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Thread: PSU Compatible with SATA 3.3

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    Default PSU Compatible with SATA 3.3

    Hi! New here!

    I'm looking for a PSU that supports SATA 3.3 standard specifically regarding the Disable Power feature. As some of you might be aware, this feature allows the 3rd PIN in the SATA connector to be used for some remote management of the disk instead of supplying 3.3v.

    The issue is that I've bought 40TB of disks that require the 3rd PIN to not deliver 3.3v. Indeed, when connected the drive won't spin.

    Are you aware of any PSU that completely supports SATA 3.3 (together with compatible SATA connectors)?

    I'm only aware of Seasonic including ONE adaptor to make new disks work. But I'm looking for a definitive adaptor-free/tape-free solution.

    PS: I'll be using the PSU in a custom build NAS, so ideally I'm looking at 450/500 W PSUs.

    Thanks!

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    Default

    Every PSU supports it if you cut the wire.

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    Which means I guess I can stop my search for a compatible PSU? I had anyway low hopes if I've to be honest.

    It's a pity though because I'd prefer to not mess with wires, tape, adaptors.

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    I do wonder why it's so hard for power supply companies to use connectors that only supply the 3.3V to pins 1 and 2 but not pin 3, as this seems to be what the standard is calling for anyway.

    On the other hand, I wonder why SATA-IO chose to have the PWDIS signal go high to disable - I'd think that low-to-disable with a pull-up inside the drive would have avoided all this mess in the first place. Unfortunately it's probably too late for them to change that.

    But yes, cutting the 3.3V wire or using a molex-to-SATA adapter should do the trick, as pretty much nothing really uses 3.3V anyway. Just avoid the adapters with molded plugs if you choose to go that way, unless you enjoy spontaneous combustion. The kind with the clipped-in pins are fine.

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    Its the same question why the PCIe consortium didn't use the EPS12V Connectors for the Graphics cards.

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