hdd keep getting fried

[samlacho]

Pretty strange issue.

So I recently updated my computer with new mobo psu. When I first put everything back together soething fried my hdds, cpu and water cooler. So got new psu and new mobo. Redid everything and it fried my hdds again. Done outside case. Im fairly sure it's not the psu causing this. Is there anyway a mobo could fry hdd via sata? Literally every thing else works on rig. Disk drive will be recognized via sata but as soon as hdd is plugged in it gets fried. No clue what would cause just hdds to fry but nothing else

I 4770k
16gb ram
970 sli
850 psu
gigabyte z97x mobo
wd 1tb
pny ssd
Corsair h100i water cooler

 

[J_E_D_70]

Any chance the psu is set to the wrong input (110 vs 220)?

 

[DataMedic]

I very highly doubt that the motherboard has anything to do with it. I've seen several cases where one molex string coming out of the PSU was putting out way too much voltage and killed any hard drive connected to it. Try buying a PSU voltage tester such as this: http://www.rakuten.com/prod/thermaltake-a2358-dr-power-supply-tester-atx-motherboard-atx12v/208145979.html?listingId=-1&sclid=pla_google_rakuten.com&adid=29963&ds_e_ad_type=pla&gclid=Cj0KEQiAz7OlBRDErsTx47LKz-8BEiQAY0OlYuaxdR1fXX5Sy8vd__frMORURjxv25945uXDDhg2BV4aAud18P8HAQ and test the voltage coming off of it. If you want to leave the mainboard disconnected you can just put a jumper between the green wire and one of the black wires of the main harness to power on the PSU.

 

[samlacho]

That might make sense....but this is my second psu as well. I doubt both were outputting to much

 

[fzabkar]

PSUs use modular connectors. The pinout for these connectors is not standard, so when you mix old cables with a new PSU you may end up with 12V on the 5V pins, or reverse polarity.

If you examine the TVS diodes on your HDD's PCB, one of them will most probably be shorted. In your case I would expect that the 5V diode would be the victim, in which case this would prove that the drive was hit with an overvoltage on this input.