user 18 said:
I`m going to ask this as clearly as I can.
Does the heatsink or fan on the single slot 5770 stick out to the point where the adjacent slot becomes unusable
No --- Hence the SINGLE SLOT designation !!
From the card specs :
Card Dimension -- 8.5x 4.376x .75 in
So it is .75inches wide if you want to check for yourself ! -- and Here is a profile shot so you can see the thickness in relation to the back slot case cover :