Product Crippled at birth
I have always found these artificially crippled GPUs with cut-down memory bus insulting to both customer and the chip itself.
The performance is going to suffer a lot - a 7900XT has max 800GB/s bandwidth (2900 GB/s effective), the 7600 only sports up to 288GB/s (effective 476,9 GB/s).
8GB of VRAM is going to be the least of the GPU's problems.