Hello Guys,
I’m going to buy Seasonic Prime TX 1300W
https://seasonic.com/prime-tx/#specifications
It has 4x4SATA cables = 16 SATA connectors and then additional 2xSATA cables which are 3.3V. I’m not sure if I can use these additional 2 SATA cables with HDD/SSD and whether they’ll run stable.
Just to clarify, this is the cable i’m confused with the 3.3V cables
Any help would be really appreciated.
Thanks
What did Seasonic product support say?
I did not contact them yet ;(
It seems I have this power supply on my current PC/WS.
I didn’t pay attention to it. Will try to look into it.
Okay, sure. Will ask Seasonic support as well.
The confusing part about this cable is that the label on my cable is “SATA 3.3”. It doesn’t show “V” which is confusing as it would seems the pinout for this cable doesn’t have a 3.3V rail (4 wires instead of the 5 for the other SATA power cable).
I suspect the cable tag/label is refering to SATA version 3.3.
I have to dig deeper, but what I have found so far on the internet is either 3.3V on pin 1-3 or Reserved on pin 1-2 and power_enable on pin 3.
SATA datasheet is restricted to SATA members.
Not sure this is why i asked here but have contacted Seasonic Support as well and waiting to hear from them!
Take this opportunity to ask their commercial support whether you can buy extra 4-drive SATA power cables.
This is what I found:
The take here is that the SATA group has decided to repurpose the SATA power connector and has retired Pin 1 and Pin 2, meaning that those pins are no longer used to provide the 3.3V rail to the SSD/HDD. In the same manner, they have also repurposed Pin 3 to be used by entreprise drives as an enable/disable signaling pin (search on this forum issues reported by users chucking HDD from enclosure complaining the drive wasn’t powering up and found that they had to isolate Pin 3 with tape.)
Here’s the response i got from Seasonic:
Thank you for contacting Sea Sonic.
The SATA 3.3 V cable is a specific cable where the +3.3 V rail is removed from the SATA power connector. This design is intended for certain HDDs that use the PWDIS (Power Disable) feature, where the presence of +3.3 V on pin 3 prevents the drive from starting. By removing the +3.3 V line, these drives can operate normally.
Most SSDs and standard consumer HDDs do not use the +3.3 V rail, so this cable typically works the same as a standard SATA power cable for those devices.
Nice!
But then the cable should really be labelled “NO 3.3V”.
So, i guess I can use that 3.3V labeled connectors for powering up the HDD/SSD or even backplane right?
Exactly, my point.
This is what I wrote earlier:
and confirmed with this post:
