Very quiet, low performance – Joe
SUMMARY: An excellent example of the noise/performance tradeoff.
The good guys at Arctic Cooling were nice enough to send their Copper Silent 2 for a test spin. This heatsink features a 3 position switch to power the fan at High, Medium and Low speeds. I used a digital tachometer and measured speeds of 2775, 2195 and 1553 rpm during testing.
The fan is an 80 x 37 mm unit rated at 36 cfm, 24 dBA @ 2800 rpm, 28.5 cfm, 18 dBA @ 2200 rpm and 15.5 cfm, 13 dBA @ 1500 rpm. I found it to vary from very quiet to almost inaudible – I measured noise at High at 50 dBA¹ with a Radio Shack sound meter 8″ from the fan’s intake – I could not get a reading at lower rpms. It’s also safe to use a motherboard fan header – 3.2 watts.
The base is not particularly well finished:
When I ran my nail over it, I could feel ridges. With such a low powered fan, improving the base finish would help performance.
One nice thing about this heatsink – there are four LEDs to light it up:
The Copper Silent 2 was tested on the CPU Die Simulator which gives results that are unaffected by motherboard influences.
|Copper Silent 2, 2775 rpm, 50 dBA¹|
|Copper Silent 2, 2195 rpm, <50 dBA¹|
|Copper Silent 2, 1553 rpm, <50 dBA¹|
C/W = Delta / CPU Watts
Interpreting C/W: For every watt (CPUw) that the CPU
consumes, the HSF will limit the CPU’s temperature rise to (C/W x CPUw)
plus the temperature at the HSF’s fan inlet. For example, at an ambient temp of 25 C, a C/W of 0.25 with a CPU radiating 50 watts means that CPU temp will increase 50 x 0.25 = 12.5 C over ambient temp, or 37.5 C. The lower the C/W, the better.
Die Simulator results place the Copper Silent 2 in the lower rank of heatsinks tested to date (Heatsink Ranking).
Arctic Cooling’s Copper Silent 2 is a low-noise, low-performance choice for Socket A cooling – if noise and un-demanding performance are your thing, then this is one to consider.
Overall, I remind readers there is no such thing as a free lunch – lower fan noise and lower performance go hand-in-hand.
Thanks again to Arctic Cooling for sending this our way.
¹Note that manufacturers measure fan noise usually 3 feet from the fan; I measure noise 8″ from the fan’s intake.