Page 3: Gigabyte GeForce GTX 780 WindForce 3X OC
We now come to the Gigabyte GeForce GTX 780 WindForce 3X OC. It is one of two cards provided by the manufacturer. The second one uses NVIDIA's reference cooler.
Gigabyte has a less aggressive approach than EVGA. They decided on a base clock of 954 MHz, which corresponds to 10.5 percent of overclocking. The boost clock is raised by 11.5 percent to 1006 MHz. RAM uses the usual 1502 MHz as clock speed. Gigabyte's implementation does not end at the promised 1006 MHz, with the card reaching up to 1058 MHz at a voltage between 1.03 and 1.16 volts.
Details of the Testing Sample
|Clock rates (2D/3D)||Chip||324 MHz / 954 MHz|
|Memory||162 MHz / 1502 MHz|
|Manufacturer, type||Samsung GDDR5|
|Memory Interface||384 bit|
|Layout||Length (incl. slot panel)||26.5 cm|
|Length (including cool)||26.9 cm|
|Width (incl. cool)||12.9 cm|
|Height (including cool)||3.4 cm (Dual-Slot)|
|Power Supply||1x 8-pin
|Power||6 +2 phases|
|Heatsink||6x copper heatpipes
nickel-plated aluminum fins
|Fan||3x 75-mm axial|
|Extent of Delivery||
1x Quick Start Guide
Now let's look closer at our test candidate.
Gigabyte uses the well-known Wind Force 3X cooler for their overclocked model of the GeForce GTX 780. It is characterized by three 75 mm fans and a meticulously designed arrangement of heatpipes and heatsinks. However, a small flaw becomes evident quickly: the cooler protrudes both in height and length over the PCB, which in normal PC cases should not be a problem.
Looking at the back of the PCB, we see the protruding radiator. Other than that, Gigabyte also uses the PCBs of the NVIDIA reference version and therefore has no recognizable special features.
Looking through the transparent fan blades, the six copper heat pipes can be seen. They should take the heat of the GPU and transport it into the two heatsinks. We will see later in the measurements sections how well this reflects on temperature and noise level.
The additional 6-pin and 8-pin power supplies can be found at the rear end of the card. The first cards manufactured by Gigabyte have a small problem in this respect, however. The power plugs can only be connected applying a bit of force, since the radiator does not leave enough space on the connections. According to Gigabyte, the cards now delivered to the market no longer have this problem.
Using the two SLI connections, the Gigabyte GeForce GTX 780 Windforce 3X OC can be operated in an SLI system. Along with the cooler, Gigabyte designed the card for use in dual-slot setup, which should allow for easy SLI operation on all motherboards.
The bottom plate of the cooler is made of copper and is meant to lead the waste heat directly to the heatpipes. The memory chips and some components of the power supply are also included in this approach.
On the slot panel, we find the mandatory connections: two dual-link DVI (DVI-I and DVI-D), HDMI 1.4a and DisplayPort 1.2.
We found no special features in the card itself, so we focus on the cooler. It uses a copper base plate, placed on the GPU and the voltage transformers. The five heat pipes lead heat to the rear part of the cooler.
Gigabyte uses several layers, through which the heat is to be dissipated. The GPU is covered by a copper plate, while memory chips are covered with the aluminum cooler. Underneath the GPU, the five heat pipes go directly through the base plate.