The benchmarks I've seen - only a few, and only because my partner was watching them - show it basically neck and neck with a PS5. Not a PS5 Pro, to be clear, and a PS5 slim is only $650, but the Steam Machine isn't underpowered in console gaming terms.
Price point is PS5 Pro which technically is RDNA2 but has back ported features from RDNA3 & 4. It has 60 cores. Consensus is PS5 Pro outperforms steam machine by 20-30% on graphics.
Wait, really? I looked at the specs and saw like 2/3 the CUs of a PS5.