Quiet with sedate peformance – for P4 — Joe
SUMMARY: Conventional aluminum extrusion heatsink with quiet fan, sedate performance.
The good guys at Speeze were nice enough to send over a sample of their P4 heatsink, the EasyStream™ 9T236B1M3. This is an aluminum extrusion unit with a fairly quiet fan.
The base
was nicely finished – there were very slight polishing marks but barely discernible to the touch.
The fan is an Fanner Tech # FD07015B1M – a 70 x 15mm unit rated at 21.7 cfm @ 3500 rpm. I found it to be quiet – I measured its noise at 29 dBA @ 3950 rpm. It’s also safe to use a motherboard fan header – it draws 2.4 watts at 12 volts.
I found the clip about the best I ever used on a P4 – mounting and dismounting with this design was a breeze. The top lever articulates four arms which easily lock into a standard P4 bracket – a very nice implementation. The picture shows the lever arm halfway closed.
In summary, a fairly conventional aluminum extrusion heatsink with a very secure, easy to use clip for P4 use.
The EasyStream™ was first tested on the CPU Die Simulator which gives results that are unaffected by motherboard influences. I then tested it on an Lucky Star 4A845D 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 |
| EasyStream™ 3350 rpm 27dBA | 55.5 C | 20.5 C | 35.0 C | 0.47 |
| EasyStream™ 3950 rpm 29dBA | 54.3 C | 20.5 C | 33.8 C | 0.45 |
| EasyStream™ 4400 rpm 31dBA | 53.0 C | 20.5 C | 32.5 C | 0.43 |
| CPU/Motherboard | CPU Case Temp | Ambient Temp | Delta | C/W | CPU MBM |
| P4 1500/Lucky Star 4A845D | 35.6 C | 21.3 C | 14.3 | 0.25 | 30¹ 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.
Die Simulator results place the EasyStream™ in the lower rank of heatsinks (Heatsink Ranking).
Quiet means low airflow – the tradeoff is performance vs noise, and the EasyStream™ is one for consumers more interested in noise rather than all-out cooling performance.
Thanks again to Speeze for sending this our way.
Be the first to comment