Antec Twelve Hundred Gaming Case

Cases|Damping
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Test Results - Configuration #1 (HD 4870)


Case with test system installed (HD 4870).

System Measurements (HD 4870)
Active System Fans
none
front (center)
top, rears
top, rears, front (center)
top, rears, side
SPL@1m
27 dBA
26 dBA
25~26 dBA
27 dBA
28 dBA
CPU Temp
60°C
55°C
48°C
46°C
46°C
SB Temp
57°C
53°C
51°C
49°C
51°C
HD Temp
35°C
29°C
33°C
29°C
31°C
GPU Temp
88°C
84°C
87°C
84°C
85°C
GPU Fan
Speed
2170 RPM
1680 RPM
1760 RPM
1580 RPM
1760 RPM
Testing conducting with both CPU + GPU load applied.
CPU fan set to 100% speed, active system fans set to Low or min. speed.
Ambient temperature: 24°C. AC power draw: 330~333W.

The system with no active system fans ran fairly hot with the GPU fan spinning at 2170 RPM just to keep the GPU at 88°C. Turning on the center front fan at its minimum speed resulted in temperature improvements across the board, 4~5°C on average. Once the various component temperatures stabilized, the overall noise level improved by 1 dB overall because the extra airflow allowed the HD 4870 stock heatsink to slow by 500 RPM.

A tradeoff resulted when we shut off the front fan and turned on the top and rear fans set to Low --- the CPU and southbridge ran cooler while the video card and hard drive ran warmer. This configuration was slightly quieter as the front fan generates more noise than all three fans at the back combined.

To test the effectiveness of the side fan mount, we installed a spare TriCool there and tested it against the center front fan. The rear and top fans were set to Low. The front fan produced better results, both acoustically and thermally. It generated 1 dBA less noise, and delivered better southbridge, hard drive and GPU temperatures. The ATI stock cooler, encapsulated in a plastic housing really has no use for airflow blowing from the side. Perhaps it would do better with a more open third party heatsink. The front intake, despite being much further away, had a greater impact.


The system measured 27 dBA@1m at full load with the top, rear, and front (center) fans on Low.

The overall acoustics of all the configurations tested could be described as loud, but with a smooth character. The noise was mostly broadband, lacking tonality, whining, and vibration-induced effects. It was fairly impressive for a gaming machine.

Comparisons

The Twelve Hundred's performance was compared with several other cases that were tested with the same components, except for the power supply.

HD 4870 Configuration Comparison (Load)
Case
Silverstone Fortress FT01
Sonata Elite
Nine Hundred Two
Twelve Hundred*
Active System Fans
6V (all fans)
rear @ low
rear, front @ low
top, rears @ low
Noise Level
25~26 dBA
25~26 dBA
27~28 dBA
25~26 dBA
CPU Temp
54°C
55°C
49°C
46°C
SB Temp
60°C
53°C
50°C
49°C
HD Temp
n/a
32°C
31°C
31°C
GPU Temp
82°C
88°C
81°C
85°C
GPU Fan
Speed
n/a
1980 RPM
1860 RPM
1760 RPM
CPU fan set to 100% speed, active fans set to Low or min. speed.
Ambient temperature: 22°C (results adjusted accordingly).
*Twelve Hundred tested with Antec CP-850, others with Cooler Master Silent Pro M700W.

Whether due to the increased case volume, or the Antec CP-850 power supply, the Twelve Hundred posted a small win over the Nine Hundred Two in CPU and southbridge temperatures, and did so with 2 dBA less noise. Our GPU temperature for the 902 was higher, but that result is a bit of an albatross as it was tested on a day with an unusually high ambient temperature so the stock heatsink ramped up to compensate. We adjust temperature recordings to simulate the same ambient temperature and for the most part it works pretty well as typically the adjustment is only 1-2°C so the GPU fan speed differences are usually minimal. Our guess is that the GPU temperature difference would likely be nil on a level playing field.



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