Difficult PSU questions.

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kyle382

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Jun 15, 2010
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Surprise, my corsair 750w died. I am having a hard time choosing which PSU to get. I really wanted a 550watt psu to save money on idle power consumption and initial unit price. Now I am learning I need a 750watt at least since PSU are TYPICALLY most efficient at 35%-60% load? That's fine, but in late 2014/early 2015 I will be getting all new pc components that will likely use less wattage due to shrunk cpu and gpu dies etc. I only ever want to use single GPU setups, so will Maxwell and haswell not be significantly lower powered compared to my sandybridge/kepler build? Would reading tea leaves be easier than predicting this? If the power requirements will be similar, then I would lean towards the seasonic x-750, BUT from what I can tell these units were designed in 2009 or 2010? That's ancient for a pc component. Are the new xfx xtr PSU's really just rebranded 2010 psu's with a better fan? SUPREME extra credit for answering 3+ of my paranoid questions.
 
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HiTechObsessed
Actually, Haswell and uses more power than the last generation lol

What is the build you have, and do you ever plan on adding multiple graphics cards? A 550-650w PSU is perfect for any system running a single graphics card, even when overclocking.

You're not going to have any noticeable savings on your electric bill from running some at 5-10% better efficiency, which is really all you'd see at the most in what you're describing anyway, unless you're doing something like folding at home or mining.

Maxwell will definitely use less power (as we've seen with the 750 Ti) but my prediction is you will have the same power draw with the higher end cards (around 250w or so TDP), just more performance.

Anything you buy from XFX or SeaSonic...
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enemy1g

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Oct 3, 2013
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A list of your current system specs would help; but generally under full load, even with a GTX 780 Ti, your system will only need a ~600W PSU at the most. If you're planning on overclocking, a 650W will do. XFX, Corsair AX/HX/TX, and SeaSonic are all well built PSUs.
 
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HiTechObsessed

HiTechObsessed

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Dec 3, 2013
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Actually, Haswell and uses more power than the last generation lol

What is the build you have, and do you ever plan on adding multiple graphics cards? A 550-650w PSU is perfect for any system running a single graphics card, even when overclocking.

You're not going to have any noticeable savings on your electric bill from running some at 5-10% better efficiency, which is really all you'd see at the most in what you're describing anyway, unless you're doing something like folding at home or mining.

Maxwell will definitely use less power (as we've seen with the 750 Ti) but my prediction is you will have the same power draw with the higher end cards (around 250w or so TDP), just more performance.

Anything you buy from XFX or SeaSonic (and most of Antec) will be extremely well made. They usually have 5 year warranties on them as well, and SeaSonic/XFX customer support is great.

When can I expect my extra credit :p
 
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