Gigabyte GeForce GTX 770 (GV-N770OC-2GD) vs. ASUS Matrix Platinum (R9280X-P-3GD5) Video Card Review
The Gigabyte GV-N770OC-2GD (part 2)
Contents
The Gigabyte GV-N770OC-2GD uses a “Windforce” cooler with three 80 mm fan. It has two 8 mm and four 6 mm heatpipes, and touches the memory chips and the voltage regulator transistors. According to Gigabyte, this cooler can dissipate up to 450 W.
Figure 5: Cooler removed
The video card uses a voltage regulator with eight phases for the GPU and two phases for the memory chips. The voltage regulator circuit uses a digital design and is controlled by an NCP4208 chip. All capacitors are solid.
Figure 6: voltage regulator
Figure 7: voltage regulator
The reviewed video card uses eight Samsung K4G20325FD-FC28 GDDR5 chips, each one storing 2 Gbits of data, comprising the 2 GiB of memory available on this video card. These chips can run up to 7 GHz. On this video card, they are accessed at 7 GHz, which means there is no margin for increasing the memory clock within the characteristics of the chips. You can, however, increase the memory clock beyond their limits.
Figure 8: memory chips