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Noise & Cooling Comparison
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5570 idling.
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5570 at full load.
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At one meter distance, our test system measured 17 dBA when idle and 20 dBA
at load with the HD 5570 running inside. At idle, The fan emitted a soft hissing
type noise, and a slight whine was noticeable when we took the side panel off
our case. It was fairly smooth when fully enclosed though. On load, the whine
became audible, and there was a lot more turbulent noise.
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Noise & Cooling Comparison
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Card
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Idle
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Load
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SPL @1m
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GPU Temp
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SPL @1m
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GPU Temp
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ATI Radeon HD 4670
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13 dBA
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46°C
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16 dBA
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83°C
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ATI Radeon HD 5570
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17 dBA
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36°C
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20 dBA
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73°C
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ATI Radeon HD 4770
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15 dBA
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53°C
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17 dBA
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74°C
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ATI Radeon HD 4830
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14 dBA
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56°C
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20~21 dBA
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86°C
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Ambient temperature: 22°C
Ambient noise level: 11 dBA
System noise level: 12 dBA
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Compared to the midrange cards from ATI's previous generation, the HD 5570's
fan control settings seem overly aggressive, particularly when idle. A reduction
in fan speed when the GPU core is only 36°C would hardly be detrimental.
A slow down on load would be welcome as well; we'd be comfortable letting the
GPU temperature slip into the 80°C range.
Power
The power consumption of an add-on video card can be estimated by comparing
the total system power draw with and without the card installed. Our results
were derived thus:
1. Power consumption of the graphics card at idle - When CPUBurn is
run on a system, the video card is not stressed at all, and stays in idle mode.
This is true whether the video card is integrated or an add-on PCIe 16X device.
Hence, when the power consumption of the base system under CPUBurn is subtracted
from the power consumption of the same test with the graphics card installed,
we obtain the increase in idle power of the add-on card over the
integrated graphics chip (Intel GMA950). (The actual idle power
of the add-on card cannot be derived, because the integrated graphics does draw
some power — we'd guess no more than a watt or two.)
2. Power consumption of the graphics card under load - The power draw
of the system is measured with the add-on video card, with CPUBurn and FurMark
running simultaneously. Then the power of the baseline system (with integrated
graphics) running just CPUBurn is subtracted. The difference is the load power
of the add-on card. (If you want to nitpick, the 1~2W power of the integrated
graphics at idle should be added to this number.) Any load on the CPU from FurMark
should not skew the results, since the CPU was running at full load in both
systems.
Both results are scaled by the efficiency of the power supply (tested
here) to obtain a final estimate of the DC power consumption.
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Estimated Power Consumption Comparison (DC)
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Card
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Idle
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Load
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ATI Radeon HD 5450 512MB
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6W
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7W
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Asus EN9400GT Silent 512MB
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11W
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23W
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PowerColor HD 4650 512MB
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15W
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28W
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ATI Radeon HD 5570 1GB
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8W
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29W
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ATI HD 4670 512MB
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3W
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40W
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ATI HD 4770 512MB
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28W
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60W
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Asus EN9800GT Matrix 512MB
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32W
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80W
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ATI HD 4830 512MB
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18W
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87W
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The HD 5450 is easily the most energy efficient graphics card we've tested,
using half the power of the GeForce
9400 GT when idle, and less then a third on load. The 5570 uses about
5W more than 4670 when idle, but 11W less on load.
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