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Will a Ultra LSP750 750-Watt Power Supply support dual NVIDIA GTX 680's?

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March 11, 2013 2:39:58 PM

Will a Ultra LSP750 750-Watt Power Supply support dual NVIDIA GTX 680's?

I already ordered it all and it looked like it would handle it but I just want to be sure.

Which psu would be the best for this setup?
March 11, 2013 2:50:17 PM

I believe 750 would barely be enough, however, I do not believe they are a highly regarded manufacturer. A Corsair PSU of the same wattage costs almost double.... you are going to put almost 1000$ worth of cards on a 60 dollar PSU? I'd say that is asking for trouble.
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a c 122 ) Power supply
a b Î Nvidia
March 11, 2013 2:58:00 PM

Simple answer no.

For a system using two GeForce GTX 680 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 750 Watt or greater power supply that has a maximum combined +12 Volt continuous current rating of 53 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.
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March 11, 2013 2:58:24 PM

Also, that PSU does not look like it provides enough PCI plugs, generally a sign that the PSU is not appropriate for your uses.
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March 11, 2013 3:13:23 PM

Never ceases to amaze me that people trust their high end rigs with crap PSUs. Thumbs up.
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a c 259 ) Power supply
a c 87 Î Nvidia
March 11, 2013 3:22:24 PM

Ultra power supplies are crap plain and simple. I would not trust a single GTX 680 to that unit much less 2. Since you can afford $1000 worth of GPUs it would be a good idea to get a decent power supply.

For SLI GTX 680s an 800w power supply is recommended.

http://www.realhardtechx.com/index_archivos/Page362.htm

Stick with Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec or the higher efficiency Rosewill units. Personally I would go with a Seasonic X series. One of the best models on the market with top notch voltage regulation and stability for your expensive computer.
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a b ) Power supply
March 11, 2013 3:31:20 PM

anort3 said:
Ultra power supplies are crap plain and simple. I would not trust a single GTX 680 to that unit much less 2. Since you can afford $1000 worth of GPUs it would be a good idea to get a decent power supply.

For SLI GTX 680s an 800w power supply is recommended.

http://www.realhardtechx.com/index_archivos/Page362.htm

Stick with Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec or the higher efficiency Rosewill units. Personally I would go with a Seasonic X series. One of the best models on the market with top notch voltage regulation and stability for your expensive computer.

False. Some of them are actually decent. The one OP has is crap though.

To answer the OP's question, your psu will not support 2 gtx 680's in sli safely. You can try but when your thousand dollar system fries you are the only one to blame.
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March 11, 2013 3:33:21 PM

anort3 said:
Ultra power supplies are crap plain and simple. I would not trust a single GTX 680 to that unit much less 2. Since you can afford $1000 worth of GPUs it would be a good idea to get a decent power supply.

For SLI GTX 680s an 800w power supply is recommended.

http://www.realhardtechx.com/index_archivos/Page362.htm

Stick with Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec or the higher efficiency Rosewill units. Personally I would go with a Seasonic X series. One of the best models on the market with top notch voltage regulation and stability for your expensive computer.


If I were to go corsair, would this one be good?

http://tigerdirect.com//





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a b ) Power supply
a b Î Nvidia
March 11, 2013 3:44:19 PM

chugot9218 said:
I believe 750 would barely be enough, however, I do not believe they are a highly regarded manufacturer. A Corsair PSU of the same wattage costs almost double.... you are going to put almost 1000$ worth of cards on a 60 dollar PSU? I'd say that is asking for trouble.


No they are absolutely not a trusted manufacturer. Ultra is a brand that's synonymous with making a lot of products that are considered cheap junk. Definitely avoid at all costs.
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a c 122 ) Power supply
a b Î Nvidia
March 11, 2013 3:45:31 PM
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a c 259 ) Power supply
a c 87 Î Nvidia
March 11, 2013 3:49:14 PM

Azn Cracker said:
anort3 said:
Ultra power supplies are crap plain and simple. I would not trust a single GTX 680 to that unit much less 2. Since you can afford $1000 worth of GPUs it would be a good idea to get a decent power supply.

For SLI GTX 680s an 800w power supply is recommended.

http://www.realhardtechx.com/index_archivos/Page362.htm

Stick with Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec or the higher efficiency Rosewill units. Personally I would go with a Seasonic X series. One of the best models on the market with top notch voltage regulation and stability for your expensive computer.

False. Some of them are actually decent. The one OP has is crap though.

To answer the OP's question, your psu will not support 2 gtx 680's in sli safely. You can try but when your thousand dollar system fries you are the only one to blame.


Captain Fordo said:
anort3 said:
Ultra power supplies are crap plain and simple. I would not trust a single GTX 680 to that unit much less 2. Since you can afford $1000 worth of GPUs it would be a good idea to get a decent power supply.

For SLI GTX 680s an 800w power supply is recommended.

http://www.realhardtechx.com/index_archivos/Page362.htm

Stick with Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec or the higher efficiency Rosewill units. Personally I would go with a Seasonic X series. One of the best models on the market with top notch voltage regulation and stability for your expensive computer.


If I were to go corsair, would this one be good?

http://tigerdirect.com//







Yes that Corsair would be fine.
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Best solution

a c 1167 ) Power supply
a c 86 Î Nvidia
March 11, 2013 3:51:23 PM

For a system using two GeForce GTX 680 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 750 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 53 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors or two 6-pin and two 8-pin PCI Express supplementary power connectors depending on brand and model of the graphics card.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated @ 45°C - 50°C ambient temperature, is the most important factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The Corsair TX Series TX850 (SKU# 75-001311 / CP-9020043), with its maximum combined +12 Volt continuous current rating of 70 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with two GeForce GTX 680 graphics cards in 2-way SLI mode.

The Corsair TX Series TX750 version would also be sufficient.
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a c 259 ) Power supply
a c 87 Î Nvidia
March 11, 2013 3:51:28 PM

Azn Cracker said:
anort3 said:
Ultra power supplies are crap plain and simple. I would not trust a single GTX 680 to that unit much less 2. Since you can afford $1000 worth of GPUs it would be a good idea to get a decent power supply.

For SLI GTX 680s an 800w power supply is recommended.

http://www.realhardtechx.com/index_archivos/Page362.htm

Stick with Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec or the higher efficiency Rosewill units. Personally I would go with a Seasonic X series. One of the best models on the market with top notch voltage regulation and stability for your expensive computer.

False. Some of them are actually decent. The one OP has is crap though.

To answer the OP's question, your psu will not support 2 gtx 680's in sli safely. You can try but when your thousand dollar system fries you are the only one to blame.


Those few X3 and X4 models that rated well are still Andyson made and that's all I need to know to tell me it's not going in my computer no matter how well one or two particular models may do in testing.
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