AMD Radeon RX 400 series
 |
|
| Release date | 29 June 2016 |
|---|---|
| Codename |
|
| Architecture | GCN 4th gen |
| Cards | |
| Entry-level | Radeon RX 460 |
| Mid-range | Radeon RX 470 Radeon RX 480 |
| API support | |
| Direct3D | |
| OpenCL | OpenCL 2.0 |
| OpenGL | OpenGL 4.5 |
| Vulkan | |
| History | |
| Predecessor | AMD Radeon Rx 300 Series |
The Radeon 400 series is a series of graphics cards made by AMD. These cards were the first to feature the Polaris GPUs, using the new 14 nmFinFET manufacturing process. The Polaris family initially included two new chips in the Graphics Core Next (GCN) family (Polaris 10 and Polaris 11). Polaris implements the 4th generation of the Graphics Core Next instruction set, and shares commonalities with the previous GCN microarchitectures.
The RX prefix is used for cards that offer over 1.5 teraflops of performance and 80 GB/s of memory throughput (with memory compression), and achieve at least 60fps at 1080p in popular games such as Dota 2 and League of Legends. Otherwise, it will be omitted. Like previous generations, the first numeral in the number refers to the generation (4 in this case) and the second numeral in the number refers to the tier of the card, of which there shall be five. Tier 4, the weakest tier in the 400 series, will lack the RX prefix and feature a 64-bit memory bus. Tiers 5 and 6 will have both RX prefixed and non-RX prefixed cards, indicating that while they will both feature a 128-bit memory bus and be targeted at 1080p gaming, the former will fall short 1.5 teraflops of performance. Tiers 7 and 8 will each have a 256-bit memory bus and will be marketed as 1440p cards. The highest tier, tier 9, will feature a memory bus greater than 256-bit and shall be aimed at 4K gaming. Finally, the third numeral will indicate whether the card is in its first or second revision with either a 0 or 5, respectively. Therefore, for example, the RX 460 indicates that it has at least 1.5 teraflops of performance, 100GB/s of memory throughput, has a 128-bit memory bus and will be able to achieve 60fps in the previously mentioned games at 1080p.
This series is based on the fourth generation GCN architecture. It includes new hardware schedulers, a new primitive discard accelerator, a new display controller, and an updated UVD that can decode HEVC at 4K resolutions at 60 frames per second with 10 bits per color channel. On December 8, 2016, AMD released Crimson ReLive drivers(Version 16.12.1), which make GCN-GPUs support VP9 decode acceleration up to 4K@60 Hz and twinned with support for Dolby Vision and HDR10.
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