Two 12v rail GTX670 Tags: Power Supplies Support Components Last response: November 26, 2012 8:13 AM in Components Share arundar November 25, 2012 8:55:45 PM Can anyone tell me if I have a Seasonic M12II-520 W ....with two 12v rails and 20A on each....would it support the GTX670? Or do i need a single rail with 40A+ More about : 12v rail gtx670 Z1NONLY a b ) Power supply November 25, 2012 10:20:08 PM The PCI-E connectors need about 15 amps for themselves. If they are on a single rail together then that will leave very little current for them to "share" with other devices. It *might* actually work, but it's not something I would try with valuable equipment. arundar November 25, 2012 11:22:57 PM But there are 2 rails...so I could use one for GPU and the rest for cpu,mobo? Related resources + 12v rail amp question - Forum 2 seperate + 12v rails into 1 Graphics Card? - Forum Which two are + 12V rail ? - Forum I5 3570K good enough for GTX670 or HD7950? - Forum TP-750 + Gigabyte GTX670 Windforce OC, how to wire up? - Forum Can't find your answer ? Ask ! Get the answer Z1NONLY a b ) Power supply November 26, 2012 12:45:24 AM The CPU, MB and other devices will be used by whatever rail they are connected to internally. You don't get to pick what connectors are on what rails. Those decisions were made for you at the factory. Without knowing exactly which connectors are on which rails, you are just rolling the dice. arundar November 26, 2012 8:13:48 AM Just found out it seems this PSU has a single rail...lol..... http://www.hardwaresecrets.com/article/Seasonic-S12II-B... Can't find your answer ? Ask ! Publish Related resources : ForumTP-750 + Gigabyte GTX670 Windforce OC, how to wire up? ForumOne 12V rail vs two (or three)? | Antec 300 vs Cooler Master HAF 912? ForumTwo 12V rail Forum+ 12v Rail showing 8v on two PSUs ForumIs quad 12v rail better thena two 12 v rails? ForumPSU w/ 18A on 12V rail for GTX 650? ForumDual rail 12V 16A vs single rail 12v 24A ForumSingle 12V rail or multiple 12V rails? The eternal question answered Forum550W Powersupply. Do you combine current on each + 12V rail ForumNot enough voltage on +/- 12v rail ? Forum23a on 12v Rail enough for 550 ti? Forum12v rail question Forum12.288 on + 12v rail ForumHow many amps do i have on my 12v rail ? Forum500w PSU More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !