Testing a 970 on a 280 Watt PSU?

I3I5I7

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PCPartPicker part list: http://pcpartpicker.com/p/BYFbgs
Price breakdown by merchant: http://pcpartpicker.com/p/BYFbgs/by_merchant/

CPU: Intel Core i5-4590 3.3GHz Quad-Core Processor ($160.00)
Motherboard: ASRock B85 Anniversary ATX LGA1150 Motherboard ($62.99 @ SuperBiiz)
Memory: Kingston HyperX Fury Blue 8GB (2 x 4GB) DDR3-1600 Memory ($43.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.88 @ OutletPC)
Video Card: EVGA GeForce GTX 970 4GB Superclocked+ ACX 2.0 Video Card ($250.00)
Case: Corsair 200R ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: EVGA SuperNOVA GS 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($59.99 @ NCIX US)
Total: $676.84
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-08-17 14:06 EDT-0400

Ok, about to order all those parts once I get my next paycheck in a week. I already ordered the EVGA GeForce GTX 970 Superclocked+ ACX 2.0 because it was a $100 cheaper limited supply B-Stock. That is arriving tomorrow. I was going to check to make sure it functioned and what not before the other parts arrive. However, my old pc only has a 280 watt PSU. It does have a pcie x16 slot on the mobo. So, my main question for this post is if it would be alright to test the new gpu on that psu just to make sure everything is functional. It has an A8-5500 CPU. Here is the exact one if you need more info: http://www.walmart.com/ip/Lenovo-Black-H535-Desktop-PC-with-AMD-A8-5500-Processor-6GB-Memory-1TB-Hard-Drive-and-Windows-8.1-Monitor-Not-Included/37388776
If there is anything else you think I should change for my pc, please tell me!

Thanks everyone!
 
Solution
Don't try it. Using a GTX 970 on a 280 W psu (probably not the highest quality) wouldn't be wise. Specification says at least 500 W. Important is the 12v rail of the psu and that would be 100% sure not enough. You don't know how it affects your system and if you are unlucky, it could damage something on your new rig, in example the motherboard or the graphics card itself. When I brought the GTX 970, I could use it with my good quality 400 W psu. I did it for 3-4 weeks and sometimes (but seldom) crashes on gaming. Even this is not recommended. Just wait until you get the appropiate hardware.

turbopixel

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Don't try it. Using a GTX 970 on a 280 W psu (probably not the highest quality) wouldn't be wise. Specification says at least 500 W. Important is the 12v rail of the psu and that would be 100% sure not enough. You don't know how it affects your system and if you are unlucky, it could damage something on your new rig, in example the motherboard or the graphics card itself. When I brought the GTX 970, I could use it with my good quality 400 W psu. I did it for 3-4 weeks and sometimes (but seldom) crashes on gaming. Even this is not recommended. Just wait until you get the appropiate hardware.
 
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