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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 power draw of discrete card later.
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VGA Test Bed: Baseline Results
(no discrete graphics card installed)
|
|
System
State
|
System Power
|
|
AC
|
DC (Est.)
|
|
Idle
|
75W
|
Unknown
|
|
CPUBurn
|
151W
|
121W
|
|
Ambient temperature: 22°C
|
ATI Radeon HD 5450:
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VGA Test Bed: ATI Radeon HD 5450 512MB
|
|
System
State
|
Sys. Fan Speed
|
SPL
@1m
|
GPU Temp
|
System Power
|
|
AC
|
DC
|
|
Idle
|
7V
|
12 dBA
|
44°C
|
83W
|
62W
|
|
CPUBurn
|
45°C
|
158W
|
127W
|
|
CPUBurn + ATITool
|
68°C
|
159W
|
128W
|
|
CPUBurn + FurMark
|
69°C
|
|
9V
|
15 dBA
|
68°C
|
158W
|
127W
|
|
12V
|
18 dBA
|
66°C
|
157W
|
126W
|
|
Ambient temperature: 22°C
Ambient noise level: 11 dBA
|
The reference heatsink cooled the graphics card very well, keeping the GPU
core well below 50°C when idle and just under 70°C on load. Increasing
the speed of the system fan in our airflow-starved VGA test system had only
a small effect on the thermal results. It's fair to say that the large passive
heatsink can keep the GPU comfortably cool in most thermally-demanding environments.
Interestingly, stressing the CPU and GPU combined only increased the power
draw by 1W compared to the CPU alone. This is surprising as even ATI's integrated
graphics typically generate higher power consumption in the order of 10W.
ATI Radeon HD 5570:
|
VGA Test Bed: ATI Radeon HD 5570 512MB
|
|
System
State
|
VGA Fan Speed
|
SPL
@1m
|
GPU Temp
|
System Power
|
|
AC
|
DC
|
|
Idle
|
15%
|
17 dBA
|
36°C
|
85W
|
63W
|
|
CPUBurn
|
37°C
|
161W
|
129W
|
|
CPUBurn + ATITool
|
24%
|
19~20 dBA
|
65°C
|
177W
|
143W
|
|
CPUBurn + FurMark
|
32%
|
20 dBA
|
73°C
|
185W
|
150W
|
|
Ambient temperature: 22°C
Ambient noise level: 11 dBA
System noise level: 12 dBA
|
The 5570 stock cooler got the job done as well, with idle and load temperatures
of only 36°C and 73°C respectively. The fan ramped up fairly smoothly,
but spun a little too fast for our liking. The power draw increased by only
21W when the GPU was stressed with FurMark, so the card does not require much
power; it shouldn't take much to cool it adequately.
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|
