Let's see how good of a cooler the ICEBERQ 5 really is. First, let's start with the stock cooler temperature.

Stock fansink idle temperature

ATITool 0.24 reports 51°C as the lowest temperature the card drops to during idle mode. Firing up the 3D View of ATITool, we let the card heat up while logging the temperature with RivaTuner.

Be default, the stock ATI fan has it's duty cycle automatically adjusted to reduce noise when full speed is not needed. The peak temperature we got was around 85°, but as soon as the fan reach maximum RPMs, the temperature dropped to 76°.

Stock fansink full load temperature

We then installed the ICEBERQ5 and ran the same tests. Note that we let the ICEBERQ 5 run at maximum RPMs at all times since we could not hear any noise from the card. The idle temperature was now reported as 42°C, 9 degrees lower than with the stock fansink.

ICEBERQ 5 idle temperature

Once again running ATITool's 3D View to heat up the card, we witnessed the temperature rising up but much slower this time. The temperature finally stabilized at around 75°.

ICEBERQ 5 full load temperature