so I removed the HDD and put in the SSD into the slot of HDD0 so my machine is zero HDD drives anymore
my ssd runs better on as on my old pc because here its SATA III and old one is still SATA II
when I put in my old gf970 I ran into problems as my gf970 wants a 6 pin and 8 pin and on the z620 there only very short 2x6pin
I know now that these 6pin give 200w each but I must buy a 6pin to 8pin adapter because my gf600 gave me the boot message "power down and connect pci power" at bios level
I think its time to update bios