Precision T3600 & FirePro S9010 - Driver Help

Hi, I have a Precision T3600 with a FirePro w7100, and I am trying to add a FirePro S9010 for extra GPU rendering. However, with the s9010 installed in the 2nd pcie slot, the system reboots when it almost gets to windows login screen. I am currently running driver package 15.201.2401 - from AMD direct as the W7100 is not from Dell According to the AMD website the same driver package is used for the s9010, however, I am aware that Dell OEM cards sometimes need Dell specific, but I cant find driver anywhere With the W7100 removed and the s9010 in pcie slot 1 (w7100 not in slot 2) the system boots fine Any assistance is greatly appreciated