Some Old Newspaper articles are worth saving.
AMD Radeon HD 5870 Triple CrossFireX Performance Testing: http://www.pcper.com/article.php?aid=796
Author: Ryan Shrout
Date: Oct 16, 2009
Subject: Graphics Card
Let me just say it: running triple Radeon HD 5870s in CrossFireX was a gaming experience that puts just about everything else to shame.
I say "just about" because what I really still NEED to have is this power combined with three of these 2560x1600 panels to find the true gaming nirvana of legend.
Once we are there, you can probably just shut down PC Perspective for a while...