Radeon R9 390X 8GB – Myth or Reality?

Radeon R9 390X 8GB - Myth or Reality?

While NVIDIA releases GeForce TITAN X, equipped with huge even by today’s standards video memory capacity is 12 GB, we know that the future solutions from AMD Fiji XT will be satisfied with 4 gigabytes of memory. However, we are talking about a multi-layer high-speed memory type HBM 3D with a total width of 1024 bits and bus bandwidth at 512-640 GB / s, but the numbers have digits, and here lies the problem for AMD. Known resource Fudzilla reports that the Radeon R9 390X will get at least 8 GB of video memory, but how this will be achieved is unclear. In the meantime, here’s the roots of the problem lie.

The current generation of chips HBM 3D, manufactured SK Hynix, has a capacity of not more than 1 GB on the case, twice as much capacity will be achieved only in the next generation, which is waiting for AMD simply do not have time – to produce a new generation of Radeon need as soon as possible. Even with the use of packaging with connecting 2.5D platform (interposer) install 8 GB of video memory will not allow the chip to create a sane size, and we must also take into account that the width of the bus access in this embodiment is increased to an unprecedented 8192 bits. On a serious alteration of the chip is also no time, and samples available Fiji XT, as everyone knows, with 4 gigabytes of memory HBM 3D. Another option includes the installation of two different types of memory in which memory HBM is something of a high-speed cache.

Radeon R9 390X 8GB - Myth or Reality?

But getting a bunch of work correctly – very serious problem for developers of drivers and applications. Efforts in this embodiment may require no less than in the scenario described above with the number of buildings HBM 3D. It should be noted that the presence of on-board GeForce TITAN X 12 gigabytes of memory – is largely a publicity stunt. In games such amount is not in demand even in the 3840 × 2160, and judging by the preliminary results of the tests, Fiji XT feels great and with 4 gigabytes of video memory, no monster behind NVIDIA. And in 2016 SK Hynix will switch to production of more capacious HBM 3D crystals of the second generation, which will increase the memory chips AMD Radeon little blood.

Source: wccftech.com

Radeon R9 390X 8GB – Myth or Reality? updated: March 16, 2015 author: John Malkovich