AMD Radeon RX 6600 XT gets 8GB GDDR6 and PCIe 4.0 x8

A couple more tidbits about AMD's future Radeon RX 6600 XT have been revealed by Igor's Lab. The Radeon RX 6600 family from AMD will use the Navi 23 GPU, a mid-range offering based on the RDNA2 architecture.

Igor's Lab reveals Navi 23 has a die size of 235.76mm² -- it's a 35mm x 35mm chip. Mobile variants of Navi 23 are expected to have a maximum 2350MHz frequency -- quite a bit lower than the 2684MHz of the desktop variants.

One of the more interesting parts about the new leak concerns the memory and the interface of the Radeon RX 6600 XT. On paper, Navi 23 supports up to 16GB memory but both the Radeon RX 6600 and Radeon RX 6600 XT will debut with 8GB GDDR6 memory. There is also confirmation that the Radeon RX 6600 series will use the PCI Express 4.0 interface. Only eight lanes will be needed -- these provide the same bandwidth as PCI Express 3.0 x16.

The datasheet that Igor gained access to, reveals that Radeon RX 6600 series will have indeed have PCIe Gen4 interface, which is not surprising at all, but it also confirms that the card will rely on the x8 width of the interface. This entry-level model does not require a full x16 interface, because the bandwidth of PCIe Gen4 is already as good as on PCIe 3.0 x16. -- VideoCardz

The Radeon RX 6600 series is expected to launch before the end of this quarter.