Speeze EasyStream ™ 9T236B1M3

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Quiet with sedate peformance – for P4 — Joe

SUMMARY: Conventional aluminum extrusion heatsink with quiet fan, sedate performance.


Size: 78×90×47mm high; Fan: 21.7 cfm @ 3500 rpm; Lever Arm halfway closed.

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.


Die Temp
Ambient Temp
EasyStream™ 3350 rpm 27dBA
55.5 C
20.5 C
35.0 C
EasyStream™ 3950 rpm 29dBA
54.3 C
20.5 C
33.8 C
EasyStream™ 4400 rpm 31dBA
53.0 C
20.5 C
32.5 C

TEST RESULTS – Motherboard

CPU Case Temp

Ambient Temp




P4 1500/Lucky Star 4A845D

35.6 C

21.3 C



30¹ C

¹Motherboard Monitor

Delta = CPU temp – Ambient Temp
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.

Email Joe


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