SUMMARY:
The fan is an Everflow Model #R127015DU – a 70 x 15mm unit rated at 26 cfm @ 4200 rpm. I found it to be tolerably quiet – I measured its noise at 62 dBA with a Radio Shack sound meter 8″ from the fan’s intake, substantially less than a Delta 38 (about 69 dBA). It’s also safe to use a motherboard fan header.
In summary, a fairly conventional aluminum extrusion heatsink with a very secure and easy to use clip.
The IceStream was first tested on the CPU Die Simulator which gives results that are unaffected by motherboard influences. I then tested it on a Lucky Star P4A845D with a modified P4 1500 to read CPU case temps, as an example of what users might see on their systems.
| Heatsink | Die Temp | Ambient Temp | Delta | C/W |
| IceStream | 53.7 C | 22.4 C | 31.3 C | 0.43 |
| CPU/Motherboard | CPU Case Temp | Ambient Temp | Delta | C/W | MBM Temp |
| P4 1500, Lucky Star P4A845D | 36.8 C | 23.5 C | 13.3 | 0.23 | 31 C |
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.
Motherboard results results place the IceStream in the mid rank of heatsinks (Heatsink Ranking).
Thanks again to Crazy PC for sending this our way.
Discussion