SilverStone Precision PS07: Budget MicroATX Tower

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TEST RESULTS: Asus EAH6850 DirectCU

To simulate a more demanding gaming system, our second test configuration uses an HD 6850 graphics card from Asus. The 6850 uses about 100W more than the 5450, creating a hotter, more stressful environment.


Our test system with an Asus EAH6850 DirectCU.


System Measurements (Asus EAH6850 DirectCU)
System State
Idle
CPU + GPU Load
System Fan Speeds
7V
9V
12V
GPU Fan
Speed*
1580 RPM (minimum)
2780 RPM
2300 RPM
2040 RPM
CPU Temp
24°C
76°C
71°C
68°C
HD Temp
28°C
34°C
30°C
29°C
GPU Temp
42°C
90°C
90°C
90°C
GPU VRM Temp
48°C
88°C
88°C
88°C
SPL@1m
19~20 dBA
25 dBA
25 dBA
28 dBA
System Power
58W
277W
274W
274W
*set as low as possible to maintain a GPU temperature of ~90°C on load.
CPU fan set to 9V.
Ambient temperature: 22°C.

With the stock fans at 7V and our HD 6850's fan running at minimum speed, there was no measurable difference in noise when the system was idle. On load, the GPU fan had to be set to 2780 RPM to keep the GPU at the desired 90°C level. Bumping the system fans up to 9V allowed us to slow the video card fan by 480 RPM, but the noise level measured the same: 25 dBA@1m. This was the sweet spot as no extra noise was generated and the CPU and hard drive temperature improved by 5°C and 4°C respectively. Running the stock fans at full speed required a GPU fan speed of just over 2000 RPM, but the overall noise level was 3 dB higher and thermal improvements were minimal.


Our HD 6850 test system on load measured 25 dBA@1m with stock fans at 9V.


Asus EAH6850 DirectCU Configuration:
Comparison (Load)
Case
Fractal Define Mini
SilverStone TJ08-E
SilverStone PS07
Lian Li
PC-V354*
System Fan Speeds
2 x 9V
low/10V
2 x 9V
3 x 9V (two exhausts)
GPU Fan Speed
1670 RPM
2330 RPM
2300 RPM
1740 RPM
CPU Temp
65C
59°C
71°C
60°C
HD Temp
31°C
25°C
30°C
26°C
GPU Temp
89°C
89°C
90°C
89°C
GPU VRM Temp
90°C
87°C
88°C
76°C
SPL@1m
22~23 dBA
24~25 dBA
25 dBA
26 dBA
*PC-V354 tested with Noctua NH-C12P heatsink rather than the NH-U12P due to incompatibility.
CPU fan set to 9V.
Ambient temperature: 22°C.

The PS07 was more competitive with an HD 6850 installed, but the TJ08-E still beat it handily. Video card cooling was about the same as the GPU fan had to be set to around 2300 RPM in both cases to keep the GPU at ~90°C, but the TJ08-E's hard drive and CPU were 5°C and 12°C cooler respectively.

Update, July 12, 2012:
Some of our readers have suggested that the "pull" placement of the CPU fan puts it an unfair disadvantage against the other cases in our comparisons. We used this configuration because it was how we tested the Temjin TJ08-E. Also, we tested our CPU/heatsink combination in an open testing environment, the "push" placement was only 2°C cooler (64°C vs. 66°C), so the difference should be very minor.


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