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TEST RESULTS: Asus EAH6850 DirectCU
To simulate a more demanding, gaming type of 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.
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System Measurements (Asus EAH6850 DirectCU)
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System State
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Idle
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CPU + GPU Load
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System Fan
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9V
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10V
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12V
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GPU Fan*
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1710 RPM
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2380 RPM
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2330 RPM
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2060 RPM |
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CPU Temp
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21°C
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63°C
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59°C
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56°C
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HD Temp
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23°C
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25°C
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25°C
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23°C
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GPU Temp
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39°C
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90°C
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89°C
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90°C
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GPU VRM Temp
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44°C
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86°C
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87°C
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87°C
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SPL@1m
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20~21 dBA
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24~25 dBA
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24~25 dBA
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28~29 dBA
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*set as low as possible to maintain a GPU temperature of ~90°C.
CPU fan set to 9V.
Fan controller set to low.
Ambient temperature: 22°C.
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When idle, the addition of the EAH6850 had only a small acoustic impact, increasing the noise level by 1~2 dB and imbuing the system with a slightly harsher sound. On load, after toying around with the fan speed we found that low/10V gave us the best balance of performance-to-noise. At 9V we had to run the GPU fan a bit faster so there was no noise advantage, but the resulting CPU temperature was 4°C higher. 12V allowed us to drop to slow the GPU fan by ~300 RPM, but exchanging an extra 4 dB for marginal CPU and hard drive cooling improvements was an unbalanced trade.
It should be noted that SilverStone recommends using a graphics card with a fan that blows air out the back, following the same airflow path as the case's intake fan while our test card uses a downblowing heatsink with the exhaust coming off both sides. This type of cooler may perform better with the TJ08-E's design.
Our EAH6850 test system on load measured 24~25 dBA@1m.
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Asus EAH6850 DirectCU Configuration:
Comparison (Load)
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Case
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SilverStone TJ08-E
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SilverStone FT03*
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Lian Li PC-V354*
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System Fan Speeds
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low/10V
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3 x 7V
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3 x 9V (two exhaust, one intake)
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GPU Fan Speed
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2330 RPM
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1790 RPM
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1740 RPM
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CPU Temp
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59 °C
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58°C
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60°C
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HD Temp
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25°C
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35°C
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26°C
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GPU Temp
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89°C
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89°C
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89°C
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GPU VRM Temp
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87°C
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88°C
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76°C
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SPL@1m
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24~25 dBA
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25 dBA
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26 dBA
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*Due to compatibility issues, the FT03 was tested with a Seasonic X-650 power supply (vs. Cooler Master M700) and the PC-V354 with a Noctua NH-C12P heatsink (vs. NH-U12P).
CPU fan set to 9V.
Ambient temperature: 22°C.
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The TJ08-E ekes out a slim but clear victory over the FT03 and PC-V354. Its overall thermal performance was superior, and it noise level was a tad lower as well.
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