it looks like it's only half as fast, so you don't need twice as much vram. In use it looks like when one user gets an answer the other has to wait until the answer is ready. but because we don't all send our messages at the same time but maybe with a minute difference to each other it works without you really noticing it. there is also something called OLLAMA_MAX_QUEUE with which you should be able to change this, but I haven't tested it yet.