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Getting new nvidia card need help

post #1 of 24
Thread Starter 
I am getting a new 670 or 680 but i am having problems deciding which one to get .

To start i have a Corsair CX500 PSU with a GA-Z77N-WIFI motherboard, I7 3770k, 8 gb ram, 1 ssd hard drive and 2 1t HDD and an H100i cooler. I am replacing my 650ti so i can go in a different machine.

My main concern is power, it is recommend for the 680 to have a 550w psu and the 670 is 500, but when i do a psu calculator it technically tells me i can run a 680 but im not the best at making that judgement. I dont want to buy the 680 and not get the full experience. The PSU calculator says i would roughly need 450w PSU for the 680 and 427w for the 670.

any help with this topic would be greatly appreciated.
post #2 of 24
We would also need to know what kinda of CPU and GPU overclock you might do....

Either way you might be a bit under powered...but probably not impossible to go with it.
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post #3 of 24
You can get either card using that power supply with your current set up. More than enough power.

And overclock to boot.
    
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post #4 of 24
I would highly reccomend upgrading your power supply to a 650w or better before buying either of those cards. Once you factor in the ~80% efficiency of the high end power supplies, the capabilities over time as the capacitors age, and your ability to upgrade; 500 doesn't seem like enough to me. It might run it for a while, but it's probably right on the edge.
Edit: I take that back, others seem to feel it's enough.
 
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post #5 of 24
Quote:
Originally Posted by Eiko View Post

I would highly reccomend upgrading your power supply to a 650w or better before buying either of those cards. Once you factor in the ~80% efficiency of the high end power supplies, the capabilities over time as the capacitors age, and your ability to upgrade; 500 doesn't seem like enough to me. It might run it for a while, but it's probably right on the edge.

No.

You can run 670/680 sli on a 550 watt PSU http://www.guru3d.com/articles_pages/geforce_gtx_670_2_and_3way_sli_review,4.html

We decided to move away from Furmark in early 2011 and are now using a game like application which stresses the GPU 100% yet is much more representable of power consumption and heat levels coming from the GPU. We however are not disclosing which application that is as we do not want AMD/ATI/NVIDIA to 'optimize & monitor' our stress test whatsoever, for our objective reasons of course.

Our test system is based on a power hungry Core i7 965 / X58 system. This setup is overclocked to 3.75 GHz. Next to that we have energy saving functions disabled for this motherboard and processor (to ensure consistent benchmark results). On average we are using roughly 50 to 100 Watts more than a standard PC due to higher CPU clock settings, water-cooling, additional cold cathode lights etc.

We'll be calculating the GPU power consumption here, not the total PC power consumption.

Measured power consumption one card

System in IDLE = 140 W
System Wattage with GPU in FULL Stress = 279 W
Difference (GPU load) = 139 W
Add average IDLE wattage ~10 W
Subjective obtained GPU power consumption = ~ 149 Watts

Measured power consumption two cards in SLI x2

System in IDLE = 160W
System Wattage with GPUs in FULL Stress = 433W
Difference (GPU load) = 273W
Add average IDLE wattage ~20W
Subjective obtained GPU power consumption = ~ 293 Watts

Measured power consumption three cards in SLI x3

System in IDLE = 170W
System Wattage with GPUs in FULL Stress = 583W
Difference (GPU load) = 403W
Add average IDLE wattage ~30W
Subjective obtained GPU power consumption = ~ 433 Watts
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post #6 of 24
Go with a 670 FTW, and save some money. It's basically a stock 680 anyway
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post #7 of 24
Thread Starter 
i am OC the CPU to 4.2Ghz and ive never OC'ed a GPU yet i am trying not to upgrade the PSU i just bough it in Dec so its still new
post #8 of 24
Your power supply is overkill even for an overclocked 3770k and 670/680.
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post #9 of 24
Thread Starter 
ive been leaning for the 670 just because of my psu but i money isnt the problem and if i can would go 680 for the futureproof but i guess either way 670 or 680 there both badass
post #10 of 24
Go whichever if u dont have a budget. Ur psu will handle any type OC on that system.
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