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Old December 22, 2011, 02:34 PM
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Default new PSU and possibly GPU

current specs:
hd4890
i5 760
4gb DDR3 ram
gigabyte p55a-ud3

I'm looking for a new PSU since my current HX520W has been making some weird noises and I need more power for future expansion. I've narrowed it down to the Corsair AX750 since that'll give me plenty of power for when I get Crossfire but I've noticed that the AX850 is cheaper. Should I get that instead? I wouldn't be wasting power or anything right?
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Old December 22, 2011, 04:45 PM
KaptCrunch's Avatar
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old is only 18A not enough for dual cards

80 Plus Gold fits the bill for dual cards
plus
Active Power Factor Correction (PFC) with PF value of 99%

but 750 is min for a bare system, i'd shoot for 850-950 but 1k for big gpu's

Last edited by KaptCrunch; December 22, 2011 at 04:53 PM.
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Old December 22, 2011, 05:10 PM
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doesn't amd have an option for power consumption like NCP? I would think that it should. also really depends what kind of cards you're going to be crossfiring for mid range cards like 6950 a 750w is plenty but going higher tier like 6970 obviously you're gonna need more especially when you're gonna oc. for high end cards you're gonna need 1k+ of wattage. so for future proof's sake get the 850w, especially if it's cheaper.
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Old December 22, 2011, 05:34 PM
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My System Specs

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check this one .you will like it
Newegg.ca - XFX PRO850W XXX Edition Semi-Modular 80 Plus Silver Certified 850 Watt Active PFC Power Supply
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Old December 22, 2011, 05:56 PM
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I'd go with the AX850 as well since its cheaper than the 750 for whatever reason.
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Old December 22, 2011, 09:11 PM
NI3 NI3 is offline
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You only pull from the wall what your components need.

You will be pulling the same from the wall with your 550 as you are with the 750, or 850. However, the efficient the PSU is may affect that but it is negligible.
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