The Radeon R9 Fury X - part 2

Figure 16 shows the Radeon Fury X with its cooler removed. It is a liquid cooling block with copper base and embedded pump. The cooler structure is a big metal plate that keeps contact to the voltage regulator circuit transistors, and is connected to the block through a heatpipe. So, the liquid cooling system refrigerates not only the GPU, but all the “hot parts” of the video card.

Video Card ReviewFigure 16: the Radeon Fury X with the cooler removed.

In Figure 17, you can see the card. At first sight, it looks like there are no memory chips. Actually, the video card memory is located where the four small chips together to the main graphics chip.

Video Card ReviewFigure 17: the Radeon R9 Fury X without its cooler

Figure 18 shows the Fiji GPU. The biggest innovation on the R9 Fury X is the usage of HBM (High Bandwidth Memory). This memory uses a system where the memory chips are stacked and mounted on the same substrate as the graphics chip. With this system, it is possible to create a wider bus, when compared to traditional graphics card, where GDDR5 (or DDR3) memory chips are separated and connected to the GPU by PCB tracks. According to AMD, this standard also uses less power than the traditional DDR3 and GDDR5.

In the Fury X, the memory bus uses 4,096 bits. As this video memory works with 1 GHz clock, the available bandwidth is 512 GiB/s. The Radeon R9 Fury X comes with 4 GiB of HBM video memory.

The GPU has 4,096 processing cores, divided in 64 computing units.

Video Card ReviewFigure 18: graphics chip with the four HBM chips

Figure 19 shows the voltage regulator of the R9 Fury X, which uses six phases for the GPU.

Video Card ReviewFigure 19: voltage regulator circuit of the Radeon R9 Fury X