It's no news that AMD's Radeon RX 570 graphics card is carved out of the same "Polaris 20" silicon as the RX 580, by disabling 4 out of 36 GCN compute units. AMD kicked a controversy recently, when it launched a China-specific Radeon RX 580-branded SKU with the core-configuration of the cheaper RX 570, confusing Chinese consumers. It turns out that this RX 580 2,048 SP SKU is based on the same exact ASIC variant of the "Polaris 20" silicon as the RX 570, with the only difference being device ID.

We watch a lot of GamersNexus content. Our GPU Database curator noticed something interesting in their recent teardown of a Dataland Radeon RX 580 (2,048 SP) graphics card directly imported from China. The unique ASIC sub-variant code etched on the GPU's aluminium reinforcement brace matches that of the RX 570. AMD internally refers to the RX 570 as "Polaris 20 XL," and its ASIC code etched is supposed to be "215-0910052." For the RX 580, the real one, aka "Polaris 20 XTX," the code etched is "215-0910038." Thanks to GamersNexus' high-resolution filming, our curator was able to spot the ASIC code for "Polaris 20 XL" on the Dataland card's GPU. This confirms that AMD merely took an RX 570 and gave it a different device ID to create the RX 580 2,048 SP, leaving consumers to wade through the confusion.