uhhuh Posted October 23, 2014 Share Posted October 23, 2014 My question is can a double 4 pin be expanded using the passthroughs in the photo to support 8 hard drives? They currently are powering 4 drives of various size and speed. PSU - SeaSonic SS-750KM3 750W (http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087) Case - NORCO RPC-4020 4U Rackmount Server Chassis w/ 20 Hot-swappable SATA/SAS Drive Bays (http://www.newegg.com/Product/Product.aspx?Item=N82E16811219021) Passthrough - Came from a Hiper PSU. Quote Link to comment
garycase Posted October 23, 2014 Share Posted October 23, 2014 Sure, there's no problem with that. Your PSU has a single 62a 12v rail, which is plenty for your needs. I'd spread the distribution among the available cables from the PSU, as you don't want to pull all the amperage from a single cable run (THAT would likely overload the cable). Quote Link to comment
pkn Posted October 23, 2014 Share Posted October 23, 2014 Just make sure the MOLEXes are pinned straight... You will be laughing, but I've killed three 4TB Seagates at once, when connected them using PSU-to-MOLEX cable from a different PSU, which resulted in 12 volts put onto drives 5 volts input... Quote Link to comment
sureguy Posted October 23, 2014 Share Posted October 23, 2014 Some molex cables while pinned properly, are made of really soft plastic, and can be inserted, with enough force, backwards. Quote Link to comment
IG82 Posted October 23, 2014 Share Posted October 23, 2014 Sadly sounds exactly the same as what I did! 2x 1.5TB drives one after another, if the first one had made the burning smell I wouldn't have been daft enough to try the 2nd! Quote Link to comment
pkn Posted October 23, 2014 Share Posted October 23, 2014 Sadly sounds exactly the same as what I did! 2x 1.5TB drives one after another, if the first one had made the burning smell I wouldn't have been daft enough to try the 2nd! If you still have the drives... and if they are Seagates... wait... no, I can't remember which ones were what... will have to look out when home. The thing is, HDDs have a diode connected directly to power input, which is made specifically for the purpose to sacrifice itself in cases like this. I remember that I googled something like "put 12v on HDDs 5v" and found some recommendations, some even with microphotos. Following those recommendations - basically, to solder in a shunt, shortening the dead diode - I was able to revive* two of these drives, but not the third one... can't remember was the third one a WD, or was it Seagate, just a different model... That said, you are still 1TB smarter luckier than I am ------------------- * -- Of course, with the diode shortened, they don't have any protection against power catastrophe anymore, but they are still working... Quote Link to comment
uhhuh Posted October 25, 2014 Author Share Posted October 25, 2014 Excellent. Thank you all for the responses. Quote Link to comment
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