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Title: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: Transisto on August 16, 2011, 02:57:05 AM I can't count the number of time I had to do this.
Reroute the 4pin into PCI-e. That PSU, PowerColor 500w, dedicate a whole 18amp for the CPU https://i.imgur.com/1HvAdl.jpg https://i.imgur.com/1HvAd.jpg Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: haploid23 on August 16, 2011, 03:08:19 AM this was something i was thinking about doing, but wasn't sure if it's safe for the PSU or video card, and i also didn't know the pin assignments. can you show which CPU cable pins to go into which pci-e cable pins?
Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: Transisto on August 16, 2011, 03:27:31 AM Well ,,,
Black = ground Yellow = 12v Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: kripz on August 16, 2011, 09:30:05 AM I dont get it, what's wrong with an adaptor that you get when you buy the video card?
Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: haploid23 on August 16, 2011, 09:58:05 AM I dont get it, what's wrong with an adaptor that you get when you buy the video card? that adapter that comes with the video card pulls power from a peripheral cable, which is probably a different power rail than the CPU power rail on a multi rail PSU. you want to take advantage of the CPU's rail as well since the CPU (for dedicated miners) shouldn't be pulling that much power.Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: plastic.elastic on August 16, 2011, 02:56:49 PM I can't count the number of time I had to do this. not sure if i see it right,but you tap the p4 wire?Reroute the 4pin into PCI-e. That PSU, PowerColor 500w, dedicate a whole 18amp for the CPU https://i.imgur.com/1HvAdl.jpg https://i.imgur.com/1HvAd.jpg Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: Transisto on August 16, 2011, 03:16:16 PM not sure if i see it right,but you tap the p4 wire? Using the 2nd 4pin for the CPU is never a requirement unless you plan on going 100w + (miners use Celerons and 25w cpu of the like.) I have a few 4pin grabbed from dead PSUs that I sometime plug with a molex to power the CPU. This way I can use the whole 8pin and use them as PCI-e ,,, I am now to use a tool to make custom pci-e without any tampering to the PSU. (warranty safe) Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: plastic.elastic on August 17, 2011, 04:15:19 PM not sure if i see it right,but you tap the p4 wire? Using the 2nd 4pin for the CPU is never a requirement unless you plan on going 100w + (miners use Celerons and 25w cpu of the like.) I have a few 4pin grabbed from dead PSUs that I sometime plug with a molex to power the CPU. This way I can use the whole 8pin and use them as PCI-e ,,, I am now to use a tool to make custom pci-e without any tampering to the PSU. (warranty safe) I understand that, but how did you use your 8pin EPS rail? you tap your PCI-E on it or did you use an adapter 8pin EPS -> PCI-E connector. Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: Transisto on August 17, 2011, 11:48:21 PM Stripping the insulation ~1 cm and twisting the other wire on it.
Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: kripz on August 18, 2011, 03:24:49 AM Ah i get it now.
How do you know if the PSU reserves a rail for the CPU? Do you ahve to open it? Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: vapourminer on August 20, 2011, 01:23:22 PM the PSU manual may specify what strings are on what rail.
for example my antec TP 550 new manual (pdf link (http://www.antec.com/pdf/manuals/TP-550_Manual_EN.pdf)) tells exactly whats on what. Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: pekv2 on August 20, 2011, 04:26:48 PM Why not stay away from multi rail psu's? Only buy single rail psu's?
Title: Re: Sucking precious power out of Multi-Rails PSU. (PIC) Post by: vapourminer on August 20, 2011, 07:30:04 PM there are pros and cons to each.
multi rail: Pro - overcurrent protection on each rail. a short on one string (rail) will shut the PSU down before the string wiring can catch fire. multi rail: Cons - have to balance the rails single rail: Pros - no load balance worries. jump start your jeep! single rail: Cons - fire if something shorts big time.. 100 amps on a single wire = bad news. BTW internally most all "multi rail" PSUs have one 12v source (which also powers 3.3v and 5v rails), each rail has overcurrent protection though. |
