SilverStone Fortress FT04 Tower

Cases|Damping
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TEST RESULTS: DUAL RADEON HD 4870 CONFIGURATION

System Measurements (2 x HD 4870)
System State
Idle
CPU + GPU Load
System Fan Speeds
500 RPM
800 RPM
1000 RPM
CPU Temp
28°C
42°C
40°C
38°C
SB Temp
57°C
69°C
67°C
63°C
HD Temp
31°C
30°C
30°C
28°C
GPU #1 Temp
78°C
88°C
86°C
85°C
GPU #1 Fan
Speed (auto)
1000 RPM
2150 RPM
1960 RPM
1940 RPM
GPU #2 Temp
64°C
84°C
84°C
82°C
GPU #2 Fan
Speed (auto)
1040 RPM
1930 RPM
1800 RPM
1770 RPM
SPL@1m
[right side]
23~24 dBA
[24 dBA]
30 dBA
[30~31 dBA]
31~32 dBA
[32 dBA]
35~36 dBA
[36 dBA]
System Power (AC)
167W
521W
518W
519W
CPU fan set to 100% speed.
Ambient temperature: 22°C.

Adding a second video card obviously made the system interior warmer. Sitting idle, the Southbridge heated up by an additional 8°C while the top graphics card ran 6°C hotter. That being said, there was hardly any acoustic difference.

On load with the stock fans at minimum speed, once again, the CPU, Southbridge and GPU took a major thermal hit, while the GPU fans about doubled in speed. While 30 dBA@1m is fairly loud, in this configuration, it's an excellent result. Increasing the intake fans to 800 RPM tacked on another 1~2 dB for an across the board (except for the hard drive) temperature reduction of 2°C. It looks like the high speed stock fans are overpowered even for our CrossFireX test system.


CrossFireX Configuration Comparison (Load)
Case
SilverStone Fortress FT02
SilverStone Fortress FT04
SilverStone Raven RV03
In Win Dragon Rider
Fans Speeds
top at 9V, bottoms @11V/low
fronts at 500 RPM
top @12V, bottoms @9V/low
top, rear, sides @9V, front @5V
CPU Temp
41°C
42°C
41°C
35°C
SB Temp
64°C
69°C
66°C
46°C
HD Temp
29°C
30°C
34°C
31°C
GPU #1 Temp
86°C
88°C
87°C
85°C
GPU #1 Fan
Speed (auto)
1830 RPM
2150 RPM
2140 RPM
1890 RPM
GPU #2 Temp
84°C
84°C
81°C
82°C
GPU #2 Fan
Speed (auto)
1650 RPM
1930 RPM
1820 RPM
1680 RPM
SPL@1m
[right side]
28 dBA
[28~29 dBA]
30 dBA
[30~31 dBA]
31~32 dBA
32 dBA
CPU fan set to 100% speed.
All temperature results adjusted to 22°C ambient.

Again, the FT04 delivered the best cooling:noise ratio with the stock fans running at 500 RPM but in this hotter, dual graphics card environment, performance fell further behind its predecessor. The Southbridge temperature gap narrowed but with higher GPU fan speeds, the overall noise output was 2 dB higher, whether measured from the left or right side of the case.



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