$PRL has announced plans to change from integer matrix math to floating-point FP8, which matches real AI inference hardware. After activation, only GPUs with FP8 tensor cores on the whitelist can mine: Hopper (H100/H200), Blackwell datacenter and pro cards, plus consumer Blackwell like the RTX 5090, 5080, and 5070 series.
Older cards get cut off—RTX 4090 and everything Ampere or below (3090s, 3060s, A100s) are out. The team’s explicit goal is to favor hardware that can do actual useful AI work and squeeze out pure “useless” mining rigs, so yes, a lot of current GPU miners will be unprofitable or unable to participate.