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What power supply do I need to SLI 2xAsus gtx 680

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asalikus said:
I need lots of connectors. I will be using 3570k overclocked to 4.5GHz.

The link to the video cards
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


I'd get something a little more powerfull if I was you. Just in case you ever get a third one and well you never know how much power angry the future GPU will be.

Paying 20$ extra dollars now and keep that PSU for years is bether for your wallet then having to buy a new one in 2years + (depend how often your upgrading).

On a side note I was thinking to go the 2x 680gtx myself. Ended with 2x 670gtx and it was my best move I'd say. 800$ for less then 10% power lost and no supply problem instead of 1000$ for so little and the supply headach.

I would go with a 1000 watt power supply long before I would ever use a 750 watt on that setup. Why risk having power issues when for a little more you could not worry about running your system and 100% load and not smoke the power supply or hear a fun running like a hair dryer.

Best solution

Power supply Master

http://www.nvidia.com/object/geforce_family.html

Quote:
Maximum Graphics Card Power = 195 watts
Minimum System Power Requirement = 550 watts


So, essentially for SLI, nVidia is recommending 745 watts.

http://www.guru3d.com/article/asus-geforce-gtx-680-asus...

Quote:
Here is Guru3D's power supply recommendation:

GeForce GTX 680 - On your average system the card requires you to have a 550 Watt power supply unit.
GeForce GTX 680 SLI - On your average system the cards require you to have a 750 Watt power supply unit as minimum.

If you are going to overclock GPU or processor, then we do recommend you purchase something with some more stamina./quote]

The card can be overclocked to 20+%. Guru3D measured the Asus GCII TOP model at 181 watts under full load w/ a 13% factory OC....adding 10% to that would add say 20 watts for each card plus say another 45 watts for a OC'd CPU. If overclocking the CPU and GPU, I'd be comfy w/ a 850 watter.

For the overclock you are looking for , I'd be looking for a PSU that can deliver 0 - 100% load w/ less than 1 % voltage variation. There are very few of those around....check jonnyguru for 10.0 performance rated units.

Antec CP series
Corsair HX series (except for 1000 and 1050 watt models)
Seasooic X Series.
XFX Black Edition Series

voltage is not my problem i need the right cables because this not a regular video card it needs 14 pins to operate it and I'm going to SLI it so I need a monster power supply!



JackNaylorPE said:
http://www.nvidia.com/object/geforce_family.html

Quote:
Maximum Graphics Card Power = 195 watts
Minimum System Power Requirement = 550 watts


So, essentially for SLI, nVidia is recommending 745 watts.

http://www.guru3d.com/article/asus-geforce-gtx-680-asus...

Quote:
Here is Guru3D's power supply recommendation:

GeForce GTX 680 - On your average system the card requires you to have a 550 Watt power supply unit.
GeForce GTX 680 SLI - On your average system the cards require you to have a 750 Watt power supply unit as minimum.

If you are going to overclock GPU or processor, then we do recommend you purchase something with some more stamina./quote]

The card can be overclocked to 20+%. Guru3D measured the Asus GCII TOP model at 181 watts under full load w/ a 13% factory OC....adding 10% to that would add say 20 watts for each card plus say another 45 watts for a OC'd CPU. If overclocking the CPU and GPU, I'd be comfy w/ a 850 watter.

For the overclock you are looking for , I'd be looking for a PSU that can deliver 0 - 100% load w/ less than 1 % voltage variation. There are very few of those around....check jonnyguru for 10.0 performance rated units.

Antec CP series
Corsair HX series (except for 1000 and 1050 watt models)
Seasooic X Series.
XFX Black Edition Series
Quote:

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