In Win BUC ATX Tower Case

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Test Results: Radeon HD 4870


HD 4870 test system.


System Measurements (HD 4870)
System State
Idle
CPU + GPU Load
System Fan Speeds
off
7V
CPU Temp
33°C
31°C
43°C
SB Temp
47°C
41°C
49°C
HD Temp
39°C
32°C
32°C
GPU Temp
77°C
71°C
85°C
GPU Fan
Speed
880 RPM
880 RPM
1770 RPM
SPL@1m
21 dBA
23 dBA
27 dBA
System Power
116W
114W
301W
CPU fan set to 100% speed.
Ambient temperature: 22°C.

Alone, our HD 4870 test configuration idled at just 21 dBA@1m, though it probably could've been quieter without the large vent on the side panel which is conveniently located next to the noisiest component, the graphics card. Turning on the stock fans and setting them to 7V increased the total system noise level to 23 dBA@1m, and helped the GPU, hard drive and southbridge cool down by 6~7°C. Full load brought a substantial rise in all temperatures except for the hard drive and caused the GPU fan to ramp up to 1770 RPM.



Our HD 4870 test system measured 23 dBA@1m when idle and 27 dBA@1m on load with the stock fans at 7V.

At idle the system was fairly quiet, with the various fans blending to create a relatively smooth profile. The broadband acoustics of the reference HD 4870 cooler meant that even on load, the high 27 dBA@1m noise level didn't sound half bad. It emitted a soft hissing type noise which we'd describe as bearable.

HD 4870 Configuration Comparison (Load)
Case
In Win Maelstrom
Zalman Z9 Plus
Fractal Define R2
In Win BUC
System Fan Speeds
top, rear, side @9V
top, rear & front @7V
rear, front & side @12V
top, rear, front @7V
SPL@1m
26 dBA
26~27 dBA
26~27 dBA
27 dBA
CPU Temp
43°C
44°C
48°C
43°C
SB Temp
45°C
50°C
45°C
49°C
HD Temp
35°C
32°C
34°C
32°C
GPU Temp
80°C
85°C
84°C
85°C
GPU Fan
Speed
1340 RPM
1580 RPM
1710 RPM
1770 RPM
SPL@1m
26 dBA
26~27 dBA
26~27 dBA
27 dBA
CPU fan set to 100% speed
All temperature results adjusted to 22°C ambient.

Compared to previously tested cases, the BUC's results are about average. Its thermal performance and noise output was on par with Zalman Z9 Plus which happens to have a similar layout. Of the four cases listed above, the In Win Maelstrom is the clear winner as it is the only one that with a massive side fan that more than makes up for noise escaping through its ventilated panel.



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