Dual GPUs on 650W PSU

David Raynor · Jan 15, 2014

I have a Kingwin Maximum 650w PSU, running on a ASUS MSA97 motherboard, Quad Core AMD AM3+ 95W 3.8 overclocked to 4.2Mhz. and I want run a EVGA GTX 760, with a GTX 650 dedicated to Physix. Will my PSU handle it?

daswilhelm · Jan 15, 2014

i wouldnt try it, not with two 12v rails. get yourself a decent brand of psu (seasonic, antec etc) with one 12v rail. also, is there still a need to run a dedicated physx card? i would think the 760 should be able to handle it.

David Raynor · Jan 15, 2014

daswilhelm :

I am upgrading from the 650 to the 760, and just figured, why not use both? If it's too much power draw, I'll just take out the 650.

quilciri · Jan 15, 2014

daswilhelm :

Incorrect. The PSU is plenty for that pair of cards. The 650 uses 43w at peak power, and the 760 peaks at 165 watts. You could run two 760's off that PSU.

I am unfamiliar with that particular model from kingwin, but kingwins other models are good units. (Mach 1, lazer and stryker receiving jonnyguru review scores of 8, 8.5, and 9 respectively)

[edit] on further investigation, your PSU is a Superflower built unit, which is a good quality manufacturer. you're good to go.

daswilhelm · Jan 15, 2014

quilciri :

this is the model number i came up with, KINGWIN ABT-650MM 650W. i wouldnt recommend that psu with a single gpu. its a poor quality unit.

quilciri · Jan 15, 2014

Also, note that Antec isn't actually a PSU manufacturer, and their units vary in quality with the company that actually makes them. Seasonic makes Antec's high end units (e.g. HCG-M), while other models are built by more mediocre manufacturers such as CWT (Phantom, smartpower modesl, etc)

daswilhelm · Jan 15, 2014

yes i understand that...

quilciri · Jan 15, 2014

daswilhelm :

You have the wrong model. The original ABT series is not the same as the maximum series.
http://www.tomshardware.com/reviews/power-supply-oem-manufacturer,2913-7.html

daswilhelm · Jan 15, 2014

http://www.newegg.com/Product/Product.aspx?Item=N82E16817121084

box says maximum power?

OP, can you provide the model number from your psu?

quilciri · Jan 15, 2014

hmm, let me check a bit more. Either way, it's a superflower manufactured unit, I'd like to see that review you say is bad on it. As far as quality consistency, Superflower is only second to seasonic, imho.

David Raynor · Jan 15, 2014

daswilhelm :

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1375740&CatId=1483
In case the link doesn't work, Item#: K450-0600 | Model #: ABT-650MM

daswilhelm · Jan 15, 2014

yea thats the one i found on newegg. newegg stated 2 12v rails, but looking at the sticker on the unit, its clearly one rail. you will be able to power both cards, but i wouldnt trust that psu on my system, personally. i would replace it with a decent unit from a reputable manufacturer.

quilciri · Jan 15, 2014

Superflower is a reputable manufacturer.

daswilhelm · Jan 15, 2014

reviews online say otherwise. like i said, i personally, would not not use this.

quilciri · Jan 15, 2014

please post a link to one of these reviews. I have yet to find a review on this particular unit. All of Superflowers other PSU's that I've seen reviews of are good or great, so I'm a bit skeptical about this one.

daswilhelm · Jan 15, 2014

click my newegg link.

David Raynor · Jan 15, 2014

It's been running my rig for about a year with no problems. Granted, the 650 isn't going to be working it too hard, but Borderlands 2 in 1080p on one screen and 1080p video stream on the other work fine. Current rig just can't really run Physx.

quilciri · Jan 15, 2014

Here is a review for the ABT450-MM (lower wattage of the same line also made by superflower) from hardware secrets, which gave it a good review.

http://www.hardwaresecrets.com/article/Kingwin-ABT-450MM-Power-Supply-Review/533/10

I love how they added a caveat that one of the fuses blew....when they were pushing 515w through a PSU rated for 450w

daswilhelm · Jan 15, 2014

David Raynor :

you should be fine with that setup.

quilciri · Jan 15, 2014

daswilhelm :

I don't mean this in a malicious way, but if you use newegg reviews as a point of reference, you may be laughed off these forums

daswilhelm · Jan 15, 2014

as my only point of reference, no. but i take it into consideration.

quilciri · Jan 16, 2014

@David: Enjoy your Physx card

@Das: It is the only reference you used here, and unless there is something you haven't shared, you asserted it was a bad PSU based solely on newegg with no caveat that your only information was from newegg comments. As "evidence" to back up an opinion, newegg is extremely weak. If that were my only source of information on a product, I would refrain from commenting, or at least add an explicit disclaimer. It falls down in comparison to the extensive testing done on reputable sites such as jonnyguru, hardwaresecrets, etc., and especially against Superflowers excellent track record.

Also, towards your first comment, it's rare for a PSU to have more than one true +12v rail. Almost all have a single +12v rail, just multiple cables on that rail.

daswilhelm · Jan 16, 2014

ive been building pc's for 20 years, i've had my share of experience with different brands, and yes brands obviously have changed over the years, but i have my reasons for staying away from certain brands.

David Raynor · Jan 29, 2014

Everything is up and running with the 760 SC ACS and the 650 being dedicated to Physx. without any overclocking I get 3DMark Fire Strike score of 5020, not bad for a AMD FX-4300 I think. very happy with it so far! Thanks for all the help guys!

quilciri · Jan 29, 2014

great, enjoy!

Dual GPUs on 650W PSU

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