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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)
|
|
System
State
|
System Power
|
|
AC
|
DC (Est.)
|
|
Idle
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73W
|
Unknown
|
|
CPUBurn
|
144W
|
115W
|
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Ambient temperature: 21°C
Ambient noise level: 11 dBA
System noise level: 12 dBA
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ATI Radeon HD 4870 1GB:
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VGA Test Bed: HIS Radeon HD 4890 Turbo Edition
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|
System State
|
Fan Speed
|
SPL
@1m
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GPU
Temp
|
Mem. Temp
|
Shader Temp
|
System Power
|
|
AC
|
DC (Est.)
|
|
Idle
|
1400 RPM
|
15 dBA
|
60°C
|
71°C
|
63°C
|
139W
|
111W
|
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CPUBurn
|
61°C
|
71°C
|
65°C
|
227W
|
186W
|
|
CPUBurn + ATITool
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2100 RPM
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25 dBA
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71°C
|
81°C
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75°C
|
292W
|
239W
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CPUBurn + FurMark
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2340 RPM
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26 dBA
|
75°C
|
85°C
|
79°C
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324W
|
264W
|
|
Ambient temperature: 21°C.
Temperatures recorded via GPU-Z.
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During testing, temperatures stayed well within reasonable levels — at full
load, the GPU core temperature measured only 75°C. The relatively low temperatures
were the result of the card's cooling fan being more aggressive than we are
used to seeing. It sped up early and often once a load was applied to the GPU.
Idle, the fan spun at approximately 1400 RPM and measured 15 dBA. It was audible,
but soft sounding, like an optical drive spinning at a low speed. When the fan
speed stabilized on load, it was much louder. It measured 26 dBA and had a lot
more hiss due to higher air turbulence (though much of it was blocked
out by our case side panel), as well as a nasty growl.
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VGA Test Bed: HD 4890 vs. HD 4870
|
|
System State
|
HIS Radeon 4890 Turbo 1GB
|
ATI Radeon 4870 1GB
|
|
Fan Speed
|
SPL
@1m
|
GPU
Temp
|
Fan Speed
|
SPL
@1m
|
GPU
Temp
|
|
Idle
|
1400 RPM
|
15 dBA
|
60°C
|
990
RPM
|
13 dBA
|
76°C
|
|
CPUBurn
|
61°C
|
78°C
|
|
CPUBurn + ATITool
|
2100 RPM
|
25 dBA
|
71°C
|
1750 RPM
|
20 dBA
|
83°C
|
|
CPUBurn + FurMark
|
2340 RPM
|
26 dBA
|
75°C
|
1750 RPM
|
20 dBA
|
85°C
|
|
Ambient temperature: 21°C.
Temperatures recorded via GPU-Z.
|
Compared to our reference HD 4870 sample, it is clear the HD 4890's fan control
is much more active, resulting in higher noise levels, but lower temperatures.
The reference 4870 could conceivably find a place in a quiet PC since it is barely audible
when idle. The same cannot be said of the reference 4890.
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