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TEST RESULTS
Baseline, with Integrated Graphics: First, here are the results of
our baseline results of the system with just its integrated graphics, without
a discrete video card. We'll also need the power consumption reading during
CPUBurn to estimate the actual power draw of discrete card later.
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VGA Test Bed: Baseline Results
(no discrete graphics card installed)
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System State
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CPU Temp
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System Power
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AC
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DC (Est.)
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Idle
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22°C
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73W
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Unknown
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CPUBurn
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39°C
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144W
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115W
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Ambient temperature: 21°C
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Asus EAH3650 Silent:
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VGA Test Bed: Asus EAH3650 SILENT/HTDI/512M
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System State
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Sys. Fan Speed
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Noise Level
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GPU
Temp
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CPU
Temp
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System Power
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AC
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DC (Est.)
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Idle
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7V
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20 dBA
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43°C
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24°C
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93W
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71W
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CPUBurn
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44°C
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45°C
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165W
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133W
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CPUBurn + ATITool
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74°C
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46°C
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187W
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152W
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CPUBurn + ATITool
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9V
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21 dBA
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69°C
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41°C
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186W
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151W
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CPUBurn + ATITool
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12V
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23 dBA
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64°C
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37°C
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185W
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151W
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Ambient temperature: 21°C, ambient noise level:
18 dBA @1m.
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The passive heatsink employed by Asus passed our thermal testing with flying colors.
No artifacts or other instability was exhibited by the system during stress
testing and the temperatures were excellent. With the case fan at 7V, there
is very little airflow in our test system, yet the GPU temperature was a
very impressive 74°C under load. The previous two passively cooled cards
we tested, the Asus EN8600GT and EN9600GT Silent both exceeded 90°C under
the same conditions.
Our testbed setup has the system fan is in close proximity
to the CPU, resulting in much lower CPU temperatures when the system fan speed
is increased. At the same time, the GPU temperature also improved significantly.
Despite its distance from the graphics card, the rear exhaust fan's speed
had a dramatic effect on the GPU cooler's effectiveness. The system fan is
one of our reference Nexus 120mm fans and it is fairly quiet and not powerful
by any stretch of the imagination — this illustrates that no matter how little or distant,
system airflow is paramount for passive cooling components in a PC.
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