Power requirement is close to Power Supplier limit

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Nikita Maximov

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Jan 9, 2014
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Hi, I'm building my first computer, and I have changed my video card, which requires more power than the previous one, however I already got myself a 650W Power Supplier. With the previous video card the power requirement was around 550W, whereas with this one it's around 620W

My System's Hardware:
Intel Core i7 4770K overclocked to 4.2GHz
Gigabyte Z87-HD3 (Socket 1150) DDR3 Motherboard
RAM: Kingston Genesis 16GB 1600MHz Dual Channel (4 sticks)
Akasa Nero 3 V2 CPU Cooler
Sapphire Radeon R9 280X Dual-X OC 3072MB GDDR5
Samsung 840 Series Pro 256GB 2.5 inch SATA Solid State Drive
Western Digital 1TB internal Hard Drive
Asus DRW-24B5ST 24x Internal SATA DVD Drive
Corsair Enthusiast Series TX650 V2

So I'm wondering if my power requirement would be below 650W (Something like 620W), and if it's ok to have power requirement just below the power supplier's power
 
Solution
AlexSmith96
With that build I would go with atleast a 750 watt quality PSU. You are underpowering the machine. It may lead to 'death of PSU' and all other components.
My suggestion - Seasonic X- Series 750 watt 80 + Gold PSU (fully modular).
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AlexSmith96

AlexSmith96

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Mar 26, 2013
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With that build I would go with atleast a 750 watt quality PSU. You are underpowering the machine. It may lead to 'death of PSU' and all other components.
My suggestion - Seasonic X- Series 750 watt 80 + Gold PSU (fully modular).
 
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AxlFone

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May 21, 2013
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Better take 800w psu.
This is best psu near 100$ price now.
http://pcpartpicker.com/part/rosewill-power-supply-lightning800
Read jonnygyru review of this psu.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=258

I do not know how good is akasa cooler so this is sura thing. Good and silent cooler.
http://pcpartpicker.com/part/thermalright-cpu-cooler-macho120


If you want to save cheaper SSD is sandisk ultra plus 256GB.
http://pcpartpicker.com/part/sandisk-internal-hard-drive-sdssdhp256gg25
Not much slower than samsung pro. And reliability is good. You will not notice any speed diffrence by using SSD.

And Id look for G.skill memory. Better buy is 1866 or 2133MHz memory. 2400MHz is good. And better is buy two stick kit than four stick kit.
 
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laviniuc

laviniuc

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Nov 29, 2013
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sapphire recommends a 750W psu for the graphics card, but i would say if the current psu has a 8 pin and a 6 pin power connector and if it is 80+ certified and from a good brand you'll be fine.

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard.
2X75 Watt 6-pin PCI Express power connector is required for CrossFireX™ system.
1X75 Watt 6-pin PCI Express power connector is required.
4096MBMinimum of system memory.
Installation software requires CD-ROM drive.
DVD playback requires DVD drive.
Blu-ray™ / HD DVD playback requires Blu-ray / HD DVD drive.
750 Watt Power Supply is required.
1000WattPower Supply is recommended for CrossFireX™ System.
1X150 Watt 8-pin PCI Express power connector is required.
2X150 Watt 8-pin PCI Express power connector is required for CrossFireX™ system.

edit: read the post again, if you're overclocking you're definitely well over 650W so i'd say you need a new psu. recommendations from above are great.
 
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laviniuc

laviniuc

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Nov 29, 2013
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+1 agreed

but in interest of fairness, when used on low wattage compared to max the psu-s are less efficient at converting the power. so a 1000W psu used at 30% - 300W will draw more power from the wall compared to a 500W used at 60%
(even if both are same cert. level) the 80+ is granted based on usage on the 50-90% usage interval if i remember well. and the efficiency for psu-s is a graph that looks like this:
http://www.hardwaresecrets.com/fullimage.php?image=10583
 
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todd1780

todd1780

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Dec 29, 2012
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I have to agree. I think you will be fine with your current power supply assuming its a reliable brand. If your only looking at wattage then you don't get the entire picture.
On a good power supply you can run that setup on a 600w PSU if you have the proper current on your 12 volt rail.
Wattage is good to know but the amount of current that your PSU can supply to your components is equally important.
 
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AxlFone

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May 21, 2013
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markaflias

markaflias

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Take a look :

http://www.guru3d.com/articles_pages/gigabyte_radeon_r9_280x_windforce_review,8.html

Our test system is based on a power hungry six-core Intel Core i7-3960X Extreme Edition Sandy Bridge-E based setup on the X79 chipset platform. This setup is overclocked to 4.60 GHz on all cores. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). We'll be calculating the GPU power consumption here, not the total PC power consumption.

Conclusion :
AMD R9 280X - On your average system the card requires you to have a 550 Watt power supply unit.
AMD R9 280X Crossfire - On your average system the cards require you to have a 750 Watt power supply unit as minimum.


 
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Nikita Maximov

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Jan 9, 2014
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Jesus, I only just returned from my lectures, which i only had for 2 hours, and I got so many replies, wow! Anyway thank you very much guys, especially to AlexSmith96, I have decided to go with his suggestion, even tho in UK computer components cost nearly twice than in US, due to the stupid TAX here. Anyway, thank you all so much, I hope I can start building my dream machine soon =)
 
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