[URL] Since you are running 2008 R2, you might be able to run the Update Package for Microsoft Windows version, but since 2008 R2 is not supported on the T7600, it may not run properly, so you can try the Hard Drive version.  Since the H800 is not supported on the T7600 at all, it is possible that none of the Dell drivers will work.
Hello everyone we recently bought dell precision t7600 and perc h800 card for  controlling powe vault md 1200 ..win server 2008 r2 is installed but no driver is working for dell perc h800 I tried so many drivers frim dell website  but always no hope ..am wondring if someone can help me ..thanks  
Dell perc h800 