The EVGA GeForce GTX 680 (Cont’d)
The GeForce GTX 680 uses a cooler with a 63 mm radial fan, located beside the heatsink. The heatsink uses aluminum fins and a copper base.
In Figure 6, you can see the video card with its cooler removed. It uses a voltage regulator with four phases for the GPU and two phases for the memory chips. The voltage regulator circuit uses a digital design and is controlled by an RT8802A chip. All coils use ferrite cores and all capacitors are solid.
The reviewed video card uses eight Hynix H5GQ2H24MFR-R0C GDDR5 chips, each one storing 2 Gbit of data, making the 2 GB of memory available on this video card. Each chip is connected to the GPU through a 32-bit lane, creating the 256-bit datapath that is available. These chips can run u
p to 6 GHz. On this video card, they are accessed at 6,008 MHz, which is already a tiny bit above their labeled clock rate. Of course, you can always try to push the memory clock above its specs.
Before seeing the performance results, let’s recap the main features of this video card.