Antec Twelve Hundred Gaming Case

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Test Results - Configuration #2 (CrossFireX)


Case with test system installed (2 x HD 4870 in CrossFireX).

System Measurements (CrossFireX)
Active System Fans
top, rears
top, rears, front (center)
top, rears, side, front (center)
Noise
32 dBA
31~32 dBA
32 dBA
CPU Temp
49°C
48°C
46°C
SB Temp
64°C
63°C
62°C
HD Temp
33°C
29°C
28°C
GPU #1 Temp
91°C
87°C
88°C
GPU #1 Fan
Speed
2325 RPM
2110 RPM
2290 RPM
GPU #2 Temp
86°C
84°C
83°C
GPU #2 Fan
Speed
1960 RPM
1910 RPM
1850 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: 531~537W.

The 5 fans we had been testing on Low seem to be a good match for our CrossFireX configuration as the noise level remained effectively the same whether 3, 4, or 5 of the fans were turned on. We decided not to crank any of the fans to Medium as the various temperatures were good enough and 31~32 dBA was already too loud.

Again, turning on the front fan resulted in a healthy improvement to hard drive and GPU temperature and in fact allowed the GPU fan to spin 200 RPM slower. The addition of the side fan seemed to help the CPU temperature more than anything, but only slightly. It remained mostly ineffective as it did in our single video card configuration.

Comparisons

As before, the Twelve Hundred's performance was compared with several other cases that were tested with the same components, except for the power supply. Silverstone's Raven got added to the mix as it was tested with 4870s in CrossFireX, while the Silverstone Fortress FT01 was omitted because it was only tested with one 4870.

CrossFireX Configuration Comparison (Load)
Case
Silverstone Raven
P183*
Nine Hundred Two
Twelve Hundred*
Active System Fans
CPU + Sys
Fans at full Speed
rear, front
rear, front
top, rears
top, rears, front, side
Noise Level
29 dBA
35 dBA
38 dBA
32 dBA
31~32 dBA
CPU Temp
56°C
58°C
53°C
49°C
46°C
SB Temp
60°C
69°C
64°C
64°C
61°C
HD Temp
30°C
39°C
31°C
33°C
29°C
GPU #1
86°C
99°C
93°C
91°C
87°C
GPU #1 Fan
2060 RPM
3030 RPM
2910 RPM
2325 RPM
2110 RPM
GPU #2
78°C†
89°C
85°C
86°C
84°C
GPU #2 Fan
920 RPM†
2400 RPM
2440 RPM
1960 RPM
1910 RPM
CPU fan set to 100% speed, active system fans set to Low or min. speed.
Ambient temperature: 22°C (results adjusted accordingly).
*P183 & Twelve Hundred tested with Antec CP-850; Nine Hundred Two and Raven with Cooler Master Silent Pro M700W.
†This video card was not at 100% load in the Raven test.

Our CrossFireX system configuration illustrates the superiority of the Twelve Hundred with hotter components over the Nine Hundred Two and P183. Usually when we add a second HD 4870, the SPL sky rockets to the level of a blow dryer, but in the 1200, the GPU fans spun at more reasonable levels. Not so in the Twelve Hundred, which kept the GPU fans running 900~1000 RPM slower respectively compared to the other Antec cases. The CPU temperature was also lower by a very substantial margin, and most of the other component temperatures were at least a bit lower

Interestingly, the Silverstone Raven edged the Twelve Hundred in overall noise, due mostly to better cooling for the second GPU, which ran at half the speed in the Raven. However, this GPU in the Raven test was not at 100%, as the total system power measured at the AC outlet was nearly a 100W lower than the >530W in later 4870s CrossFireX tests. We expect that with full 100% CrossFireX load, the noise level of the Silverstone Raven would likely have been similar to the 31-32 dBA of the Nine Hundred.

It should also be noted that the sound of the fans in the Raven was judged to be very smooth, better than the Antec's fans. While all of the other parameters for these two cases were close enough to call them ties, the CPU ran 10°C cooler in the Twelve Hundred. Still, it can be argued that 56°C in the Raven is a perfectly safe temperature for the CPU.



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