ethomaz said:
Not true... more close to 50%.  ATI: Catalyst 13.1 WHQL HD 7790: 12.101.2.1-130313a March 22, 2013. http://www.techpowerup.com/reviews/AMD/HD_7790_CrossFire/ |
That's a low end card which as bandwitdh issues. Also that's an average of games some of which don't scale well. The ones that scale do at almost 90% efficiency. However you have games like Batman Arkham Asylum which don't scale at all. Essentially console ports usually suck at scalling
Games like Farcry 3, Crysis 3, Metro 2033 or any powerhouse games that are properly coded for PCs often see 100% scalling with second GPU.
http://www.hardocp.com/article/2012/12/05/far_cry_3_video_card_performance_preview/3#.UXGB17VJM1I
You can go through this list and you will see that every game scales almost 100% with 7970 crossfire
http://www.guru3d.com/articles_pages/asus_radeon_hd_7970_crossfire_review,1.html
Anno 1404 doesn't scale at all and drags the average down.
