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How much watt do I need?

This is a discussion on How much watt do I need? within the RAM and Power Supply Support forums, part of the Tech Support Forum category. Motherboard: Asus Rampage V Extreme Graphics card: GTX 980 RAM:Corsair Dominator DDR4 2800MHz 16GB (4x4GB) SSD: Samsung 850 pro 256GB


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Old 09-21-2014, 09:32 AM   #1
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Motherboard: Asus Rampage V Extreme
Graphics card: GTX 980
RAM:Corsair Dominator DDR4 2800MHz 16GB (4x4GB)
SSD: Samsung 850 pro 256GB
SSD: Crucial m4 SSD 2.5" 128GB
HD: Seagate Barracuda Green 2TB 3,5"
Processor: Intel core i7 5930k
CPU cooler: Corsair H105 Hydra Series CPU cooler
Fans: 2x 120mm + 1x 140mm (3 fans total)

Also got a keyboard, mouse and headset obviously..

I'm not saying I'm getting these parts, but I want to know how much Watt I would approximately need. I've tried Watt calculators but all of them are outdated and I can't find the parts.

Thanks in advance! :)
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Old 09-21-2014, 09:52 AM   #2
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Probably 650-700 watt PSU. Modern units get over 90% of wall current.
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Old 09-21-2014, 09:57 AM   #3
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Quote:
Originally Posted by Corday View Post
Probably 650-700 watt PSU. Modern units get over 90% of wall current.
Oh okay, but what is wall current?
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Old 09-21-2014, 10:00 AM   #4
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I got Cooler Master Silent Pro Gold 800W PSU, this would be good enough then?
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Old 09-21-2014, 11:12 AM   #5
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Hi there,

Go with Seasonic and XFX power supplies. Both brands make pretty good power supplies.
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Old 09-21-2014, 11:14 AM   #6
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Originally Posted by Martin9744 View Post
Oh okay, but what is wall current?
what comes out the socket on the wall in your house.
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Old 09-21-2014, 02:50 PM   #7
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Quote:
Originally Posted by DBCooper View Post
Hi there,

Go with Seasonic and XFX power supplies. Both brands make pretty good power supplies.
^ As above. Stick with XFX or Seasonic branded units.
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Old 09-21-2014, 04:31 PM   #8
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There are some online PSU calulators out there that will give you an idea about how much wattage you'll need.

eXtreme Power Supply Calculator

Cooler Master Power Supply Calculator

Newegg.com - Recommended Power Supply Calculator.

ASUSTeK Computer Inc. -Support- Recommended Power Supply Wattage Calculator

Since you all ready picked up one...this is kind of moot. At least you'll know where to go the next time you need to get one.
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Old 09-22-2014, 05:53 AM   #9
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The GPU is the major consumer of power. 500W is the minimum suggested for a GTX 980 GPU so a good quality 550W PSU would be sufficient.
CoolerMaster PSU's are not recommended.



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Old 09-22-2014, 07:02 AM   #10
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Quote:
I've tried Watt calculators but all of them are outdated and I can't find the parts.
I think you were wise to try a calculator. The problem going with what the GPU maker suggests is they are only guessing when it comes to the rest of your components. They have no clue how many, or what type RAM sticks you have, number of drives attached, fans, other expansion cards, and more. So they pick an arbitrary number based on what they think is the "average" system. And each GPU and graphics card makers have their own arbitrary numbers. Also, only you know if you might be adding more RAM, more drives, or a bigger or second graphics card in the next year or two. So you need to think ahead, and plan for any upgrades - if you want this PSU to carry you through.

I too recommend the eXtreme Calc, but sadly, and inexplicably, the GTX 980 is not listed (I have reported it, BTW). So you don't have much choice, but to go by the GPU maker's recommendation.

If you are not overclocking and not a hard core 3D animated gamer or do CAD/CAE work, then I agree a quality 550W supply should do. I would urge you to look for a supply from a reputable maker and that it is 80 PLUS certified to ensure at least an 82% "flat" efficiency rating across "all" realistic loads. I prefer Corsair, Seasonic, and Antec PSUs, but understand achieving a high, flat efficiency requires quality design, quality parts, and quality construction - regardless the brand name stamped on the case.

Note it is that "efficiency" rating others were referring to about wall current. What it means is with a PSU rated at 85%, for every 100 watts pulled from the wall, 15 watts will be wasted in the form of heat.

Unfortunately, there are MANY new, inexpensive PSUs on the market - including from reputable makers, that are NOT 80 PLUS Certified that may advertise 85 or 87% or higher efficiency rating. But if not 80 PLUS Certified, they likely achieve that high rating at just one load point (typical for basic, rudimentary power supplies). But we all know that computers present a variety of demands on PSUs from near nothing at idle, to 100s of watts when pushed. So get a supply with a "flat" efficiency curve across the full spectrum of "expected" loads to ensure your supply is delivering good, clean, stable power at all load levels.

The good news is that monster GTX 980 is less power hungry than many older less capable cards.
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Old 09-24-2014, 01:48 AM   #11
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Quote:
Originally Posted by Tyree View Post
The GPU is the major consumer of power. 500W is the minimum suggested for a GTX 980 GPU so a good quality 550W PSU would be sufficient.
CoolerMaster PSU's are not recommended.

I would not trust that, and I would go even beyond a 550. I would at the very least get a 650-750W PSU for that GPU. +100W for security and strong clean power, and +50 more watts for headroom. a 620 Seasonic should do ok as long as it's a 1HDD, 1SSD, 1GPU (GTX 980) system.
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Old 09-25-2014, 06:20 AM   #12
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The GPU chipset manufacturer says 500W minimum for a GTX 980. A top quality, SeaSonic-XFX-Antec HCG, 550W is would be sufficient. More won't hurt but would not be required.



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