Question My computer won't boot when I plug in my hdd

Nov 6, 2019
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I recently got a Toshiba X300 5TB HDD and after installing it in my PC wouldn't turn on. I did my research and tried seeing what was wrong and after making sure everything was plugged in correctly I tried booting it up without my HDD and it worked. I turned on hot plug in the BIOS and then tried plugging the HDD in while my PC was running and my PC just shut off, keep in mind I was still in the BIOS while I did this (IDK if that was a good idea or not). So I'm coming to the conclusion that it might be my power supply, but I don't want to jump to conclusions and spend money that I don't need to. I honestly don't see what else it could be, but my ears are open to any suggestions, and If I do need a new power supply how much watts would I need?
SPECS
-i7 6700k
-Cerberus 1070ti
-ASUS H170 Pro Motherboard
-Adata DDR4 3000 2OZ 2x8GB
-Intel 660p NVMe PCIe M.2 512GB
-Seasonic M12 Bronze 620W
-I also run 3 monitors, (1) 144hz, (2) 60hz
 
Nov 6, 2019
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Did you perhaps do this?

Warning: do not interchange modular PSU cables:
http://www.hddoracle.com/viewtopic.php?f=56&t=2545

If so, then this could be the result:

TVS Diode FAQ:
http://www.hddoracle.com/viewtopic.php?f=100&t=86
So long story short, I took one of my friends PSU cables because there's a chance that he might've accidentally took one of mine when I first built my PC. If it is the PSU cable ,what website or where can I go to get the proper PSU cable? Does it specifically have to be from the same brand?
 

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