2,8
Chenming Fusion 845E 32,6 1,0
Chenming Fusioni HK7N 37,7 1,6
ECS EZ-Buddie D1V7-2 36,2 1,5
ECS EZ-Buddie D4I4-1 35,5 1,0
Gigabyte G-Max Sa4 LB v2.0 36,8 1,8
Gigabyte G-Max TA4 V2.0 39,0 1,7
IWill XP4 EVO 42,8 2,5
IWill ZPC 35,2 1,6
MSI Hetis 865GV 33,8 1,2
Mega 180 34,6 1,4
Mega 651 36,7 1,2
QDI-S9881 43,3 3,3
Shuttle XPC SB62G2 39,9 2,1
Shuttle XPC SB65G2 36,6 2,0
Shuttle XPC SB75G2 36,2 1,7
Shuttle XPC SK43G 37,5 1,9
Shuttle XPC SN45G 32,8 1,2
Shuttle XPC SN85G4 29,1 0,8
Shuttle XPC SS56G 34,3 1,4
Shuttle XPC ST61G4 35,2 1,6
Shuttle XPC ST6K[Zen] 29,6 0,8
Soltek Qbic EQ-3401A 27,1 0,6
Soltek Qbic EQ-3402M 36,1 1,7
Soltek Qbic EQ-3702A 37,7 2,0
I'm not sure I understand their dBA measurement technique from their German description (I use mostly babelfish as my German is next to non-existent).
However, I think they used four parallel microphones at 50 cm from the computer and computed the dBA figure from them (?).
I think the dbA figures are maximum figures achieved when playing back DivX movie from the hard disk.
The magazine gives more weight to sone values as they reflect more accurately how human hearing scales loudness (1,0 being baseline, then 0,5 if half as loud and 2,0 twice as loud).
They give excellent mark in terms of acoustic performance to Asus DigiMatrix AB-V10 (sone rating 0,5).
I'm hoping the German speaking readers of the forum can fill in the details about the test methodology and other issues.
regards,
Halcyon