Nanoxia Deep Silence 1

Cases|Damping
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TEST RESULTS: Radeon HD 4870 System

System Measurements (HD 4870)
System State
Idle
CPU + GPU Load
Fan Voltage
5V
7V
9V
12V
CPU Temp
33°C
54°C
53°C
51°C
50°C
SB Temp
51°C
60°C
59°C
59°C
57°C
HD Temp
33°C
33°C
33°C
32°C
31°C
GPU Temp
77°C
88°C
88°C
87°C
87°C
GPU Fan
890 RPM
2080 RPM
2010 RPM
1950 RPM
1880 RPM
System Power (AC)
121W
322W
322W
321W
320W
SPL@1m
19 dBA
29~30 dBA
29 dBA
29 dBA
30 dBA
CPU fan set to 100% speed.
Ambient temperature: 22°C.

We started testing our HD 4870 test configuration with the three case fans all running at 5V which produced a noise level of a very reasonable 19 dBA@1m when idle. At load, the extra thermal output heated up the interior by +21°C for the CPU and +9°C for the Southbridge. The GPU temperature also increased by 11°C, stabilizing at 88°C with the GPU fan spinning at 2080 RPM. In this state, the noise level was a loud 29~30 dBA@1m.

Increasing the speed of the stock fans improved overall cooling, taking some of the pressure off the loudest component, the GPU fan. At 7V and 9V, the GPU fan slowed down somewhat resulting in a slight reduction in overall noise production, while at 12V, the end result was noisier. The sweet spot for cooling/noise appeared to be around 9V for the case fans.

System Measurements (HD 4870): Load
Adjustments
Stock
Chimney raised
HDD cages removed
CPU Temp
51°C
51°C
51°C
SB Temp
59°C
59°C
57°C
HD Temp
32°C
32°C
31°C
GPU Temp
87°C
87°C
86°C
GPU Fan
1950 RPM
1950 RPM
1850 RPM
SPL@1m
29 dBA
29~30 dBA
28 dBA
System Power (AC)
321W
321W
322W
CPU fan set to 100% speed.
System fans set to 9V.
Ambient temperature: 22°C.

Staying at 9V, we then tested the effectiveness of raising the case's chimney vent. Surprisingly, it had absolute no effect on cooling. What it did do was allow extra noise to escape out the top, about 1 dB's worth. The feature could be more helpful in a more thermally demanding environment (like the dual video card setup tested later).

As we noted earlier, the drive cages are extremely restrictive, so the top two cages were removed, leaving our test hard drive in the bottom cage. It's the most structurally stable of the three being secured at the bottom and the side, and it is the coolest position, as heat rises. This move was quite beneficial — without the impedance of the drive cage, the upper intake fan aided in GPU cooling, allowing the video card fan to slow by 100 RPM for a 1 dB drop in noise.

HD 4870 Configuration Comparison (Load)
Case
Fractal Define R2
Corsair 550D
NZXT H2
Deep Silence 1
BitFenix Ghost
Fan Voltage
rear, front, side @12V
rear, fronts @9V
rear, fronts @med
rear, fronts @9v
rear, front @12V
CPU Temp
48°C
44°C
53°C
51°C
48°C
SB Temp
45°C
54°C
52°C
57°C
55°C
HD Temp
34°C
32°C
33°C
31°C
34°C
GPU Temp
84°C
86°C
87°C
86°C
87°C
GPU Fan
Speed
1710 RPM
1890 RPM
2110 RPM
1850 RPM
2020 RPM
SPL@1m
26~27 dBA
27 dBA
27~28 dBA
28 dBA
29~30 dBA
CPU fan set to 100% speed
All temperature results adjusted to 22°C ambient.

The Deep Silence 1 most closely matches up to the Corsair Obsidian 550D in size and features, but wasn't up to snuff in performance. The 550D had a sizable advantage in CPU cooling and a slight edge in noise as well. Pitted against the NZXT H2, it was more or less neck-and-neck. The case only fared favorably against the BitFenix Ghost, which we found to be seriously flawed with panels that are too acoustically transparent for a silent chassis.



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