Asus EN3650 Silent Graphics Card

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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.

VGA Test Bed: Baseline Results
(no discrete graphics card installed)
System State
CPU Temp
System Power
AC
DC (Est.)
Idle
22°C
73W
Unknown
CPUBurn
39°C
144W
115W
Ambient temperature: 21°C

Asus EAH3650 Silent:

VGA Test Bed: Asus EAH3650 SILENT/HTDI/512M
System State
Sys. Fan Speed
Noise Level
GPU
Temp
CPU
Temp
System Power
AC
DC (Est.)
Idle
7V
20 dBA
43°C
24°C
93W
71W
CPUBurn
44°C
45°C
165W
133W
CPUBurn + ATITool
74°C
46°C
187W
152W
CPUBurn + ATITool
9V
21 dBA
69°C
41°C
186W
151W
CPUBurn + ATITool
12V
23 dBA
64°C
37°C
185W
151W
Ambient temperature: 21°C, ambient noise level: 18 dBA @1m.

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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