Not true. Maybe for lower end GPU like 1050/1650 or below but for RTX 2080 changing a VRAM chip isn't that hard of a task (for someone who has required equipment and knows soldering). Biggest problem is acquiring a working VRAM chip probably from a donor board or through shipping direct from china.
I know someone from youtube who repairs GPUs, motherboards, PSU etc. and doesn't charge that much but his queue of pending orders is huge. I'm talking about 50+ costumers with some sending multiple cards to him so he's always busy and never manages to finish his repairs in time. This is probably true for most repair shops so unless there's one near your location where you can go and get it fixed on the spot (as they will probably give it priority) you should just buy a separate GPU and get rid of this card.
Also have you confirmed its really a VRAM issue by ruling out other components like RAM or windows itself ? or testing the GPU memory modules through a memory test software?
Some links that might be of use to you:
Cuda memtest |
GPUmemtest (can only verify upto 4GB VRAM) |
gpu memtest (vulkan)
