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How Much Power is Enough to Run a 780ti? (Also, what CPU won't be a bottleneck)

Last response: in Graphics & Displays
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June 12, 2014 7:31:36 PM

(If the category is incorrect, I apologize. This is a bit of a hybrid thread that I thought was too short to split into multiple threads.)

I plan on buying a 780 ti and I need to know just how much juice I need to run it.

Currently I have an A8-5500 CPU, a 7790 GPU, and a 430w power supply (which I got because New Egg said I needed it).

I will be getting a 780 ti and a new processor soon-ish and when I used the Newegg Power Supply Calculator it said I needed at least a 1166w power supply to run it, which I'm pretty sure is bs.

So, my questions really are:
1. If I get the 780 ti now without anything else new, would my Power Supply be able to run it?
2. If not, then what power supply would I need (along with room to upgrade the processor)?

The next section is much more simple (in that it requires less specifiers).

My current motherboard has an FM2 slot which means the best CPU that fits is an A10-6ish. So would an A10 bottlneck a 780 ti? If so then its down to an i7 versus an FX (and I really don't wanna fork over that much money for a cpu).

More about : power run 780ti cpu bottleneck

a b à CPUs
June 12, 2014 7:36:25 PM

The 780ti recommend a 500 watt or greater power supply with a minimum of 42 amps on the +12 volt rail
So the xfx 550w should work just don't do any high overclock
http://www.ncixus.com/products/?usaffiliateid=100003150...
A good 600w psu should be able to run the 780ti fine like the xfx 650w
http://www.amazon.com/dp/B0045L5LGI/?tag=pcpapi-20
Any fm2 cpu would bottleneck the 780ti.
The FX 83xx or any I5 shouldn't bottleneck the 780ti
What is your budget for cpu and psu.
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a b ) Power supply
a b à CPUs
June 12, 2014 7:44:20 PM

Well honestly I use EVGA product specifications for figuring out what sort of PSU a NVidia GPU needs because EVGA GPUs are only NVidia and they give a lot of specs in detail on their website making it easier to figure out. And according to EVGA the most power hungry GTX 780 Ti GPUs only need a PSU of 600 watts, with the cards TDP being around 250 watts. So yeah, the Newegg Power Supply Calculator was complete bullcrap.

You will need to upgrade you PSU to at least a 600 watt with a good rating and ensure that it has enough power connectors for the added power the 780 Ti needs. Technically you should not need more than a 600 watt bronze rated power supply but if you find a decent rated and priced one that has a bit more wattage, then I would recommend you go with that. With that being said the 600 watt should be able to run your entire system okay because with the GPU only taking 250 watts, and your current A8-5500 CPU only needs 65 watts, then you are completely fine.

I would not think there should be a bottleneck between the GPU and CPU, especially if you are only gaming at 1080p. And I don't suggest purchasing an i7 CPU right now. I would recommend you create a new question for the forum specifically to ask for input on sticking with the A8-5500 CPU or switching to something else, while including that you are going for a GTX 780 Ti and are worried about bottlenecking. If you decide to post a new forum question for that, please give the rest of your specs such as RAM, hard drive type, operating system, and monitor specs because people should be wanting that information when talking about bottlenecking to give a true representation...if they don't ask for that information then they don't really know what they are talking about.
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a b à CPUs
June 12, 2014 11:02:46 PM

As far as bottlenecks go, the lower your resolution, the more likely a bottleneck occurs on the CPU and truth be told, there isn't a CPU that exists that will never be a bottleneck for the 780ti. That doesn't mean it will always bottleneck and it doesn't mean the 780ti won't be worth using, just that no matter what CPU you purchase, there will be games that will bottleneck it. It just won't be severe if you get something like an i5 or i7.

A balanced system will have bottlenecking that switches from the CPU and GPU depending on the game and where at in the game. If the CPU never bottlenecks, you probably got too powerful of one for your GPU.
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June 13, 2014 5:21:36 PM

NBSN said:
I would recommend you create a new question for the forum specifically to ask for input on sticking with the A8-5500 CPU or switching to something else, while including that you are going for a GTX 780 Ti and are worried about bottlenecking.


Going with your advice. Thanks for the help and the suggestions. I appreciate it pal, you get solution/best answer! :3

To the rest, I appreciate your help as well.
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