Legit Reviews posted a review on the ATI Radeon HD 3870 + 3850 CrossFire
Having a mixed up CrossFire configuration performed better than expected and was able to near the performance level of other high end ATI CrossFire setups. This goes to show that ATI has made great improvements to their CATALYST drivers as taking an ATI Radeon HD 3870 and running it in CrossFire mode with an ATI Radeon HD 3850 was found to be stable and offered great improvements over a single card of either model. How many people will actually try this has yet to be seen, but this is an easy way to cut costs and improve performance...ATI Radeon HD 3870 + 3850 CrossFire - Mixing Video Cards
