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Title: riser only 12 volt problem Post by: trippcheck on May 19, 2017, 10:37:07 PM i have a server psu
output only 1200 Watt 12 Volt i connect the riser to 12 volt gpu fans not spinning by power on rig is riser direct connect to normal PSU with 12 and 5 volt fans are spinning need the powered usb riser 12 and 5 volt? Title: Re: riser only 12 volt problem Post by: KougarLOB on May 19, 2017, 11:57:06 PM You answered your own question.
Yes, the card needs voltages other than 12. Some risers, generally the higher quality ones, regulate the voltage down from a single 12v source. These have a 6-Pin Molex Mini-Fit Jr (PCI-E) connector. Others utilize a mix of 12 and 5v and use a 4-Pin connector. The 4-Pin styles typically consume more energy than the 6-Pin ones - even without a card connected. Example of what I'm using: http://www.ebay.com/itm/131962699972 Do not use the included SATA-to-6pin. You will burn up the SATA connector. Extract the pins and reuse the plastic 6-Pin if you build your own cable. Title: Re: riser only 12 volt problem Post by: uray on May 19, 2017, 11:57:27 PM riser use 12v and 5 volt, unless you are using 6-pin powered riser which has stepdown converter built-in for 12v to 5v
Title: Re: riser only 12 volt problem Post by: superminator on August 04, 2018, 07:39:53 AM You answered your own question. Yes, the card needs voltages other than 12. Some risers, generally the higher quality ones, regulate the voltage down from a single 12v source. These have a 6-Pin Molex Mini-Fit Jr (PCI-E) connector. Others utilize a mix of 12 and 5v and use a 4-Pin connector. The 4-Pin styles typically consume more energy than the 6-Pin ones - even without a card connected. Example of what I'm using: http://www.ebay.com/itm/131962699972 Do not use the included SATA-to-6pin. You will burn up the SATA connector. Extract the pins and reuse the plastic 6-Pin if you build your own cable. One question, can I plug a connector molex 6-pin in a 4-pin riser with an adapter?. What about voltajes?. I don’t have more 4-pin connectors in my power supply. Best regards. Title: Re: riser only 12 volt problem Post by: Zorg33 on August 04, 2018, 09:15:16 PM No. 5V is needed for risers with molex 4pin connector.
You have to use 6pin risers that only need 12V. Title: Re: riser only 12 volt problem Post by: swogerino on August 04, 2018, 09:21:54 PM CompTIA A+ certified technician here and I want to answer the question by first telling everyone here that the PSU simply converts AC into DC and the motherboard cables only supply three different rails, 12 v ,5 v and 3.3 v . There is no other voltage, keep in mind a +-10% is the maximum tolerance.
Based on that , riser which use a 6 pin needs 12 v and these are also the most stable risers for the moment. |