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Dynatron W3 for Ampere AltraMax

Ampere AltraMax is a powerful server CPU with numerous cores. However, it lacks solutions for end users, with the ASRock Rack motherboard being the only available option. The original package includes a heatsink but no CPU fan, necessitating alternative heat dissipation methods. Currently, there are some tower fans available, and I have acquired a Dynatron W3 fan (from newegg) for preliminary testing.

The Dynatron W3 package comes in a standard case.

includes a tower heatsink, one 120mm 4-pin fan, and thermal paste.

The base is not entirely copper, and its area seems somewhat small

other parts

While no documentation is provided, installation is straightforward for those familiar with DIY PC building

There is a gap between the DDR slots and the CPU fan, but larger DIMMs might require disassembling and reinstalling the tower fan.

In a preliminary test using stress-ng with 128 threads on an AltraMax 128-30 CPU and ASRock Rack ALTRAD8UD-1L2T.

Test command is

stress-ng --cpu 128 --vm 128 --vm-bytes 128M --timeout 180s --metrics-brief

the fan operated at 1400 RPM and maintained a quiet profile. The CPU temperature reached 64°C, staying below 70°C, with power consumption around 178W.

This performance suggests the tower fan is suitable for general purposes.

Notice: The CPU’s TDP is rated at 250W, this maximum power draw is only achievable under full system stress, such as utilizing all 8 DRAM controllers and all PCIe root controllers. Therefore, this figure should be considered as a reference rather than a precise measurement.

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