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Title: Powering risers with server PSU Post by: WalterWhack on June 15, 2017, 04:15:01 AM Hello! First time poster/lurker here. I am building my first rig and there is only one issue I can't get to the bottom of. The powered risers mostly take molex or sata connectors, but I will be using a server PSU to power the entire rig (including the main board using a PICO ATX adapter). How can I supply the risers with the proper voltage using the correct connectors powered with my server PSU? Thanks in advance! You have all already been so helpful.
Title: Re: Powering risers with server PSU Post by: fusion0389 on June 15, 2017, 12:11:29 PM Hello! First time poster/lurker here. I am building my first rig and there is only one issue I can't get to the bottom of. The powered risers mostly take molex or sata connectors, but I will be using a server PSU to power the entire rig (including the main board using a PICO ATX adapter). How can I supply the risers with the proper voltage using the correct connectors powered with my server PSU? Thanks in advance! You have all already been so helpful. You need to buy risers that have a PCIE connector. There are two types of risers that are very common, the most common is the molex one w\sata adapter. However, there is another kind that has a PCIE instead of a molex connector. Title: Re: Powering risers with server PSU Post by: WalterWhack on June 15, 2017, 09:35:00 PM Thank you! These are exactly what I was looking for.
Title: Re: Powering risers with server PSU Post by: topgeek on June 15, 2017, 11:08:24 PM how many volts are risers using?
What about the "issue" I've read on here that the motherboard and risers should have the same power source? Title: Re: Powering risers with server PSU Post by: kjs on June 15, 2017, 11:14:34 PM how many volts are risers using? What about the "issue" I've read on here that the motherboard and risers should have the same power source? PCIe powered risers with a 6-pin PCIe power connector are 12V. PCIe powered risers with a Molex power connector are 12V. PCIe powered risers with a SATA power connector are 5V. Title: Re: Powering risers with server PSU Post by: iamnoobplzhelp on June 15, 2017, 11:35:49 PM how many volts are risers using? What about the "issue" I've read on here that the motherboard and risers should have the same power source? This is not an issue. Many of my rigs have different power supplies powering the risers vs the motherboard. Where you WILL run into issues if you try to plug in 2 different power sources into the same GPU. Some GPUs require 8 pin + 6 pin. Don't use 6 pin from one GPU and 8 pin from another. Title: Re: Powering risers with server PSU Post by: nerdralph on June 16, 2017, 12:46:16 AM how many volts are risers using? What about the "issue" I've read on here that the motherboard and risers should have the same power source? PCIe powered risers with a 6-pin PCIe power connector are 12V. PCIe powered risers with a Molex power connector are 12V. PCIe powered risers with a SATA power connector are 5V. Wrong. The risers require 12V (USB risers actually require 12V & 3.3V, and have a 3.3V regulator on board). SATA power connectors have 12V, 5V, & 3.3V (some don't follow the spec and drop the 3.3V). Title: Re: Powering risers with server PSU Post by: topgeek on June 16, 2017, 01:42:55 AM Thanks for the clarification - so no matter which type of connector a riser uses, it is pulling 12volts from that connector. Got it.
re: Motherboard I've read on here many times in various threads (and it was recently stated in a Bits Be Trippin youtube video) that the motherboard and risers need to be on the same PSU. Is this not true? cheers! p.s. thanks for the reminder that if a single video card has two PCI connectors (6+6, 6+8 or 8+8) they MUST be from the same PSU for that single card. |