Viako Mini Letter ML-80 H61 Sandy Bridge Barebones PC

Cases|Damping | Complete|Mobile Systems
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Thermal & Acoustic Performance

System Measurements
System State
Temperatures
Power (AC)
SPL @0.6m
CPU
HDD
Ext*
Off
N/A
1W
N/A
Sleep (S3)
2W
Idle
22°C
32°C
28°C
26W
29 dBA
H.264 Playback
24°C
33°C
28°C
32W
CPU Load
49°C
36°C
34°C
69W
CPU + GPU Load
58°C
41°C
36°C
86W
CPU Load
(sys. fan off)
54°C
43°C
35°C
70W
23~24 dBA
CPU + GPU Load (sys. fan off)
64°C
46°C
39°C
87W
Ambient temperature: 21°C.
Ambient noise level: 10~11 dBA.
*External temperature measured using an IR thermometer pointed at the hottest portion of the chassis (near the 50 mm exhaust fan).
Note: disabling the VFD/remote software results in an average power savings of 2W.

The ML-80 proved to run fairly cool with a Core i3-2100 paired with a Scythe Big Shuriken. On full synthetic load the CPU temperature stabilized under 60°C with the CPU fan spinning at the lowest speed allowed by the board's fan control system. Hard drive temperatures were reasonable as well and the exterior of the case was warm to the touch but not overly so.

The noise level of the system unfortunately was quite high at 29 dBA@0.6m, 4~5 dB higher than the ML-45 Fusion based barebones we reviewed not too long ago. The 50mm exhaust fan was the main reason for this difference, a much louder model than the one included in our previous Mini Letter. Turning it off resulted in a 5~6 dB improvement though we did record 5~7°C rise in internal temperatures, a worthwhile tradeoff.


Our system featuring a Momentus XT and Big Shuriken at ~820 RPM measured 23~24 dBA@0.6m.

With only the hard drive and Scythe Big Shuriken fan generating noise, the acoustics of our ML-80 system were quite smooth. The hard drive emitted a slight hum as one would expect, but the sound of the fan was incredibly soft.

Mini Letter Comparison
Test State
Viako ML-45
(E-350)
Viako ML-80
(i3-2100 + Big Shuriken)
CPU Temp
System Power (AC)
CPU Temp
System Power (AC)
Idle
50°C
17W
25°C
26W
H.264 Playback
58°C
23W
26°C
32W
CPU Load
66°C
26W
54°C
70W
CPU + GPU Load
76°C
34W
64°C
87W
SPL @0.6m
24~25 dBA
23~24 dBA
Ambient temperature: 21°C.
Ambient noise level: 10~11 dBA.

Compared to the Fusion based Mini Letter, the ML-80 consumes about 9W more when idle and playing video. Our build with the Big Shuriken ran quieter and much cooler both on light load and heavy.



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