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Buying a 2nd 680, how many watts will i need? - Page 2

post #11 of 23
at 1920x1080 two 680s won't benefit much. Only real difference is in online BF3 where you will get a minimum frame rate above 60fps rather the ~60fps average you get with a single 680.
Also metro 2033 on max settings will gain a lot. Other than those two, there are no current games that can benefit much.

If you go above 1920x1080, you will see a difference. SLI translates into 90-99% gains in performance currently. So while going from 60 to 120 isn't going to change anything, higher resolutions will see a very nice boost.

As to PSUs:
680 SLI TDP: 195W x 2
2500k TDP: 95W

So you need 485W on the 12V rail. Give yourself 20% overhead for overclocking: about 600W. Also make sure you have enough power connectors.

What store do you use? If you use newegg.com I'd recommend:

HX650
very nice PSU. ATX cable is not modular.

M12II 620W
very good psu. Slightly less efficient but far better priced. Same modularity as the corsair.

OCZ ZT 650W
Very good and well priced fully modular PSU. Some people don't like/trust OCZ for dishonest business practices in the past but they've cleaned up since.

Seasonic x650
Excellent PSU. An extra $40 off after the promo code, bringing it down to $99.99. Very good deal but it says it ends today (9/5/2012). This is definitely my recommendation if you can grab it before the promo code expires.

AX650
Excellent PSU. All black and fully modular cables. Gold rated. Reasonable price after rebate.

Anyway, the x650 is what I recommend since it's such an awesome deal right now. Here's a review. The only thing it really looses marks on is price, which is supposed to be 179.99... not 99.99 o.0 such an awesome price.

If you are using a different store let me know.
    
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post #12 of 23
Thread Starter 
I plan on buying a 120Hz 1200p monitor just to take full advantage of my system. If I'm going to buy 2 of one of the best graphics cards on the markets I should definitely have a nice monitor to go along with it.... so should i get a 2nd one? I want maximum performance for once, even if it is only for a few months until its outdated, ive always had ****ty stuff and now i just got a really good paying job and I have the extra cash biggrin.gif
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post #13 of 23
yeah, on a 120hx monitor there will be a nice difference.

Get the second one if want to spend the money. You certainly don't need it but it would be sweet.
    
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post #14 of 23
Quote:
Originally Posted by iPDrop ascend View Post

This is my set up:
i5-2500k @ 4.6GHz
ASRock Z77 Extreme 4 LGA 1155
G.Skill Ripjaws 8GB(2x4GB) @ 1866MHz
Nvidia GeForce GTX 680 2GB
128GB Samsung 830 SSD
1TB OCZ RevoDrive Hybrid SSD
1TB Western Digital Black HDD
Cooler Master Hyper 212 Heatsink
750w CoolMax Semi-Mod PSU
24X DVD±R/±RW Dual Layer Drive
I'm going to order a 2nd 680
I want a fully modular PSU that is quiet how many watts will I need any suggestions?

To answer your questions.
650w should be fine, 2 680s give around 95% extra performance, get a 120hz monitor, they are great, get one of the PSUs slicedtoad mentioned.
post #15 of 23
650 watt should be fine as everyone is saying but if you see a good 750 on sale during your search I'd get that. Too much headroom is a bad thing but an extra 100 watts is generally ok and should you ever go to a water cooling setup or more power hungry components you will have plenty of room to expand.

Plus with the way GPUs are evolving for any dual card setup you will most likely never again need more then 750 but you might need more then 650 if someone pulls a 580.
    
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post #16 of 23
Buy the monitor before you invest in the GPU. No point wasting all that power on a 1080p 60Hz monitor until you truly need it.
But yeah the X650 is what I would probably go with. The AX650 is the same unit if I recall correctly.
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post #17 of 23
Personally if you are willing to buy two 680's, you should be willing to cough up for a 750+w psu. I would recommend an 800+, just to be clear and safe for future upgrades.
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post #18 of 23
http://www.overclock.net/lists/component/manage/type/RIG

Fill this out so we can see what the rest of your rig looks like.
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post #19 of 23
Quote:
Originally Posted by pwnzilla61 View Post

Personally if you are willing to buy two 680's, you should be willing to cough up for a 750+w psu. I would recommend an 800+, just to be clear and safe for future upgrades.
no. A good gold rated 650W is a better choice than a good 750 or 850 bronze rated PSU unless you actually need more than 650W.

750W is the most anyone should be buying atm unless they are planning 3 or 4 way sli/cf. Even a complex water cooling loop won't take more than about 100W and most take around 30-50W.
    
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post #20 of 23
Quote:
Originally Posted by slicedtoad View Post

no. A good gold rated 650W is a better choice than a good 750 or 850 bronze rated PSU unless you actually need more than 650W.
750W is the most anyone should be buying atm unless they are planning 3 or 4 way sli/cf. Even a complex water cooling loop won't take more than about 100W and most take around 30-50W.

Never said it should be bronze or gold, nothing wrong with a little bit of an overhead. Get a platinum for all I care, I only mentioned, why not.
Edited by pwnzilla61 - 5/9/12 at 5:20pm
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