Sabertooth Z87 won't boot 3d hdd

fitter1964

Distinguished
Nov 17, 2009
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18,630
System is up and running windows 7 pro. boot drive Cosair 180GB GT second hdd WD 320 sata Blue boots OK. But when I try to add a third drive same as the second drive it won't boot and I can't get into the bios, and it is upto date. The drives are good and have been formated.
 

fitter1964

Distinguished
Nov 17, 2009
61
0
18,630
Today I moved my SATA cables round SSD port 1 SATA HDD port 2 every thing is OK. But when I plug in the 3rd SATA HDD it will post and the red LED comes on. Goes to LOGO and then nothing can't even get into the BIOS at startup. Booth of the HDD are formated did them with a BLAC X USB docking station from Thermaltake. I even moved my power cables around, and that did not help ether.