Extreme Gamer 22dBA PC by EndPCNoise

SPCR Certified Silent PCs
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ACOUSTIC & THERMAL CHARACTERISTICS

Many tools were used to analyze the system:

Software:

CPUBurn (CPU stress test)
Prime 95 (CPU & memory stress test)
ATITool (GPU stress test and temperature monitoring)
Speedfan (hardware monitoring)
3DMark06 (video performance benchmark)
PCMark05 (system performance benchmark)
Core Temp (CPU tmperature monitoring)
Throttle Watch (monitor CPU throttling due to overheating)

Hardware:

BenQ FP991 19" LCD monitor
Seasonic Power Angel AC power meter
Brüel & Kjaer Type 2203 Sound Level Meter

I measured temperature, noise and AC power draw under various loads in ambient conditions of ~18 dBA and 21°C over a period of several days. Some of the stress tests were run continuously for more than 12 hours.

Activity
CPU
VGA
HDD
SPL
dBA@1m
AC Power
off
-
-
-
-
3.4W
sleep
-
-
-
6.6W
power saver*
36 / 34°C
61°C
42°C
22
176W
idle
38/ 36°C
61°C
42°C
22
184W
full load
(ATI Tool and Prime95 x4)
51 / 45°C
84°C
42°C
22
314W
† Core Temp showed the maximum allowable T-junction temperature of the Intel Q6600 CPU to be 100°C. Two of the always lagged by 6-7°C. There was some 50°C headroom.
* A power saving mode in Vista that dynamically controls CPU Vcore.

The combination of ATI Tool stressing the 8800GTX video card and Prime95 loading all four cores of the Intel Q6600 led to the highest measured power demand of any of the stress tests. Thermally, the system took this in stride, not even breaking a sweat during a 12 hour continuous session at this load. There was no misbehavior of any kind by the video card, and no errors in Prime95. This continuous load is more stressful thermally than playing games, where there are always peaks and valleys in power demand. During a 2 hour continuous loop of all the tests in 3DMark06, the highest VGA temperature peak recorded was 68°C, and it more typically ran in the low 60s; the CPU temperature didn't exceed 50°C

Most importantly, the extremely low 22 dBA@1m acoustics of the system never really changed. The fans and the hard drive combine to make a soft wooshing that can be heard when you are very close. Muted clicking noise is audible when the hard drive is seeking. When the system is placed under the desk as is the norm for large tower systems, whatever noise the system makes becomes basically inaudible until you get on your hands and knees in front of the machine.

Just how quiet is it? Like EPCN's SPCR Model One, it is quieter than the 17" iMac and the 24" iMac we reviewed. Those iMacs happen to be the quietest mass production computers we've heard. Model 22DBA has slightly nicer acoustics than the iMacs, probably because of its larger fans, which tend to have a softer broadband sound with less treble. The AcoustiPack Delux V2 material lining the internal panels help reduce standing waves and tonal aspects to make the overall sound signature quite "benign".

The 850W Zalman PSU may seem like overkill for a system that draws only 314W maximum. However, very brief peaks are known to jump 25% higher, and the extra headroom also allows much more powerful configurations (such as the recently released nVidia 9800GX2, rated for 197W max) for truly extreme gamers. The main reason for this PSU choice, however, is that it is the quietest EPCN has found among high power units: It's one that rarely if ever ramps up its fan, due to its high efficiency, heatpipe technology and well-behaved 140mm fan cooling fan.

EndPCNoise offers 7200 rpm performance notebook drive options for even lower noise and power, as well as Solid State Drive, the ultimate in low power and performance, especially random access. The WD Raptor 10,000 rpm drives are also available as options. They offer the best seek time of all the moving HDDs, but at the expense of much louder seek noise. I did try a version with a Raptor 150GB, and it can push the peak noise up to around 28 dBA@1m. I personally don't recommend it, as the noise price seems too high. The standard WD SE16 640, with its dual high density platters, provides excellent performance, whose throughput probably exceeds that of the Raptors.

Within the next few weeks, however, a new 10,000 rpm drive from WD, the VelociRaptor, will soon be available as an option. This unique new 2.5" SATA drive offers better performance than the current Raptor while reducing both heat and noise.

Finally, the ambient temperature was raised to 30°C using a 900W radiant heater positioned directly in front of the system. The results were very slightly higher CPU and VGA temperatures, but no change in overall noise. It's possible that higher temperatures could make the PSU fan speed up, but probably only if you've opted for a dual-video card and multi-HDD setup that pulls at least 150W more than the test system. If the air temperature was that hot, you probably would not choose to be at your computer for any length of time anyway.

You can probably imagine the kind of performance that an Intel Q6600 CPU with 4GB of RAM, an nVidia 8800GTX video card and a fast HDD provides. I don't think I've seen the OS or programs load so fast since the days of DOS. The game sequences in 3DMark were delivered with great speed, smoothness and beauty. This is one helova fast machine.

Summary

The SPCR Extreme Gamer 22DBA by EndPCNoise is a high performance gaming PC that runs so quietly that neither your nor your opponents will hear you coming, no matter how intense the action gets.

EndPCNoise order page for SPCR Extreme Gamer 22DBA

EndPCNoise page for SPCR Model Eleven Media Center PC

EndPCNoise page for SPCR Model One PC



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