Zalman 9500 LED Review - So how good is it?
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Noise wise, I have to say the fan isn't great. It's certainly quiet, much more so than Intel 's stock fans, but it's not "silent." There's little turbulence from the fins; it's all in the bearings. Turning down the supply with the FANMATE helps a lot, but on full the fan is just a beast. That being said, the knock on effect of the better cooling is that I don't have to run my case fans at full speed, which greatly reduces the overall noise.
Now on to the cooling:
Specifications:
Intel P4 Prescott 3.0GHz (Hyper Threading) |
ASUS P4P800-E Deluxe |
Tegan Easycon 430w (120mm fan) |
Jeantech 'Phong' case. 2x 120mm case fans, 1x 80mm side vent (fanless) |
Tests:
Idle: | Idle after boot, average temperature over 15 mins. |
Load: | http://folding.stanford.edu/ running under full load, average temperature over 15 mins. |
I tested my old stock Intel heatsink/fan (with a lapped base + Arctic Silver 5, and a duct from the side) against the 9500, without lapping (it really doesn't need it) and without the duct, but the vent wasn't covered up.

It's not much of a competition...
I recorded the average temperature throughout each test using ASUS PC-Probe, and used my trusty multi-meter and thermocouple to check the temps and work out how much the motherboard was out by.
My case fans were running at full speed, and I connected the 9500 directly to the motherboard, bypassing the FANMATE controller. None of the BIOS options were changed, so the board should have treated the fans exactly the same.
| Stock | 9500 |
Idle: | 40°c | 37°c |
Load: | 55°c | 45°c |
The ambient temperature was 19°c, which seems about right (Britain's a cool place). I worked out that on average the motherboard was reading the CPU temperature as 9°c above, which means that over all the Zalman 9500 is able to cool my PrescHOT to around 26°c idle and 34°c load; that's only a 15° rise above ambient! I'm also able to turn my case fans right down but still keep the same temperatures. This is brilliant!
Next: The verdict >>
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