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PSU Question here

LeaTheTechWoman
By LeaTheTechWoman
in Power Supplies
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Posted

Lets say i brought 2 GTX 980 but i have a 500w PSU but i need 550w power to power all the system up like motherboard fans gpu

 

BAT (But)

 

Can i Go BEYOND ​(WOOSH) the specification of the PSU to power up the System

 

Will i broke the PSU, Void the warranty etc  

 

 

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You won't break the PSU, you will just get a lot of BSODs and crashes under load 

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it wont output the power and you will be fucked

My Rig  

 
PCPartPicker part list: http://ca.pcpartpicker.com/p/kGNksY

 

CPU: Intel Core i7-4770 3.4GHz Quad-Core Processor  ($379.00 @ shopRBC) 

CPU Cooler: RAIJINTEK THEMIS 65.7 CFM Sleeve Bearing CPU Cooler  ($34.99 @ NCIX) 

Motherboard: MSI CSM-H87M-G43 Micro ATX LGA1150 Motherboard  ($78.83 @ DirectCanada) 

Memory: Kingston HyperX 16GB (4 x 4GB) DDR3-1600 Memory  ($139.99 @ Memory Express) 

Storage: Kingston Fury 120GB 2.5" Solid State Drive  ($71.34 @ DirectCanada) 

Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive  ($92.95 @ Vuugo) 

Video Card: Gigabyte Radeon R9 280X 3GB Video Card  ($298.98 @ Newegg Canada) 

Case: Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case  ($125.98 @ Newegg Canada) 

Power Supply: Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply  ($66.99 @ NCIX) 

Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit)  ($116.00 @ shopRBC) 

Case Fan: Cougar Turbine 120 (4-Pack) 60.4 CFM 120mm  Fans  ($23.99 @ NCIX) 

Monitor: HP 22xi 60Hz 21.5" Monitor  ($187.11 @ Amazon Canada) 

Monitor: HP 22xi 60Hz 21.5" Monitor  ($187.11 @ Amazon Canada) 

Keyboard: Logitech G710 Wired Gaming Keyboard  ($114.99 @ NCIX) 

Mouse: Razer DeathAdder 2013 Wired Optical Mouse  ($76.99 @ Amazon Canada) 

Headphones: Kingston HyperX Cloud Pro Headset  ($78.98 @ DirectCanada) 

Total: $2074.22

Prices include shipping, taxes, and discounts when availableGenerated by PCPartPicker 2015-04-10 15:33 EDT-0400Build log http://linustechtips.com/main/topic/303263-the-dell-from-hell/#entry4121100 

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Posted

Pulling more power from a PSU than it is rated for is a surefire way to blow it up. :blink:

That explains why my house caught fire while i was gone

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Pulling more power from a PSU than it is rated for is a surefire way to blow it up. :blink:

Only if the psu is bad. A good psu should just shut down when it can't output any more power.

I wouldn't recommend running 2 980's off of a 500w--I doubt there would even be enough pcie connectors for them. 

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
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Only if the psu is bad. A good psu should just shut down when it can't output any more power.

I wouldn't recommend running 2 980's off of a 500w--I doubt there would even be enough pcie connectors for them. 

If the system tries to draw way more power than the PSU can output it can blow the main capacitor. I've seen it happen with a platty-rated Seasonic before.

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If the system tries to draw way more power than the PSU can output it can blow the main capacitor. I've seen it happen with a platty-rated Seasonic before.

That may be true but a 980 sli shouldn't draw way more power.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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Most quality PSUs can go up past their nominal wattage by ~10% from what I've seen. However, it's definitely not recommended as you're putting loads and stresses that your PSU was never designed for. At stock settings, you're borderline with a 500W PSU. But if you can afford 980 SLI, you can afford a new PSU.

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Whether or not you can exceed what the unit is rated for will depends on the unit in question. A good PSU will have an engineering overhead. Some greater than others. For example, the Antec Signature 650w is capable of outputting over 800w while still remaining well in ATX specification. A Super Flower Golden Silent unit is a 500w platinum unit, but it can function as a 600w Gold unit (it is advertised to due so).

 

Of course, if it is an entry level PSU like the Corsair CX500, Seasonic S12II-B 520w, etc., I would not advise against it.

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