PowerColor SCS HD4650: A Fanless Budget 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
Ambient noise level: 11 dBA
System noise level: 12 dBA

PowerColor SCS3 HD4650:

VGA Test Bed: PowerColor SCS3 HD4650
System State
Sys. Fan Speed
SPL
@1m
GPU
Temp 1
GPU
Temp 2
CPU
Temp
System Power
AC
DC (Est.)
Idle
7V
12 dBA
46°C
48°C
23°C
89W
67W
CPUBurn
47°C
50°C
42°C
161W
130W
CPUBurn + FurMark
81°C
85°C
43°C
177W
143W
CPUBurn + FurMark
9V
15 dBA
80°C
83°C
39°C
177W
143W
CPUBurn + FurMark
12V
18 dBA
73°C
78°C
29°C
176W
143W
Ambient temperature: 21°C.

Testing was initially conducted with the system's only case fan, a Nexus 120mm, running at a paltry 7V. In this state, the card's cooler kept the GPU very cool when idle: less than 50°C. When the system was stressed, GPU temperatures stabilized in the low 80's which is more than adequate for a modern GPU — they typically have tolerances above 100°C. The card was artifact free during testing despite the lack of system airflow. When the system fan was sped up to 9V, GPU temperatures were only marginally affected. At 12V, there was an impressive 7-8°C improvement.



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