Asus GTX 760 OC Mini with 450w PSU?

Elliott Veares · May 6, 2015

I have recently purchased a Asus Geforce GTX 760 DC Mini small form graphics card to replace the stock MSI GT630 card I have in at the moment.

New card: http://www.asus.com/uk/Graphics_Cards/GTX760DCMOC2GD5/

My system specs are currently: MSI B75MA-P45 Mother board, i7-3770 CPU, 16GB 1330Mhz DDR3 RAM, MSI 630GT graphics card, 2 Hard drives, 1 DVD-RW drive, and a generic 450w PSU.

Will my current PSU cope with the GTX 760?, or do I need to upgrade my PSU. If so what wattage PSU do I need?

Also what will happen if I try and run the GTX 760 on my current PSU?

clutchc · May 6, 2015

I wouldn't. Especially with a no-name PSU that came with the case. Even Nvidia recommends a 500W unit minimum for the stock version of that card.
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-760/specifications

Elliott Veares · May 6, 2015

So what wattage PSU should I go for then? Would a cheap 750w PSU do?

clutchc · May 6, 2015

Elliott Veares :

No. Nothing "cheap" will do. Cheap will kill your PC over time... or sooner. If you want to replace the PSU, let me know your max budget. I may be able to find a good quality low cost PSU for you.

Elliott Veares · May 6, 2015

Well I don't want to spend more than £30/$45 on the PSU. I also need to know what wattage will be most appropriate?

Elliott Veares · May 6, 2015

I was thinking this: http://www.ebuyer.com/255454-cit-gold-750w-fully-wired-efficient-power-supply-psucit750ugold

clutchc · May 6, 2015

It's not the total watts that is important. All the heavy load on the PC runs off the +12V circuit (or rail). That PSU would probably be... "OK" with its two +12 rails rated at 24A each. But from the specs, it is not a true 750W PSU. Treat it like a 450W PSU. A cheap one, at that. Those specs are what a good quality 450W would have. And Gold, Silver, Bronze means nothing to quality. That is simply an efficiency rating.

Your budget for a PSU is not what it should be to run a GTX 760. Let alone an OC model. Get the CiT and keep your fingers crossed, if you want. I can't recommend one at that price range. This is as low as I would feel comfortable recommending: http://www.ebuyer.com/630119-evga-500w-fully-wired-80-white-power-supply-100-w1-0500-kr

I've used the Evga 500W on a budget build recently. Seemed OK. And Johnny Guru gives it a passing grade: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=384

Elliott Veares · May 6, 2015

So if I spend every last penny and get this (see below), it should be fine? How much power do my CPU & RAM use as well?

http://www.ebuyer.com/269259-corsair-cx-600w-fully-wired-80-bronze-power-supply-cp-9020048-uk

clutchc · May 6, 2015

Elliott Veares :

Hell, what happened to the £30 limit? If you can bust your budget, then get a good PSU. The CX line of Corsair uses inferior capacitors that fail with heat. This is slightly less and a class-A PSU.
http://www.amazon.co.uk/XFX-ATX-550-Power-Supply/dp/B004RJ8EKI/ref=sr_1_1?ie=UTF8&qid=1430966683&sr=8-1&keywords=xfx+power+supply

Elliott Veares · May 6, 2015

I might just go for a XFX Core Edition Pro 650w psu if I can get one for £50 or less.

Elliott Veares · May 16, 2015

Ended up getting a EVGA 850w Supernova G2 Fully modular power supply for £104 in the end.

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Asus GTX 760 OC Mini with 450w PSU?

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