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psu dual 12v rails

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Last response: in Components
September 13, 2013 7:55:09 AM

I just installed a 550 ti and am getting black screen of death during gaming. Other research has pointed to either overheating or not enough power.

I have a 700watt PSU with dual +12v rails. Specification says 21A on them. However the card demands 24A

I don't fully understand the whole Amperage thing here. Does 2x21A give me around 40A or is it just putting out (in theory) 21A?

I'm using a converter for the card's 6 pin that requires 2 Molex. I'm not certain if its possible to use a molex from both or 1 rail? The cables from the molex seem to originate from same place and it appears that there's another bunch of cables coming from another position off the psu. Would I be better using power from 2 separate cable bunches? Or is it not going to make a difference as my amperage is already too low?

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September 13, 2013 11:02:59 AM

Please post the make and model of the PSU.
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September 13, 2013 3:59:02 PM

Why are you using the molex adapter when there is a 6-pin plug coming from the PSU?
September 14, 2013 1:29:57 AM

The PSU came with an adaptor (Older model than one shown but identical stats across the board) there isn't one connected directly to the Power Supply Unit.