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750w psu. Can I SLI 560 448 core ftw?

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January 31, 2012 1:29:02 AM

Hey guys, I wanted to know if I could do a sli config with my current system.

- I5 2500K OC'd 4.8 ghz 1.38 cpu wattage.
- P8Z68-V PRO/GEN3
- Vertex 3 250gb SSD
- corsair h100
- hcg 750w
- evga gtx 560ti FTW

I want to add another 560 ti FTW into my system, not planning to oc. Will my psu be able to handle it?

Please let me know what you think, thanks!
a c 111 ) Power supply
January 31, 2012 1:47:06 AM

Antec high current gamer psu's are pretty good, you should be able to sli them. I am sure it has enough amperage to power both 448's.

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a c 1101 ) Power supply
January 31, 2012 2:07:54 AM
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For a system using two GeForce GTX 560 Ti 448 Cores Limited Edition graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 750 Watt or greater power supply that has a combined +12 Volt continuous current rating of 60 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

Your Antec High Current Gamer Series 750W (HCG-750), with its combined +12 Volt continuous current rating of 62.5 Amps and with its four (6+2)-pin PCI Express supplementary power connectors, meets the minimum power supply requirements and should be sufficient. Just don't go overboard on the overclocking of the CPU and GPUs.
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a c 144 ) Power supply
January 31, 2012 2:34:00 AM

I do not overclock GPU's. I figure they run hot enough anyway.

Overclocking an i5-K will increase the power drawn by the CPU by about 20 - 25 watts (2 amps @ 12 volts).
a c 1101 ) Power supply
January 31, 2012 2:40:01 AM

i5-2500K power consumption from the +12 Volt rails @ 100% CPU load :
@ 5.0 GHz 224 Watts (18.67 Amps)
@ 4.7 GHz 134.9 Watts (11.2 Amps)
@ 4.3 GHz 99.7 Watts ( 8.3 Amps)
@ 3.3 GHz 75 Watts ( 6.25 Amps) <--- Reference Clock

The OPs overclock to 4.8 GHz is going to increase the power consumption by more than 70 Watts over the stock reference clock.
January 31, 2012 2:45:58 AM

google search antec power supply calculater :) 
a c 1101 ) Power supply
January 31, 2012 3:03:06 AM

bozari said:
google search antec power supply calculater :) 

It's still useless because it doesn't show the combined +12 Volt continuous current rating required on the power supply.

Total Power Supply Wattage is NOT a crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.

The Recommended PSU Wattage shown by that calculator just gives you a general idea on what to look for.
January 31, 2012 3:30:31 AM

A bit new to the psu lingo here. I'm a bit confused. >.<
January 31, 2012 3:30:33 AM

agreed, but i still find single 12 volt rail psu's. It helps to see the total draw. :) 
January 31, 2012 3:34:55 AM

jsc said:
I do not overclock GPU's. I figure they run hot enough anyway.

Overclocking an i5-K will increase the power drawn by the CPU by about 20 - 25 watts (2 amps @ 12 volts).


I'm not planning to oc anything else or anymore on my cpu. Pretty happy with what i have now. I want the sli just for the sheer power and for playing upcoming mmo's and a fps here or there.
January 31, 2012 4:09:23 AM

I ran 2 x GTX560's on an Antec Truepower for a while. Worked just fine. I overclocked them to their breaking point, and never had a problem. I wouldn't try it with some second rate crap PSU though. if your going with a 750, get the Antec.
January 31, 2012 4:13:00 AM

aviconus said:
I ran 2 x GTX560's on an Antec Truepower for a while. Worked just fine. I overclocked them to their breaking point, and never had a problem. I wouldn't try it with some second rate crap PSU though. if your going with a 750, get the Antec.


Done and done. Hehe. I already have the hcg-750. All i need to buy is the ftw 560 ti 448 core before they all run out. I hope it'll still be available by the end of March. I'm keeping a good eye on the stock from my local store.
February 6, 2012 10:59:53 PM

Best answer selected by jin84.
a b ) Power supply
February 6, 2012 11:25:08 PM

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