750w PSU enough for Sandy Bridge?

[UnitedExpress4180]

I'm working on building a Sandy Bridge PC. I plan to use:

-i5 2500k
-MSI P67S-C43 (B3)
-4 GB RAM (not sure what brand yet, for now I'm going to use the existing 4GB RAM out of my HP system)
-1 DVD burner
-1 WD Caviar Blue, 640 GB, 7200 RPM
-1 ATI HD5770 (eventually will be upgraded to GTX 560)
-Cooler Master Hyper 212 Plus
-4 120mm case fans

My question is whether I need a 750 watt power supply for this build (I am looking at a Corsair TX750), or if I can get by with less/need more. Any thoughts?

 

[henydiah]

too much but it's good and more power, 500 - 600 will be enough power . But if you need PSU, tell us about bugdet .. Maybe more friend can give you advise

 

[ko888]

For a system with a single GeForce GTX 560 graphics card NVIDIA recommends a power supply with a minimum of a 450 Watts or greater with a +12 Volt continuous current rating of 24 Amps or greater and with at least two 6-pin PCI Express supplementary power connectors.

The power supply's +12 Volt continuous current rating specification is what you should be worried about not the wattage.

 

[browsingtheworld]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817815007&Tpk=xigmatek%20400w

Would be fine even when upgrading.

 

[UnitedExpress4180]

Perhaps I should also mention that when I get my 2500k I'm going to overclock the crap out of it? I am currently also looking at the TX650.

 

[browsingtheworld]

Overclocking adds what? 5-10W, maybe?

The 400W PSU will be fine:

This is with a 130W i7.

 

[UnitedExpress4180]

Ohhhh okay well then at the very least I guess I should still get something around 600 to 650 watts so I can have the option to upgrade stuff down the road then. Thanks all!

 

[ko888]

An Intel Core i5-2500K will draw 6 Amps more from the +12 Volt rail when overclocked to 4.9 GHz running at 100% CPU load than when running at its stock clock speed of 3.3 GHz.

The Corsair CMPSU-650TXV2 would give you plenty of headroom for overclocking both the CPU and the GPU.

 

[leandrodafontoura]

Friend, no more than 750@ is required, but get at least 650W. You want get double of waht you really need, so you are not stressing continuously the PSU, wich would result in a short lifetime, more heat, and more noise from tha fan.

In addition, you may want to have room for upgrades, like adding watercooling, more HDDs, a 2nd videocard... Think carefully, as the price diference is very low, and its a piece of hardware thas gonna stick around the next 10 years without the need of replacement.

 

[AdrianPerry]

500w is enough for a 560 Ti and Sandy Bridge CPU.