MSI Lightning GTX 680 Power question

bbell1102

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Sep 11, 2012
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I am new here and have a few questions that hopefully someone can help me or shed some light for me on.

I have been running a EVGA GTX 470 for the past few years on an Antec Earthwatts 650 PSU, and just recently one of my good friends gave me his old video card, which is an MSI Lightning GTX 680.

It came in the mail this morning, and when I tried to install it, I noticed that my PSU only has 1 6+2 pin and 1 6 pin PCI-E power pin.

I did a little research, and found that you can get a power pin to go from a 6 to 8 pin? I also read somewhere that the two extra wires on a 8-pin can provide power if need be. I do not plan at any time to overclock the card at all.

What I am wondering is can I use my one 6+2 and my one 6 pin power plugs and be ok? Or should I buy one of those plugs that I can go from 6 to 8 for the extra power?

I am not sure exactly how much power difference is between the 470/680. I do know the 470 was a big power hog, and I thought that I read somewhere that the 680 uses just as much or less power than the 470.

Or should I consider buying a new PSU?

Here is what else I am running in my case-

AMD Phenom II X4 965 @ 3.6
1 HDD 7600RPM (I believe) Caviar Black Western Dig.
1 basic DVD-RW burner
4 fans (2X120mm, 1X140mm, 1X200mm)


Please let me know if there is any more info you guys need, I was very excited when this finally came in the mail, and am kinda bummed I might need a new PSU to enjoy this card.

PS-I mostly play CS:GO, DayZ, MS Flight Simulator X, and sometimes play BF3/4, and am running a 32in TV at 1366X768.
 
Solution


You will need all the pins to be connected (both 8 pins). A bottleneck refers to a slower pc part holding another back. In your case, gtx 680 can not perform to its max potential because processor can't keep up.

bbell1102

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Sep 11, 2012
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Right I have one 8pin and 1 6 pin power connector, but the GPU has 2 8 pin plugs on it. So is it ok to plug the one 8 pin in and plug the 6pin into the 8 pin slot? Or do I need that converter for the second 8 pin plug?

What do you mean by getting bottle necked by the processor?
 


You will need all the pins to be connected (both 8 pins). A bottleneck refers to a slower pc part holding another back. In your case, gtx 680 can not perform to its max potential because processor can't keep up.
 
Solution

bbell1102

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Sep 11, 2012
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So with the 680 being less power intensive than the 470, would I be fine using the 6 to 8 pin converter, or do I need to bump up to a new PSU.

This is what I'm thinking about getting and running my 1 8 pin and this to it, I'm just curious about the power, but if the 470 uses more power than the 680 I should be fine.

Dual 4-Pin Molex to 8-Pin
 

sylas

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Sep 30, 2009
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Yes that will work for you, and you WILL see an improvement over the 470 for sure. You may be bottlenecked by the CPU a little bit, but that is NO reason to not get the adapters and start using that card right away. Just get a 4GHZ overclock on the CPU if it's that bad. The next CPU you get will be more powerful and probably be mounted to a board that has PCI-E 3.0 support, and then you'll unlock the full potential of that card. You have a pretty swell friend I must say.