Question About HP z600 & Radeon R9 280x

[o00semsem00o]

Hello,
i have a HP z600 workstations its 650w PSU doesn't have enough suitable cables to power the r9 280x
psu have

Notes
i tried the Y-splitters and powered all from one molex , it works but it restarts when rendering or gaming
And want to mention that Radeon R9 280x is working very good in HP Z420 Workstation....that so weird
thank you

 

[Dark Lord of Tech]

REPLACE the PSU with a standard ATX that has the proper power connections.

View: https://www.youtube.com/watch?v=9X5I3I8Wzf0

 

[o00semsem00o]

the PSU of HP z600 workstations its very unique how i can REPLACE ?