Asus P3-P5G33 Barebone Slim PC

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TEST RESULTS

Test Results: Asus P3-P5G33
Test State
Mean
CPU Use
Peak
CPU Use
System Power (AC)
Stock PSU
SS-400ET
Off
N/A
N/A
6W
6W
Idle
1%
2%
80W
65W
H.264
32%
52%
90W
78W
WMV3
27%
52%
90W
76W
WVC1
45%
61%
94W
80W
Blu-ray (HDD)
14%
27%
87W
74W
Blu-ray (Disc)
18%
35%
90W
77W
Prime95
100%
116W
101W
Prime95 + ATITool
100 %
116W
101W

Video Playback

Except for the H.264 test clip, which normally uses less CPU cycles to render than WMV3, overall, the video playback was good. Our Blu-ray title is encoded with MPEG-2 so it wasn't very demanding, and the GMA 3100 IGP had no problems with it.

Power/Efficiency

Idle power consumption was particularly high, due SpeedStep being broken. The Intel DG33TL drew about 10-15W less with EIST working properly (though some of this is accounted for the energy required to power the Blu-ray drive).

We also tested the system with a Seasonic SS-400ET 80 Plus power supply, which we usually use in our motherboard testing. Using the stock PSU resulted in a higher AC draw of between 12-15W. Assuming the Seasonic is 65% efficient at idle and 80% efficient at load, the Enertronics unit is only 53~70% efficient. We also measured a power factor of 0.65 through most of testing versus 0.97 for the Seasonic unit. It's a low efficiency power supply by today's standards.

Thermals & Acoustics

The Delta fan was the really the main noise producer and it had a very aggressive, almost growling tone. On a carpeted surface with the system laying horizontal and the cover on, the noise level registered 34 dBA at 1m. With the extra fan disabled, it lowered to 26 dBA. The thermal consequences of turning the fan off were apparent immediately. The CPU temperature increased by 9°C and the system temperature followed suit. Despite this the CPU fan did not ramp up and the system remained perfectly stable. It's probably a good idea to have an exhaust fan, but we recommend you use a quieter fan or to undervolt the one it ships with.

Thermal Results: Prime95 Torture Test
Exhaust fan state
CPU Temp.
System Temp.
NB Temp.
SB Temp.
Noise @1m
Enabled
55°C
33°C
42°C
33°C
34 dBA
Disabled
64°C
47°C
63°C
44°C
26 dBA
CPU and System temperatures reported by SpeedFan/PC Probe.
SB and NB temperatures obtained via laser thermometer.

The power supply, despite its two small fans, was not hard on the ears. Though it registered 1 dBA higher on our sound meter than the CPU fan at minimum speed, it had a very smooth noise profile. The CPU fan on the other hand, exhibited a very noticeable ticking. The PSU also did not generate any noticeable or measurable increase in noise when stressed with Prime95.

With a better CPU cooler, it would be quiet enough to be used as a home theater PC, even with the volume turned down. We initially tried to use the Arctic Cooling Alpine 7 Pro, but it was a few millimeters too tall (it's 86mm high). The Alpine 7 GT would be good a choice and if the auxiliary case fan is removed, the Zalman CNPS8700 would also fit.



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