Zalman 9500AT Intel 775 CPU Cooler

by Rob Williams on May 22, 2006 in Cooling

Looking for the ultimate air cooling solution for your Intel 775? The Zalman 9500AT may be up your alley, but may prove a little pricey for your liking. Installation proved a little problematic, but the cooling ability is evident.

Page 4 – Testing

I no longer have the stock cooler that came with my 820 D, due to it being an absolute pain to re-install, so I will be comparing the 9500AT to the Corsair N500 Water Cooling. Granted, this is not -that- fair of a comparison, but it will be interesting to see how well Zalman’s air solution compares to the the water cooling.

I tested the cooler using my CPU at 2.8GHz, 3.36GHz and 3.92GHz. At each setting, a loop of 2 3D Mark ’01 runs were executed. Following that test, 3D Mark ’06 was also looped twice. Lastly, Super Pi 1.5 Mod was run, using the 8 Million setting. All figures were grabbed with Everest 2.8, which does a great job of logging temps to an easy to read HTML file.

    Test System

  • CPU: Pentium D 820 @ 2.8GHz
  • Motherboard: ASUS P5WD2-E Premium w/ 401 BIOS
  • Memory: Corsair 2GB 6400PRO
  • Video: BFG 6800GT OC 256MB PCI-E
  • Sound: Realtek HD Audio
  • Storage: WD 200GB 7200 8MB
  • Odds and Ends: D-Link WiFi PCI Card
  • Etcetera: Windows XP Professional SP2, Windows x64 Professional SP1, NVIDIA 81.98 Drivers

The directed way to use the Zalman, as told by Zalman, is to have the 9500AT facing in such a way that will blow hot air to the -back- of your PC. Presumably, you should have a 120mm case fan installed in the back that’s used to export hot air. This way, the Zalman will blow air towards it, and the fan will get rid of it quickly. I tested the cooler both ways, and the ‘opposite’ tag denotes the ‘incorrect’ placement. I did it both ways primarily to see how large the differences would be.

Note: During testing of the Corsair Nautilus, the room temperature was 80°F. During the testing of the 9500AT, the room stayed at a constant 82°F.

Sadly, I had forgotten to test the Nautilus at higher CPU clocks prior to un-installing it, which is why only the 2.8GHz figure is displayed. Comparing 2.8GHz between the two though, the 9500AT came -very- close to the same average. Not bad for comparing an air cooler to a water cooling rig though. But, to be fair, when the Nautilus was installed, the airflow was not great. I made sure the airflow was superb inside the case prior to installing the 9500AT. Because of the cooler being so huge, I did not want a bunch of cords to get intertwined with it’s fins.

At higher overclock’s though, the temps were getting very high. Especially for 3.92GHz… 73°C is not exactly in the comfort zone. The max temp I have seen with the Nautilus has been 60°, but it would be even lower if the ambient room temp wasn’t so high.

For those interested, here are the motherboard temps during testing:

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Rob Williams

Rob founded Techgage in 2005 to be an 'Advocate of the consumer', focusing on fair reviews and keeping people apprised of news in the tech world. Catering to both enthusiasts and businesses alike; from desktop gaming to professional workstations, and all the supporting software.

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