Do I need 650w or 750w ?

[chaarlie]

CPU- i5 2500k

GPU: EVGA 560 ti SC

Case- Cooler Master HAF 912 Plus

Hard drive- 500GB Western Digital Caviar Blue

RAM- 4GB(2x2gb) Corsair Vengeance

Mobo- Asus P8Z68-V LX

I'm stuck between two power supplies:

Corsair Tx 650w
Corsair Tx 750w

Which one do I need? I might overclock! Won't be doing SLI

 

[popatim]

either one.

 

[chaarlie]

So either one is fine?

 

[totalknowledge]

Even the NVidia recommendation is > 500W (well below both units) which is even a tad high.

SLI/Crossfire is usually the only time you need a beefy psu.

 

[ko888]

For a system using a single GeForce GTX 560 Ti graphics card NVIDIA specifies a minimum of a 500 Watt or greater power supply that has a combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

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 Corsair Enthusiast Series TX650 V2 (CMPSU-650TXV2), with its +12 Volt continuous current rating of 53 Amps and its two (6+2)-pin PCI Express supplementary power connectors, will be way more than sufficient to power your system with a single GeForce GTX 560 Ti.

The Corsair Enthusiast Series TX750 V2 (CMPSU-650TXV2), with its +12 Volt continuous current rating of 62 Amps and its four (6+2)-pin PCI Express supplementary power connectors, will also be way more than sufficient to power your system with a single GeForce GTX 560 Ti.

A good 550 Watt model would be more than enough.

 

[amuffin]

650w for sli

 

[chaarlie]

Thanks guys! Guess I'll just go with 650w and save some cash

One more question, will it be okay to OC with 650? does the CPU wattage increase a lot when overclocking?

 

[ko888]

Thanks guys! Guess I'll just go with 650w and save some cash

One more question, will it be okay to OC with 650? does the CPU wattage increase a lot when overclocking?

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)

 

[chaarlie]

So the 650w will be more than enough! Thanks for the help!

 

[ko888]

So the 650w will be more than enough! Thanks for the help!

Yes.