Sapphire quietly introduced a slightly bolstered Radeon RX 550 graphics card that's based on the "Polaris 21" silicon, rather than the Polaris 20 "Lexa" silicon, called simply the Pulse Radeon RX 550 2GD5/4GD5 (model: 11268-16 for 2 GB and 11268-15 for 4 GB). Consumers should pay attention to the model number. "Polaris 21" is the same chip AMD bases the RX 560 on. This particular card has 10 out of 16 compute units physically present on the chip, which translates to 640 stream processors, higher than the 512 stream processors the RX 550 is originally endowed with. Other vital specs include 40 TMUs, and 2 GB or 4 GB of GDDR5 memory clocked at 6.00 GHz, over a 128-bit wide memory interface (96 GB/s memory bandwidth). The GPU is clocked at 1071 MHz. The card relies on the PCI-Express slot for power, its display outputs include one each of DVI, HDMI 2.0, and DisplayPort 1.4. Sapphire could be going after the sweltering PUBG crowd.

PowerColor announced market availability of its Radeon RX 570 4 GB Red Devil graphics card. The company had announced the card at the RX 570 SKU launch. It is Positioned above the RX 570 Red Dragon, and is characterized by a high-end looking product design, featuring a long custom-design PCB, mated with an equally long 2-slot, triple-fan cooling solution, which features an aluminium dual-fin-stack heatsink ventilated by a trio of 70 mm fans, which stay off when the GPU is idling. PowerColor also included a back-plate to add to its premium appeal.

The Radeon RX 570 4 GB Red Devil features factory-overclocked speeds of up to 1320 MHz GPU (boost), compared to reference frequencies of 1275 MHz; and its memory is left untouched at 7.00 GHz (GDDR5-effective). Based on the 14 nm "Lexa" silicon, the Radeon RX 570 features 2,048 stream processors across 32 GCN compute units, 128 TMUs, 32 ROPs, and a 256-bit wide GDDR5 memory interface. The RX 570 Red Devil draws power from a single 8-pin PCIe power connector; display outputs include three DisplayPort 1.4, and one each of HDMI 2.0 and dual-link DVI.

BIOSTAR introduced its first custom-design Radeon RX 580 graphics card, the RX 580 8 GB Dual Cooling (model: VA5805RV82). The company had announced its foray into AMD Radeon graphics cards with a reference-design RX 580, in April. The new RX 580 Dual Cooling combines an AMD-reference design PCB with a custom-design cooling solution. This cooler features an aluminium heatsink with a copper core over the GPU; ventilated by a pair of 80 mm fans, which stay off when the GPU is idling.

The card sticks to AMD reference clock speeds of 1257 MHz core, 1340 MHz boost, and 8.00 GHz (GDDR5-effective) memory. It features 8 GB of memory over a 256-bit wide memory interface. Based on the 14 nm "Lexa" (Polaris 20) silicon, the Radeon RX 580 features 2,304 stream processors, 144 TMUs, and 32 ROPs. The card draws power from a single 8-pin PCIe power connector. Display outputs include three DisplayPort 1.4, one HDMI 2.0, and a dual-link DVI. The company didn't reveal pricing.

AMD today announced the Radeon RX 500 series graphics cards. The lineup is based on a "refined" variants of the "Polaris" family of GPUs that power the RX 400 series. These include manufacturing-level refinements on the 14 nm FinFET process, which enable higher clock speeds; lower idle and multi-monitor power draw, and a host of software features. The lineup consists of four SKUs, beginning with the Radeon RX 550 at a sub-$79 price point, followed by the Radeon RX 560, which succeeds the RX 460 at $99; the RX 570, which starts at $169, and the RX 580, which is priced at $199 for the 4 GB variant, and $229 for the 8 GB variant.

The RX 580 and RX 570 are based on the 14 nm "Lexa" Polaris20 silicon. This chip is nearly identical to the "Ellesmere" Polaris10, except for the manufacturing-level improvements that enable higher clock speeds. The RX 580 features 2,304 stream processors across 36 compute units, 144 TMUs, 32 ROPs, and 8 GB or 4 GB of GDDR5 memory across a 256-bit wide memory interface. The core is clocked at 1257 MHz, with 1340 MHz boost, and 8.00 GHz (GDDR5-effective) memory. The RX 570, on the other hand, features 2,048 stream processors across 32 compute units, 128 TMUs, 32 ROPs, and clock speeds of 1168 MHz core, 1244 MHz boost, and slightly faster 7.00 GHz (GDDR5-effective) memory. Although available in 4 GB and 8 GB variants, 8 GB appears to be the most common memory amount for the RX 580, and 4 GB for the RX 570.