I have this issue that I haven't really thought about before I bought my motherboard.
I've recently tested a EN8800GTS graphics card in my system and I had to remove all my SATA ports just to put the GPU into my case, I could only use the 4th SATA port and still it bent the port, I'd like to know if there's anyway I can dodge this problem.
I know that I can use right angled SATA cables but all my right angled cables are faced in one direction so I can't use the same right angled sata cables for the 2 SATA ports behind the first two that I use the right angled one for.
If it's possible to get a right angled sata cable that goes in the opposite direction of the SATA ports 1 and 4 then those cables should work fine.
I am using one in my system because all 6 of my onboard connects are in use and needed 2 more to setup the system to boot into Hackintosh OS X 10.8.2. It works very well and supports hot swap hot plug Multiplier and Trim support.
It would allow you to use your GPU and bypass the onboard SATA connectors all to gether.