Silverstone's Flagship: Temjin TJ06 PC case

Cases|Damping
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THERMAL & ACOUSTIC TESTING

We won't bore you with pages of benchmark graphs that show this setup to be within 2-3% of any Intel P4-2.8C / 865 chipset system around. That's not the point. Generally, it's a pretty zippy desktop system that should work fine for just about any application. The more important question is how well the case cools the system and how quietly.

Note that with this unusual case, there are so many different ways to configure a system that it is not possible in the context of a review to explore them all. A cpmplete exploration of possibilities will require concerted effort by many experimental users with different combinations of components.

Lab Tools:

  • Enermax UC-A8FATR4 multifunction panel for measurement of temperatures.
  • CPUBurn - CPU stress loader
  • 3DMark03 - Futuremark VGA testing benchmark
  • Custom 4-channel variable DC power supply (made expressly by SPCR's Sean Boyd) for precise control of fan voltages
  • Digital anemometer to measure fan airflow
  • B & K B&K 2203 sound level meter
  • Digital Audio Recording system: Taylor Hohendahl Engineering (THE) KP- 6M Reference Microphone in a suspension shock mount on boom mic stand. Modified Shuttle Zen PC running a P4-2.53 and suspended Samsung 40G 2.5" notebook hard drive, with single channel M-Audio Tampa mic preamp and M-Audio Firewire 410 external digital sound interface feeding the signal from the microphone.

(Please see the article SPCR's Test / Sound Lab: A Short Tour for more details of our testing setup.)


Key SPCR test tools: The THE microphone, the power supply that Sean built, the anemometer and the SLM.

Three temperature sensors from the Enermax multifunction panel were positioned thus:

  • HDD Bay: In the middle of the HDD bay.
  • CASE: In the middle of the motherboard section, about 2" above and behind the fan of the VGA Silencer.
  • CPU: At the edge of the P4-2.8C CPU casing, touching both the casing at the heatsink base. (The CPU temp diode could not be accessed in this motherboard.)

Other conditions:

  • The sound pressure level was measured with sound level meter positioned one meter away from the front bezel.
  • MP3 sound recordings were made with the microphone positioned 3" from the very center of the front bezel, just about in front of the top floppy drive bay. MP3 specs: 96kbps / 16 bit / 44.1kHz sampling
  • Ambient conditions were 18 dBA and 21°C.
  • The system was run for 15~20 minutes between changes before any measurements were recorded.
  • The Arctic Cooling VGA Silencer on the ATI 9800 Pro VGA card was always set on low to minimize its noise contribution. It measures less than 20 dBA/1m at this setting.
System at full load, CPUBurn
Fans
Wind Tunnel
CPU
Case
HDD Bay
SPL*
All 3 fans at 12V
out
52°C
27°C
28°C
34
All 3 fans at 12V
in
46°C
29°C
30°C
34
All 3 fans at 7V
in
49°C
30°C
31°C
26
Both 120mm fans only at 7V
in
50°C
32°C
33°C
22
120mm exhaust fan only at 7V
in
53°C
33°C
33°C
21
120mm exhaust + Nexus 80 intake fans at 7V
in
53°C
30°C
31°C
22
* SPL readings at in dBA at 1 meter
NOTE that all noise readings and recordings include the effect of the Seasonic Super Tornado PSU's 120mm fan and a hard mounted Seagate 7200.7 hard drive. Both are very quiet, but they do add a layer of background noise, especially the hard drive, whose vibrations translate into a low level, low frequency rumbling.

1) All three stock fans at 12V without the wind tunnel

Most SPCR readers would not use the Silverstone TJ06 this way, but running all the fans at 12V establishes a reference starting point. As the 34 dBA/1m SPL reading and the MP3 recording below indicate, it's not quiet, but the overall noise signature with the selected components is not bad. The temperatures are all very low for system under full load drawing over 140W DC. Although the CPU temperature is probably a few degrees lower than it would be directly from the thermal diode in the die, the numbers are very good, especially when you consider that the closest fan is at least an inch away. The temperatures are all quite low for a system of these components.

