Will Nvidia GTX650 Run on 300W PSU? (and some other questions)

gamedesigner101

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Feb 22, 2013
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Okay.. So i recently upgraded my PC, like really recently....

My old specs were (and it will be useful to know this later on)

Processor: Intel core 2 quad CPU Q6600 @2.40GHz

3.25GB of DDR2 ram (please don't ask how i have .25 i really don't know although i do have 4 x 1gb ram so yeah...)

GFX: Nvidia GeForce 8500 GT

500W PSU which has a bunch of Volt to Amp comparisons. (+12V over 25A being one of them)

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We'll come back to that later..

My new computer:

AMD A8-6500 APU @ 3.2GHZ

6GB of DDR3 Ram

GFX: Radeon HD Dual Graphics 8570D + a 5450 (Although to this day i haven't found that card in the system or anything so i think the 5450 is either integrated into the CPU or i'm partially blind)

300W PSU which i have no other info for..

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Now, I went and bought a GTX650 a few days ago.. now honestly i don't have a clue why? i wanted to upgrade the graphics for games such as star citizen and high end games. But i am aware that the 650 will replace the 8570D instead of something like a HD7770 would crossfire with it.. the reason i did this is because it was £150 for two 650's (at this point should mention they are not the TI or TI BOOST version)

I want to put in the 650 because from all the benchmarks i've seen it is still a better card by quite a distance (http://gpuboss.com/gpus/Radeon-HD-8570-vs-GeForce-GTX-650)

Finally, Question time!

Should i put the 650 in? baring in mind that gpuboss comparison doesnt take into account there may be a 5450 hidden somewhere working with the 8570.

If its worth it (which i believe it is) will it run on a 300W PSU? i know that some cards will continue to work just a bit bottlenecked if it doesnt receive quite the power it needs.

If your 100% sure theres some risk in doing so my old PC does have the 500W PSU.. but that whole system is really old. (the 8500GT was pretty high end when it was built) has PSU mechanics really advanced enough in this time for my new PSU to still be more efficient than the old PSU? (Short story, should i swap them?)

After all of that.... I still need the old PC in working order to give away so if we do swap i'll need the 300W to be enough for that system...

Anyway i think i've forgotten something but i dont know what..

Thanks for all your help :)

EDIT: i Only bought one 650 so far, but yeah.... i know they cant be SLI'd but im not sure why)
 

clutchc

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The GTX 650 is a 64W card (5.3A @ +12V) and Nvidia recommends a 400W PSU minimum.
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-650/specifications
Most GTX 650s also require a 6 pin aux power connection. What is the amp and wattage rating of your 300W PSU on the nameplate? If the PSU isn't of low quality, it will probably be OK.

But you could have done better by getting the new GTX 750ti. No aux connector needed and it can run on a 300W PSU. And it will run circles around the GTX 650. http://www.evga.com/articles/00821/#3753 It usually goes for about the same price as the one you bought.

http://gpuboss.com/gpus/GeForce-GTX-650-vs-EVGA-GeForce-GTX-750-Ti
(and this is not the Superclocked version of the 750ti)
 
The 650 is cheaper than the 750Ti by quite a bit.
However, if you need to buy a new PSU for that card, it's all for nought..

BTW the 650 uses only 4W more than the 750Ti. Probably it'll run too if a 750Ti runs.
However the OP will need a non-6-pin card such as the ASUS GTX650-E-1GD5 or GTX650-E-2GD5 to run on that PSU.