A simulated Radeon RX 7800 XT graphics card puts AMD’s upcoming GPU between an RTX 4070 and RTX 4070 Ti while offering a larger memory pool, according to findings from Igor Wallossek. igor’s lab has simulated the performance delivered by an RX 7800 XT using a professional Radeon Pro W7800 card. Having the closest GPU configuration, it provides a good opportunity to get a glimpse at what awaits us on AMD’s upper mid-range lineup. But as usual, take these numbers with a pinch of salt.
There are assumptions galore. For his simulation, Igor believes the upcoming Radeon RX 7800 XT carries 70 Compute Units clocked at 2GHz alongside 16GB of 20Gbps GDDR6. To do so, he overclocked the memory and artificially limited the available amount. This resulted in a 4.1 per cent uplift at HD (1080p) resolution, 8 per cent at QHD (1440p), and 12.5 per cent at UHD (2160p) compared to an RX 6800 XT. These tests show that the RX 7800 XT will probably slot just between an RX 6900 XT / RTX 4070 and an RX 7900 XT / RTX 4070 Ti, while most likely offering more VRAM than the latter.
Not bad, but not exceptional either, especially if we consider that currently, the RX 7800 XT is rumoured to feature 60 Compute Units comprising 3,840 Stream Processors, 64MB of Infinity Cache, 16GB of 21Gbps GDDR6 memory, and a TBP of 285W. Engine frequency is not known, but we expect it to be some way above 2GHz used by Igor – perhaps as high as 2.8GHz.
Note that while the W7800’s 4,480 Stream Processors and 256-bit bus use a bigger, more expensive Navi 31 chip, potential 7800 XT can be covered by the as-yet-unreleased Navi 32 GPU, topping out a 3,840 shaders.
Igor has also done some power consumption measurements showing around 237W which is 36W lower than the RX 6800 XT. We clearly just scratched the surface, so for a more detailed analysis check Igor’s full take here.
