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What wattage PSU should I buy?

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January 17, 2014 11:25:36 AM

I have the Intel i5 4670k, AMD Radeon R9 270X GC, Asus Maximus Hero VI MB, 16 GB RAM, 240GB SSD Vector 150, Asus DVD drive. Any ideas or help would be much appreciated. If I forgot to mention anything important I will let you know.

More about : wattage psu buy

January 17, 2014 11:37:08 AM

I'd get a 600w psu with 2 x 6-pin. It will leave you some power for future upgrades. Modoluar psus help with cable management, so it helps a lot with the air flow inside the case.
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a b ) Power supply
a b À AMD
a b Ĉ ASUS
January 17, 2014 11:47:34 AM

550-600w PSU is enough, If you have the $89 or so to spend, newegg has a sale this weekend on the Corsair HX750 semi modular psu which is 80+ Gold rated and has 7 year warranty. $89 after rebate.
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January 17, 2014 11:51:04 AM

My PSU philosophy isn't shared by many on this board but since you asked I'll tell you. IMHO, you should buy the highest wattage QUALITY PSU you can afford. Personally, I try never to run my PSUs over 50% of their rated capacity. Yes, you will pay more for the PSU but it will cost you no more to run than if you bought one that was barely big enough as most do. I consider the expense an insurance policy. Running any electrical component at or near capacity stresses the component and stress shortens life expectancy. It's like running your car in first gear. FWIW, I prefer Seasonic.
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January 17, 2014 11:56:45 AM

ram1009 said:
My PSU philosophy isn't shared by many on this board but since you asked I'll tell you. IMHO, you should buy the highest wattage QUALITY PSU you can afford. Personally, I try never to run my PSUs over 50% of their rated capacity. Yes, you will pay more for the PSU but it will cost you no more to run than if you bought one that was barely big enough as most do. I consider the expense an insurance policy. Running any electrical component at or near capacity stresses the component and stress shortens life expectancy. It's like running your car in first gear. FWIW, I prefer Seasonic.


But let's suppose he's not going to go for SLI / Crossfire, and he doesn't want to buy high end cards in the future. An ultra high wattage psu (1200-1600w) will perform less efficiently than a "regular" psu (550-850w) on his rig. Though I agree with you on getting the best quality possible psu.
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a b ) Power supply
January 17, 2014 12:08:23 PM

JetPilot0721 said:
I have the Intel i5 4670k, AMD Radeon R9 270X GC, Asus Maximus Hero VI MB, 16 GB RAM, 240GB SSD Vector 150, Asus DVD drive. Any ideas or help would be much appreciated. If I forgot to mention anything important I will let you know.


Keep in mind that this machine, unless heavily overclocked, will probably be using a good bit less than 300 watts to run at it's peak (from the wall, probably less than 250 watts actually consumed by the PC). You could pretty much run it on any quality 500 watt supply easily. I do however think that just in case you decide to switch up hardware in the future to something more demanding that you probably want to shoot for something in the 550-600 watt range, and would also like to point out that you should be just shopping for quality over capacity in most cases.

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a b ) Power supply
January 17, 2014 1:45:18 PM

HumdrumPenguin said:
ram1009 said:
My PSU philosophy isn't shared by many on this board but since you asked I'll tell you. IMHO, you should buy the highest wattage QUALITY PSU you can afford. Personally, I try never to run my PSUs over 50% of their rated capacity. Yes, you will pay more for the PSU but it will cost you no more to run than if you bought one that was barely big enough as most do. I consider the expense an insurance policy. Running any electrical component at or near capacity stresses the component and stress shortens life expectancy. It's like running your car in first gear. FWIW, I prefer Seasonic.


But let's suppose he's not going to go for SLI / Crossfire, and he doesn't want to buy high end cards in the future. An ultra high wattage psu (1200-1600w) will perform less efficiently than a "regular" psu (550-850w) on his rig. Though I agree with you on getting the best quality possible psu.


Well, first of all, the term "ultra high wattage" is your terminology, not mine. That is not what my recommendation means at all. What I did say is that I try never to exceed 50% load. If you do that, any PSU you use will be in the middle of it's efficiency range no matter if it's SLI, CROSSFIRE or whatever. It's my experience that most people try to buy the smallest PSU they can justify. That's wrong, IMHO. Any extra wattage you have is a stress buffer. Stress and the ensuing heat is what kills PSUs (and any electronic component) prematurely.
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a c 1955 ) Power supply
a c 354 À AMD
a c 276 Ĉ ASUS
January 17, 2014 6:36:33 PM

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)
Total: $59.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-17 21:36 EST-0500)
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