r_avital
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Hello,
I have a really, really silly question, out of sheer ignorance. I've built several PCs successfully, but I'm no professional builder or modder by any stretch.
I just got a new evga-gt-640, to install on an Asus Sabretooth X58 mb. The box for this card reads (on the side): "requires 350 Watt or greater power supply with a minimum of 20A on the 12-volt rail."
So far so good, my PSU is a modular 750 Watt, with an output of 70A on the +12-volt rail.
So I know that the card will not starve for power, but what does that mean in terms of connections?
I'm reading the PDF manual on the CD that came with the EVGA card, it's "generic" and not for this specific card. It does mention: "If your graphics card is equipped with a supplemental power adapter, it is required that it be connected at the time
of installation."
I've turned the card around looking at it from all directions, I see no separate power connector. Does that mean I don't need to worry about using that 12-volt rail on this card, and use it on some other component if it needs it?
Alternately, do some motherboards have a separate power connector to power the PCIE slots, and does this card require such a MB?
Sorry again for the noob questions, and thanks in advance.
Cheers
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bdary
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Re:Powering an EVGA card correctly?
2013/07/04 08:05:23
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r_avital
Hello,
I have a really, really silly question, out of sheer ignorance. I've built several PCs successfully, but I'm no professional builder or modder by any stretch.
I just got a new evga-gt-640, to install on an Asus Sabretooth X58 mb. The box for this card reads (on the side): "requires 350 Watt or greater power supply with a minimum of 20A on the 12-volt rail."
So far so good, my PSU is a modular 750 Watt, with an output of 70A on the +12-volt rail.
So I know that the card will not starve for power, but what does that mean in terms of connections?
I'm reading the PDF manual on the CD that came with the EVGA card, it's "generic" and not for this specific card. It does mention: "If your graphics card is equipped with a supplemental power adapter, it is required that it be connected at the time
of installation."
I've turned the card around looking at it from all directions, I see no separate power connector. Does that mean I don't need to worry about using that 12-volt rail on this card, and use it on some other component if it needs it?
Alternately, do some motherboards have a separate power connector to power the PCIE slots, and does this card require such a MB?
Sorry again for the noob questions, and thanks in advance.
Cheers
If you don't see any 6 or 8 pin power connectors, then that card doesn't require the additional power and it will be supplied by the pcie slot itself. I have an old GT 430 that is the same way. As far as using the PCIe power cables for the PSU, they are only for GPU's and would not be needed or used for anything but GPU's.
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rjbarker
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Re:Powering an EVGA card correctly?
2013/07/04 09:02:49
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Also, yes....some Mobo's do have an additional Power connector strictly for PCI-E, either by a 6pin PCI-E connector or a Molex connector. These are generally only required for high power multi GPU configurations.
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lagittaja
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Re:Powering an EVGA card correctly?
2013/07/04 09:39:19
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And here's a picture of such if someone is wondering the hell is that. The 6pin in the first picture right next to the mosfet heatsink and first PCI-e x16 slot. And the second image is pretty self explanatory, a molex right next to a PCI-e x16 slot.   I'd say those are only needed for LN2 benching for really high end cards.
post edited by lagittaja - 2013/07/04 09:41:43
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rjbarker
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Re:Powering an EVGA card correctly?
2013/07/04 12:48:50
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^^^^ Actually you'd be wise to hook em up when running Tri SLi (no LN2 required).....
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r_avital
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Re:Powering an EVGA card correctly?
2013/07/05 11:23:48
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Wow! Thank you all so much! Definitely answered all my questions! The only thing that's puzzling, is why they list the 12v rail with xx amp requirement, if it's not needed...
post edited by r_avital - 2013/07/05 11:30:13
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NordicJedi
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Re:Powering an EVGA card correctly?
2013/07/05 12:13:47
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The minimum PSU requirements listed by Nvidia are for your entire system, not just the video card. While the PSU does not directly connect to the video card, the video card still draws power directly through the PCI-e slot on the motherboard, whether or not the card is directly connected to the PSU. The PCI-e slot is powered through the 24-pin power connector on the motherboard (not including supplementary connectors provided on some motherboards, as laggitaja showe), so the card will still be drawing from the 12v. rail on the power supply. Moreover, that xx amp requirement is for the combined 12v. on the psu; not just one connector. Essentially, the card will be pulling from the 12v. rail, regardless of PEG connectors or not.
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r_avital
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Re:Powering an EVGA card correctly?
2013/07/05 19:14:06
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Thanks, I was guessing in that direction. So I have nothing to worry about when I finally build it (just waiting on a case)
I have to say, thank G-d for gamers, and thank G-d I'm not one. I love the fact that gamers and other high-end graphics users have been driving manufacturers for more than 20 years now to come up with better technologies. But the encylopedic knowledge needed to stay on top of these innovations is more than I can handle.
Again, thanks everybody :)
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