Power Supply Help

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awesomecarter

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Apr 19, 2013
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Hey there, I am looking into buying a new graphics card. I am new to the graphics card world and am need of some help. I have done my graphics card research very thoroughly to make I get the best one.

I chose the EVGA EVGA GeForce GTX 650 Ti BOOST Superclocked.

http://www.evga.com/Products/Product.aspx?pn=02G-P4-3658-KR

This graphics card requires a 450w power supply, and my current supply is a 460w.
My question is will the card and computer still run fine, even though the requirements are quite close?

And, if you think it is too much for my computer to handle, I will consider buying a power supply, but how many watts would I need to ensure it runs smoothly?

P.S I have not bought the card yet, I want to make sure it will run good before I purchase it.


Any help will be greatly appreciated!
Thanks, Carter
 
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awesomecarter

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Apr 19, 2013
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I'm not too sure, my computer is a standard Dell XPS 8300

Intel i5 2320 @ 3.00GHz
6gb ram

I just know that it has 460w.
Is there a way that I can find out what brand/model it is?
 
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adycopilu

adycopilu

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Mar 8, 2013
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It should be written on the PSU itself, however I doubt it is a very capable one... Even if it can deliver enough power to the system, you should first make sure it has the 6-pin connector for the video card (650 Ti Boost requires one). Alternatively, you can use some adapters from the MOLEX connectors.

Anyway, you can buy the graphic card and then check the system stability. Your current configuration doesn't seem too demanding (provided that you don't have several HDDs and other extension cards). If not stable, buy a new PSU (500W from a good brand, with >80% efficiency). I would recommend Seasonic, Enermax, Corsair, Antec, Chieftec. Or better just buy the PSU together with the video card.
 
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awesomecarter

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Apr 19, 2013
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Alright, thanks for the advice man, I will take a look inside my system in a few hours.
 
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awesomecarter

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Apr 19, 2013
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Ok I have opened up my rig, and found the brand and model number. Its the Dell H460AD-00. It has 2x 6 pin connectors, which is great. But of course there is a downfall. On the +12V rail the amps are only 18. I think. I hope im reading the chart right.( http://www.txcesssurplus.com/catalog/25834-DELL-7P3WV-L.jpg ) The card requires a 24 amp on the +12V rail. So my guess is that you are going to tell me that I new power supply to support this card.
 
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adycopilu

adycopilu

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Actually, the 24A on the 12V rail is just a recommendation, which comes from nVidia, but I found out in practice that it rarely is there any case to actually use that amount. If you think about it, the video card is rated at 140W which only requires ~12A when powered by +12V.
On the other hand, it's also true that the 12V rail does not feed only the video card and maybe the manufacturer was optimistic about rating it's PSU. On top of that, when the PSU is approaching the upper limit of what it can supply, it will overheat and it will not provide such a constant voltage.
In other words, judging by the specification, the combination should work, however this is only theoretical and in practice you may experience system instability.
What would I do? I would just try with the current PSU, there is no danger to it. If any problems, I would later upgrade the PSU as well.

LE: You should also consider what are the other major consumers on the +12V rail.
 
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awesomecarter

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Apr 19, 2013
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Hey man, thanks for all the advice and help. I have talked to some local computer shops around town and they all said it would be fine, but I would be cutting it close. I opened some other threads on different sites so I compare the answers to make they were right. So, since I think I will be possibly upgrading some other things in the future, I chose just to upgrade my PSU. I choose to give it a little more wattage and made sure it was good quality. Also, it is pretty cheap aswell! The Cosair CX500.

http://www.amazon.com/Corsair-Builder-Watt-EPS%C2%A0-CX500/dp/B0092ML0MY/ref=sr_1_1?s=electronics&ie=UTF8&qid=1366490999&sr=1-1&keywords=corsair+cx500

Once again, thanks!
-Carter
 
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ko888

ko888

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Feb 18, 2009
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For a system using a single GeForce GTX 650 Ti BOOST graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

The EVGA GeForce GTX 650 Ti BOOST Superclocked draws less than 11 Amps from the +12V rail(s).

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the critical factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The Dell OEM 460W (H460AD-00) power supply, with its maximum combined +12 Volt continuous current rating of 32 Amps and with two 6-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single GeForce GTX 650 Ti BOOST graphics card.

There is no need to buy a new power supply unit unless you're planning on buying two GeForce GTX 650 Ti BOOST graphics cards to use in 2-way SLI mode.
 
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awesomecarter

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Apr 19, 2013
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Ok, so know you say I dont need to upgrade my PSU?

 
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ko888

ko888

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If you like wasting money, buying something you don't need, then you can go right ahead and do that.

I have shown you that your current power supply has more than enough available power capacity to handle the GeForce GTX 650 Ti BOOST.
 
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awesomecarter

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Apr 19, 2013
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Alright, thanks

 
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