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can i use a min 500w gpu with my antec 450w psu?

post #1 of 10
Thread Starter 
i have http://www.newegg.ca/Product/Product.aspx?Item=N82E16817371045

can i use a gpu that says uses 500w minimum ? if not how many watt psu should i get to power a 500w gpu and other components comfortably
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post #2 of 10
What GPU are you trying to use? What is the rest of the system you're trying to use it in?
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post #3 of 10
Depens on the GPU if its a 7950 then you pushing the PSU right up to its limits and thats not a good idea if its a older PSU
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post #4 of 10
Thread Starter 
this gpu

http://www.amazon.ca/gp/product/B00752QYLK/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A3DWYIK6Y9EEQB

i'm basically getting it for free and it's for the system in my sig (old **** crappy system) gpu will be bottlenecked as HELL but it will do for now until i build another pc soon
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80 GB Western Digital Thermaltake GunMet Orb MS Windows 7 Ultimate 64-bit Acer S230HL 
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Allied SL-8360BTX ATX 350w Antec 300 
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AMD Athlon 64 3000+ K8 Combo-Z 256MB ATI Radeon 9550 / X1050 Series 1 GB 
Hard DriveOptical DriveOSMonitor
80 GB Western Digital OPTORITE CD-RW MS Windows XP Professional 32-bit SP3 Acer S230HL 23-Inch 
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Orion YH-480w 
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Intel i5-4670K MSI Z87-G45 MSI GTX 760 TF 2GD5 8GB G.SKILL Trident X DDR3-2400 
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Seagate Barracuda 500GB Cooler Master Hyper 212 EVO Microsoft Windows 10 Acer S230HL 23" 
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post #5 of 10
It would be perfectly sufficient wattage wise, but since the PSU is divided into 2x 18A rails I'm not so sure if that would work out. I'd probably get a new single rail 500W PSU.
Edited by Fulvin - 4/3/13 at 5:50am
post #6 of 10
Umm.. it's not a bad PSU.. But, to power a 7970 and the system.. Don't think I would do it. And that PSU only has one PCIE 6 pin connector. If it does work, your PSU will be at its limit for sure!
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post #7 of 10
You sould not do it you would put near 90-100% load on the PSU and it would not live long under that kind of load

Worst case it would blow and maybe even take your brand new video card with it
Edited by shilka - 4/3/13 at 6:13am
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Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
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LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
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post #8 of 10
you'll be at it's limits with a 400W, a 450W is fine. Mind what ep45-ds3l said.

if you can't plug it entirely without using some crappy molex-adaper then the PSU might not be fit.
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post #9 of 10
Quote:
Originally Posted by shilka View Post

You sould not do it you would put near 90-100% load on the PSU and it would not live long under that kind of load
That is only a concern for lower quality PSU's. Take a Seasonic for example or any other quality enthusiast power supply for that matter, and you will face no problems running it at it's rated capacity. Even while this particular PSU is a budget one, it is rated for continuous power regardless and is quoted as a solid unit in the reviews i have read, which makes me highly doubt it couldn't handle a single GPU setup that would draw under 300W, such as the system in question.

Although, the 2x 18A rail configuration seems a bit sketchy and might be a problem, so i recommend you start to look for a new PSU.
Edited by Fulvin - 4/3/13 at 7:56am
post #10 of 10
First off that's not a 450W PSU, it's overrated and it's rather poor(ish)... it's a No PFC, group regulated, <400W unit (by current standards).. a bottom of the barrel FSP design. If that was a quality 450W unit (Rosewill Capstone, Seasonic G series, etc).. it would have been quite plenty.... however, this units is not designed to tackle such draws (the 7970s can be a power pig).
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