Silverstone Temjin TJ06 case in P4-2.8C test system with all fans at 12V

2) All three stock fans at 12V with the wind tunnel

There's little question that the combination of the 120mm fans and the Silverstone NT01 heatsink in the wind tunnel of the TJ01 case is capable of very good cooling. The substantial 6°C drop in CPU temperature shows much more effective cooling airflow across the CPU area. The power supply components around the CPU socket benefit from this cooling airflow as well. The only price is a very slight 1~2°C increase in temperature in the rest of the case, probably due to the intake airflow being restricted to just the 80mm fan.

At first, it seemed as if there was a bit more low frequency noise with the duct in place, but careful back and forth listening revealed that the difference is very minute, and probably only there at the highest fan speed / noise level. The air in any enclosed space has a resonance and that resonance can accentuate lower frequency noise from the fans and hard drives, but the effect was minimal in this case. No sound recording is needed for this configuration because it would sound just like the one above.

3) All three stock fans at 7V with the wind tunnel

CPU temperature rose a few degrees from the 12V level, as did the other temps, but overall, the difference was small. The noise change was very substantial. Now down to the mid-20s in dBA/1m, it's at a level that would be acceptable for a lot of users. However, there is a buzziness that is coming entirely from the 80mm fan. Perhaps you can hear that in the MP3 below.

Silverstone Temjin TJ06 case in P4-2.8C test system with all fans at 7V

4) Only 120mm fans at 7V, 80mm stock fan removed

The sound is now very smooth and quiet. 22 dBA/1m is extremely good for a 80W CPU system. (It's certainly on par with my own PCs.) The CPU temp is hardly affected, but the case and HDD bay temps rise, as expected. The rise is much less than it could have been because the Seasonic PSU's 120mm fan does pull some air from that area and the Arctic Cooling VGA Silencer also blows some heat out.

Silverstone Temjin TJ06 case in P4-2.8C test system with 120mm fans only at 7V

5) Only the 120mm exhaust fan at 7V, both front fans removed

This is the quietest config, but not by much, and the cooling performance is probably close to borderline for hotter weather. It was an experiment that just had to be done.

Silverstone Temjin TJ06 case in P4-2.8C test system with single exhaust 120mm fan at 7V

5) 120mm exhaust fan plus a Nexus 80 intake fan, both at 7V

This is probably a bit quieter than the two 120mm fans at 7V, but it is hard to tell. Cooling performance is pretty close to all three stock fans at 7V.

Silverstone Temjin TJ06 case in P4-2.8C test system with exhaust 120mm and intake Nexus 80 at 7V

Overall, the cooling performance of the case, the NT01 heatsink and the wind tunnel is impressive. So is the fact that it can do it very quietly with stock fans. The 120mm fans are very good, although the 80mm fan is a non-starter: That buzzing kills it for most listeners. But quiet replacement 80mm fans are not difficult to get. A Panaflo 80L undervolted to 7V would be an easy recommendation.

Here is measured test data on the stock fans, and some sound recordings.

Silverstone Temjin TJ06 120mm
(Everflow R121225SL)
12V
47 cfm
23 dBA/1m
7V
24 cfm
18 dBA/1m
5V
14 cfm
17 dBA/1m
Silverstone Temjin TJ06 80mm
(Everflow F128025SL)
12V
30 cfm
27 dBA/1m
7V
15 cfm
19 dBA/1m
5V
9 cfm
18 dBA/1m

The 120mm is very smooth and quiet, pretty close to the Nexus 120, although the bearings feel a bit sloppier. It has higher maximum airflow than the Nexus, and at the same airflow, has very similar acoustic performance. The 80mm fan is another story altogether. It buzzes badly at any speed and is easily outperformed by many 80mm fans.



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