The specifications of AMD’s lower-end RDNA 3 graphics have surfaced, courtesy of RedGamingTech. The leaked GPUs include the Radeon RX 7800 XT, 7700 XT, and RX 7600 XT. One will be a chiplet design based on the Navi 32 core (7800 XT), while the other two will likely retain a monolithic die. Like Navi 31, it’ll be paired with disaggregated memory dies featuring 16MB of L3 cache and a 64-bit bus per die.
Overall, we’re looking at an upper midrange graphics card featuring 3,840 shaders across 60 Compute Units (CU) running at 2.8GHz under load (2.6GHz base clock). The Navi 32 core will be paired via a 256-bit bus and 64MB of L3 cache to 16GB of GDDR6 memory running at 20Gbps. The Radeon RX 7800 XT will have a TBP of 280W, 20W less than the RX 6800 XT and the RX 7900 XT. It should cost around $749.
Going by these numbers, it looks like AMD will once again have the VRAM advantage with a 16GB VRAM buffer versus 12GB on the GeForce RTX 4070. It’ll also pack a higher amount of LLC, 64MB versus 36MB, on the RTX 4070. Additionally, the RX 7800 XT will have a wider 256-bit bus, while the RTX 4070 will be limited to 192-bit.
Moving down the ladder, the Radeon RX 7700 XT will pack 3,072 stream processors across 48 Compute Units (CUs) alongside 12GB of GDDR6 (20Gbps) memory across a 192-bit bus. The Infinity Cache will be cut down to 48MB, and the TBP will come down to 225W. The GPU will have a boost clock of 2.6GHz with a base frequency of around 2.4GHz. Its MSRP should be around $549.
Last but not least, the RX 7600 XT will come with 2,048 shaders across 32 CUs and 8GB of GDDR6 memory via a 128-bit bus for a TBP of 180W. The RX 7600 will cut the core down to 1,792 shaders and a TBP of 140W.
By RedGamingTech’s estimates, the Radeon RX 7800 XT will be only 25% faster than its predecessor and roughly on par with the RX 6950 XT. The RX 7700 XT is expected to be 30-40% faster than the RX 6700 XT, while the RX 7600/7600 XT should be equivalent to the RX 6650 XT/6700 XT. Like the RX 7900 series, its lower-end siblings will leverage dual-issue SIMD units for higher throughput in select workloads. From what we’ve seen, though, few gaming applications benefit from double pumped instructions.