As so many have already said,
There shouldn't be any problems running even 4xIR with that setup. Somehow I feel that there are some issues with either Dolphin's settings or background programs. As DatKid20 already said, it would help to get a screenshot of your task manager window, but also screens of Dolphin's settings tabs as they would maybe give an idea if there is something really wrong with them.
There shouldn't be any problems running even 4xIR with that setup. Somehow I feel that there are some issues with either Dolphin's settings or background programs. As DatKid20 already said, it would help to get a screenshot of your task manager window, but also screens of Dolphin's settings tabs as they would maybe give an idea if there is something really wrong with them.