if you are in the market for a gaming mini PC or laptop with a powerful APU, the best option currently available is the AMD Ryzen AI MAX+ 395

it’s roughly on par with the Nvidia GeForce RTX 2070 SUPER and outperforms the RTX 3060 (yes, the desktop GPUs)

if you want to try the significantly more affordable Intel Arc cards, but heard they underperform, take solace in the knowledge that the B580 is roughly on par with the RTX 2060 in the 12GB vRAM configuration

and as for the closest available Radeon alternatives to GeForce RTX 50 series cards:
• GeForce RTX 5070 Ti ≈ Radeon RX 7900 XTX
• GeForce RTX 5070 ≈ Radeon RX 7900 XT
• GeForce RTX 5060 Ti ≈ Radeon RX 7700 XT
• GeForce RTX 5060 ≈ Radeon RX 6750 XT

know that although there is no competitor to the gaming performance of the RTX 5090 or 5080, those sell for ~$3000 and ~$1500, respectively, while none of the options listed above exceeds $1000

which brings me to the most powerful budget cards:
• below $250 = Intel Arc B580
• below $200 = Intel Arc A580
• below $170 = Radeon RX 6500 XT
• below $160 = Radeon RX 580
• below $150 = Intel Arc A380
• below $100 = Radeon R9 380