Computer won't turn on with GTX 670

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Jeremy Rosenblum

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May 25, 2013
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My problem is pretty straightforward. Basically, I want to upgrade from my old 550 ti to the 670. First, I plugged in the P11 cable, but forgot to plug in the P3. When I booted it up, I got a message saying I needed to plug in the P3. No problems so far. I plug in the P3, and then my computer won't turn on at all. Only when the P3 cable is plugged in though. I plugged my old card back in and it works fine, so I didn't accidently unplug something during the card transfer. I have all the required specs to use this card (600W power supply) but for some reason, my computer just refuses to turn on with it. Any help would be appreciated
 
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Fulgurant


Ok, this is what comes up for me when I look up your model number: http://www.techsupportforum.com/forums/f210/help-with-new-graphics-cards-psu-673702.html

These are the specs, according to that thread:

"12Va --- 16A
12Vb ---18A
12Vc ---12A
12vd---10A
5.08v----16A
3.3v ----15A
5.08Vsb ----2A
-12V ---.3A"

If the power supply genuinely has four separate 12V rails, then that could be your problem; perhaps you're overloading one of them. Or maybe the PSU is failing. Sometimes PSU manufacturers claim that there are separate 12V rails when there really aren't. Dunno.

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Jeremy Rosenblum

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My power supply has 600W though. That should be more than enough to support the 670. Besides, people with the exact same computer as me have told me they've run 680's fine with it. It seems like a weird isolated problem for me
 
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jnkweaver

jnkweaver

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Except it doesn't list the power supply. Doesn't even mention it. Most likely Swifty is on the right track. The 550TI needed a 400W supply and the 670 needs a good 500W supply. You will most likely need a better power supply. Preferably Antec, Corsair, Seasonic, or XFX.
 
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Fulgurant

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It should. There should be a sticker somewhere on it that looks something like this:

ps_sticker.jpg


Note: the image above is by no means an endorsement of Cooler Master power supplies!!!
 
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Fulgurant

Fulgurant

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Ok, this is what comes up for me when I look up your model number: http://www.techsupportforum.com/forums/f210/help-with-new-graphics-cards-psu-673702.html

These are the specs, according to that thread:

"12Va --- 16A
12Vb ---18A
12Vc ---12A
12vd---10A
5.08v----16A
3.3v ----15A
5.08Vsb ----2A
-12V ---.3A"

If the power supply genuinely has four separate 12V rails, then that could be your problem; perhaps you're overloading one of them. Or maybe the PSU is failing. Sometimes PSU manufacturers claim that there are separate 12V rails when there really aren't. Dunno.



The install disk is just software -- drivers for the GPU, and whatever extra control panel/tweaking software. Don't worry about that until you can get the machine to boot and to recognize the card. ;)
 
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Solution
Fulgurant

Fulgurant

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A GTX 670 ought to draw a max of 162 to 180W at stock settings. So any of the 12V rails listed above would be cutting it close, with 12Vb being your best option. And needless to say, you wouldn't want your CPU to go on the same rail with the GPU.

Personally, if I were you, I'd just go ahead and buy a new power supply from a reputable manufacturer. I prefer Seasonic. Whether the PSU is the exact cause of your current problem or not, you should probably buy one anyway.

Also, if you still have time to RMA your GPU, you'll want to rule out the PSU as quickly as possible.
 
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Jeremy Rosenblum

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Thanks for the info. I'm a total noob when it comes to this kind of stuff. how much would one of those PSu's cost? I kinda spent all my money on the new card lol
 
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Fulgurant

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Anytime man. The power-supply industry goes out of its way to mislead and confuse people, frankly. How much for a ~600 Watt Seasonic PSU? Oh, probably about $80. Lemme see ... Yep. This'd work: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151119

You can probably find one a little cheaper. Seasonic actually makes PSUs for a couple of different brands, but you have to be careful to check for reviews from reputable sites when you go too far afield. Me? I'm a shameless Seasonic fanboy. Have used them exclusively for about 15 years. There are other decent brands out there, though.



What this guy said (and as it happens, the linked PSU above has exactly 45A on 12v :) ).
 
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Fulgurant

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Good call. That one's also manufactured by Seasonic, I think. :)
 
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jnkweaver

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It is as is the more expensive Corsairs, about a third of the Antecs and the some Rosewill series. http://www.tomshardware.com/reviews/power-supply-oem-manufacturer,2913-4.html
 
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