I've been playing with a PCIe x1->x16x "bitcoin" riser and aside of connecting external GPU to a Celeron J1900 board (which has only x1) I've compared how the same GPU will perform on x16 and on x1 on another computer. I've run multiple phoronix benchmarks and it turned out UrbanTerror has a big performance drop on x1 - so it looks like it has a lot of GPU traffic:
Is this something than can be optimised? (maybe shared graphics would like that too).
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