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Cooling System

The cooling system of the EVGA GeForce GTX 560 Ti 2Win consists of two separate heatsinks, one for each GPU, and a plastic casing with fans. The nickel-plated heatsinks look very attractive.

Each heatsink is made of aluminum but has a copper sole. There are two 6mm heat pipes in the heatsinks.

The pipes transfer the heat from the GPU to the additional group of slim fins. The first heatsink has a special contact spot for the NF200 chip. There is thick gray-colored thermal grease between the heatsinks and the GPUs.

The cooler is equipped with three 80mm 11-blade fans.

The two outermost fans, located right above the GPUs, are manufactured by AVC (it’s the DASA0815R2U model with fluid dynamic bearing) whereas the middle one is made by PowerLogic (the PLD08010S12HH model with the same type of bearing).

 

Each fan is connected to a dedicated 4-pin connector on the PCB and supports PWM-based regulation. They have the same speed that varies from 1000 to 4500 RPM (±10 %).

I checked out the card’s temperature while running Aliens vs. Predator (2010) in five cycles at the highest settings (2560x1600, with 16x anisotropic filtering, 4x full-screen antialiasing). I used MSI Afterburner 2.2.0 Beta 9 and GPU-Z 0.5.7 as monitoring tools. This test was carried out with a closed system case at an ambient temperature of 25°C. I didn’t replace the card's default thermal interface material.

Let’s see how efficient EVGA’s original cooler is with its fans being regulated automatically and at their maximum speed:


Auto mode

Max speed

In the automatic regulation mode the GPUs were as hot as 79 and 86°C, the fans rotating at 2520 and 2790 RPM. At the maximum speed of the fans (over 4300 RPM according to my monitoring tools), the GPU temperatures lowered to 68 and 75°C, but the card was too loud. How loud, exactly?

I measured the level of noise using an electronic noise-level meter CENTER-321 in a closed room about 20 sq. meters large. The noise-level meter was set on a tripod at a distance of 15 centimeters from the graphics card which was installed on an open testbed. The mainboard with the graphics card was placed at an edge of a desk on a foam-rubber tray.

The bottom limit of my noise-level meter is 29.8 dBA whereas the subjectively comfortable (not low, but comfortable) level of noise when measured from that distance is about 36 dBA. The speed of the graphics card’s fans was being adjusted by means of a controller that changed the supply voltage in steps of 0.5 V.

Since each fan of EVGA’s cooler is connected to a separate power and monitoring connector, I tested both types (the 80x15mm AVC and the 80x10mm PowerLogic) individually. I’ve included the results of the MSI N580GTX Lightning Xtreme Edition and Sapphire Radeon HD 6970 Dual Fan into the next diagram for the sake of comparison. The vertical dotted lines mark the max speed of the fans in the automatic regulation mode. Here are the results:

As you can see, each fan of the EVGA card works quieter than the coolers of the MSI and Sapphire cards. The three fans of the EVGA GeForce GTX 560 Ti 2Win are going to be 2-4 dBA noisier, however, when working all together. By testing the fans separately we can see the difference between the AVC and PowerLogic fans: the latter is quieter and subjectively seems to be more comfortable than the AVC. I wish the EVGA GeForce GTX 560 Ti 2Win were equipped with PowerLogic fans only as that would make it much quieter.

 
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