With most of these little nifty units adding a 2nd fan improves the performance quite nicely. Time to put the theory to the test. Time to cool down that Gulftown hexacore again at 4.2Ghz 1.4Vcore. We picked the S1366 testbed as it was our hottest platform.

Instead of just adding another fan we picked the two fans from the H70, though limiting them at 7V ( +/- 1600rpm ). This to still keep a good noise/performance balance.

Now we are talking business, gaining 5°C over the stock unit. And all this not at the cost of extra noise. I honestly find the fan of the H60 not as quiet as it claims to be. When it's being regulated by the PWM controller to spin at full rpm it makes this weird pitched sound. If you lower it to 1400rpm it's generated noise is far more acceptable.

Now Corsair always wants the user to mount the fan in this particular way  : sucking in ambient air. This achieves better cooling as the ambient room temps are normally lower than the case's interior temperatures. Though what happens if we reverse the stock fan and doing the same for the optional dual fan setup.

Reversing the stock fan is not such a good idea, loosing over 4°C in performance. With the dual fan setup the difference is negligable (+/- 1.3°C). Keep in mind though that my case setup has got 3 case fans to keep the case interior pretty ventilated. Creating a decent airflow is critical for these units.

Noise tests were a bit of a surprise to me as Corsair claims the fan to be a 30.2 dBA one. Yet once it spins up to max rpm ( according AIDA64 1762rpm) it makes a weird pitched noise. I was encoding some DVDs and the spin up and down was clearly distinguishable from the ambient noise. ( take note that the ambient noise is already with my dBa meter at 37.5dBa ) Don't overexagerate the below charted readouts. The H60 is audible, but not annoying like the H7O's fans at full blast...

Pump noise was measured with only the cooling pump hooked up to the PSU. Nothing else besides the PSU fan spinning. The noise was measured at approx 1cm from the pump.

First time you hook up the pump you will hear the air and fluid mixing up. After a while, it all settles down to become a vey silent operating pump.

H60 on the left, H70 on the right...

Wrap up time...