Kikk litt på artikkelen fra
Tom's Hardware. Den er riktignok fra 2011, men har noen interessante observasjoner:
Three- And Four-Way CrossFire
The performance of three- and four-way CrossFire setups not only surprised us, but also managed to utterly convince us that micro-stuttering doesn't have to affect your multi-GPU configuration. For some reason, the third GPU almost always eliminates micro stuttering and has a less-pronounced effect on performance. At least in the games we ran, the fourth GPU is more eye candy than anything, and its contribution is minimal.
Den har blitt sitert på
Wikipedia sin artikkel om micro stuttering.