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Ultra LSP750 750-Watt or Corsair TX650W 650-Watt ??

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September 19, 2010 7:29:50 PM

I need a PSU. Needs to fit in a Dell Studio 540 for now, but in the future will need to power an overclocked Intel Core 2 Quad Q6600 plus a Crossfire Radeon 5770.

Looking at these 2:
Ultra LSP750 750-Watt http://www.tigerdirect.com/applications/SearchTools/ite...

Corsair TX650W 650-Watt http://www.tigerdirect.com/applications/SearchTools/ite...

Would like it to be Quiet with good airflow.

Also open to other PSU suggestions. Thanks so much.
a c 164 ) Power supply
September 19, 2010 7:42:50 PM

the corsair will do it easily but both are a bit overkill. the corsair 430w is more then enough for your spec. Antec also is having a great sale on their 520w PSU and it costs less then the corsair



$35 after mail in rebate and instant rebate
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

*i read that as single 5770 not CF. disregard the the corsair 430w comment then. The 520 antec or any 550w+ from corsair, seasonic, antec will do the trick.
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a b ) Power supply
September 19, 2010 8:51:32 PM

Personally I'd want a bit more power for your future configuration than 430W. I'd prefer to run at no more than 80% of the psu's requirement, and your 2x5770 looks like it might draw 400W. Though Antec makes some great lines, and I've not seen a review of the Antec Neo's performance/quality.

So I guess I'd suggest a 500W+ unit like:

Seasonic 520W http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094

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September 19, 2010 9:36:42 PM

Well the thing is, I'm going to being doing a ton of gaming on it. And when I see gaming rigs for sale that are pre-built, they always have at least a 750-watt PSU.
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a c 164 ) Power supply
September 19, 2010 9:50:26 PM

fluke83 said:
Well the thing is, I'm going to being doing a ton of gaming on it. And when I see gaming rigs for sale that are pre-built, they always have at least a 750-watt PSU.


yeah but they have generic power supplies with peak watt ratings at unrealistic temps. most can barely provide 80% of their listed power in an actual gaming PC. also the majority of their power is not on the 12v rail which powers your CPU and GPU.

a solid built unit will list its continuous power at high temps with most of its power on the 12v. a corsair 550w for example will peak at close to 650w. A lot of companies would simply sell that as a 700w PSU and call it a day.


for example here are two reviews of 450w PSU

"This unit can’t deliver its labeled power – like Elite Power 400 W, it can only deliver up to 420 W. To make things worse, this unit is sold for USD 10 more than Elite Power 400 W – an extra 33% profit for Cooler Master for counterfeiting their own power supplies."

http://www.hardwaresecrets.com/article/Cooler-Master-El...

You will bring home a relatively inexpensive power supply that even though is sold as being a 450 W unit can deliver up to 570 W at 48º C – in fact Corsair could have easily labeled this power supply as a 500 W unit, but they preferred to stay on the safe side.
http://www.hardwaresecrets.com/article/Corsair-VX450W-P...
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