Antec Nine Hundred Two Gaming Case

Cases|Damping
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TEST CONFIG #2 (HD 4870)


Case with test system installed (HD 4870).

System Measurements (HD 4870)
State
Idle
Load
Load
Front Fan
Speed
Off
Min.
Noise
23 dBA
27~28 dBA
29 dBA
CPU Temp
35°C
55°C
56°C
SB Temp
49°C
56°C
53°C
HD Temp
37°C
37°C
35°C
GPU Temp
79°C
87°C
86°C
GPU Fan
Speed
940 RPM
1860 RPM
1770 RPM
CPU fan speed set to 100%; rear and top fans set to low.
Ambient temperature: 28°C.

With a HD 4870 installed in the system, we decided to run it with both the rear and top fans on low. The SPL with only one of these fans turned on low was about 22.5 dBA and including the second fan increased it to only 23 dBA. Adding the graphics card increased the Southbridge temperature by 12°C idle and 16°C on load. The graphics card effectively cuts off most of the airflow around the southbridge, and the GPU itself is fairly hot, so this was not surprising. Turning on the bottom front fan to its minimum speed resuilted in slightly better system temperatures and a moderate noise increase, about 2 dB.

Comparisons

HD 4870 Configuration Comparison (Load)
Case
Sileo 500
Sonata Elite
Nine Hundred Two
Fan Speeds
(Rear / Front
or Top)
100% / 100%
Low / NA
Low / Low
Noise Level
25 dBA
25~26 dBA
27~28 dBA
CPU Temp
56°C
55°C
49°C
SB Temp
53°C
53°C
50°C
HD Temp
34°C
32°C
31°C
GPU Temp
87°C
88°C
81°C
GPU Fan
Speed
1920 RPM
1980 RPM
1860 RPM
CPU fan set to 100% speed.
Ambient temperature: 22°C (results adjusted accordingly)

In the HD 4870 configuration, the Nine Hundred Two recorded noticeably better thermal measurements compared to the Sonata Elite and Sileo 500. The CPU temperature was 5-6°C cooler and the Southbridge temperature was 3°C better. The Nine Hundred Two's hard drive temperature even edged out the Sonata Elite. The GPU was 6-7°C cooler, so the GPU fan did not have to spin quite as fast.

The Nine Hundred Two's baseline noise (system fans running with the case empty) was 20 dBA compared to 19 dBA for the Sonata Elite. With the VGA fan spinning 120 RPM slower, you may be wondering why the system measured 2 dBA higher. We believe the higher ambient temperature (28°C vs. 25°C) in the room resulted in the power supply fan spinning faster. Unfortunately, our lab is not equipped with air conditioning, and the day we tested it was, up to that point, the hottest day of the month. It was the middle of a heat wave afflicting the Pacific northwest and the high that day was 31°C — Vancouver rarely sees temperatures above 25-26°C.



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