The Polaris architecture was debuted by AMD in the RX 400 series almost 4 years ago, since then AMD has released two new generations of graphics processors, Vega and Navi. It seems that the Polaris architecture will be living on a bit longer with the release of the ASUS Phoenix Radeon 550 2GB GPU, based on the Polaris 12 GPU.

This product may seem familiar and that's because ASUS released the Phoenix Radeon RX 550 back in 2017, the new Phoenix Radeon 550 uses a different memory configuration of 2 GB GDDR5 / 64-bit / 6 Gbps which is a significant step down from the 2/4 GB GDDR5 / 128-bit / 7 Gbps of the Phoenix Radeon RX 550 especially considering that card was released 3 years ago. This new card seems to have been available to OEM's for some time and is only now making it's way to retail at a hopefully cheap price.

Videocardz has gotten their hands on the launch driver for the RX 500 series of graphics cards, and it would seem that previous rumors have indeed been vindicated: the revised RX 500 series features new code names for the chips that tick at its very heart. The RX 580, according to this report, will feature a Polaris 20 XTX chip (oh ATI X1950 XTX, how I remember you from staring in awe at your price and performance in computer magazines...), while the Radeon RX 570 will be equipped with a Polaris 20 XL part. And while the RX 560 is lacking from the list, the little chip-that-probably-will, the Polaris 12, makes a cameo under the RX 550 series and a "Lexa Pro" GPU code name... Which is just so different from all others, both in form and content, that one must wonder where it is its real name or a simple placeholder.

So, it would appear that rumors and leaks about the RX 500 series being simple rebrands of AMD's RX 400 line were true. Recent leaks point to no more changes and performance increases than those achieved through higher base clock speeds on the graphics cards' GPU and memory. The architecture is the same, and the process seems to have followed the same path - as of yet, no confirmation regarding whether or not these cards do use a newer, leaner LPP process for higher clocks and less power consumption.

Reports are going around that AMD's smallest-ever Polaris chip has been seen on the OpenCL pages of CompuBench. Based on a new Polaris 12 GPU (or should it be Polaris 22?), this is a chip which is likely to power an even lower-end of the spectrum than what AMD's RX 460 (and upcoming RX 560 rebrands) already does.

Polaris 12 apparently features 10 Compute Units, which amounts to 640 Stream Processors. Remember that AMD's Polaris 11 chip which powers the RX 460 actually has 1024 stream processors, though only 896 are available for access on retail versions of the card (though some magickery can unlock those latent stream processors.) This means that Polaris 12 essentially packs half as many shaders as Polaris 11 does. The 640 Stream Processors are expected to be clocked at 1302 MHz, and the cards will reportedly ship with up to 4 GB of GDDR5 memory. Expect cards based on this GPU to sell below the RX 460's $99.

The folks at Heise online have put forward a report on how AMD's RX 500 series of graphics cards will be little less than direct rebrands of the Polaris 10 and Polaris 11 GPUs that AMD introduced with its RX 400 series of graphics cards. Apparently, a straight rebrand is in order, with the RX 580 entering the fray in the place of the RX 480, the RX 570 substituting the RX 470, and so on. Heise reports that the Polaris 10-based RX 500 should see the light of day as soon as April 4th, with Polaris 11-based solutions coming in a little later, on April 11th.

Videocardz, however, reports that these will be slightly more than a straight rebrand - if you can call a slight bump in clockspeeds as trumping a rebrand. The RX 580 is supposed to ship with base clocks ar 1340 MHz (74 MHz more than the reference RX 480), with the RX 570 carrying a much less significant 38 MHz increase over its RX 470 counterpart. Videocardz also reports on the possibility of AMD introducing a new Polaris 12 GPU with the RX 500 series, which will apparently be an even lower-end part than even Polaris 11.

Apparently AMD is working on a third GPU based on its "Polaris" (4th generation Graphics CoreNext) architecture, dubbed "Polaris 12." Snooping into the code of AMDGPU DRM kernel driver, PCI-IDs 0x6980, 0x6981, 0x6985, 0x6986, 0x6987, and 0x699F, were pointing to a descriptor "Polaris 12." There are no other known specifications of this chip.

Going by convention of Polaris 11 (Radeon RX 460) being a smaller chip than Polaris 10 (RX 470, RX 480), it's likely that Polaris 12 could be an even smaller chip. On the other hand, a chip slower than Polaris 10 makes very little sense, because it would compete with "free" integrated graphics. Another possibility is that Polaris 12 is a Polaris 10 refresh on an improved process, or even made at TSMC, in which case the higher number would mean that it's a newer chip.