Wattage Differences... IS IT SAFE?

[Narigaur]

So I'm building my own computer for the first time ever and I used the Cooler Master Power Supply Calculator to see how much power I need for my computer. The specs are supposed to be:

CPU: Intel Core i5-4590

RAM: 1 8GB DDR3 Module

GPU: AMD Radeon R9 380

Storage: 1 SATA3 7200 RPM HDD (although it didn't have an option for a SATA3 drive)

Optical Drive: 1 DVD+RW Drive

 

The final score came up to 671W Recommended Minimum.

BUT the power supplies they have at my local computer store that I thought was good were either the 650W or 700W power supplies.

Now, is it safe for get a power supply with a slight wattage difference, and if so, which power supply should I go for?

 

[Samppa221]

Get the 650w the 650 is the maximum wattage it can output it outputs as much as the computer asks for.

 

 

When i calculate the wattage the recommended wattage is  470w. So the 650 is more than enough

[Samfisher]

So I'm building my own computer for the first time ever and I used the Cooler Master Power Supply Calculator to see how much power I need for my computer. The specs are supposed to be:

CPU: Intel Core i5-4590

RAM: 1 8GB DDR3 Module

GPU: AMD Radeon R9 380

Storage: 1 SATA3 7200 RPM HDD (although it didn't have an option for a SATA3 drive)

Optical Drive: 1 DVD+RW Drive

 

The final score came up to 671W Recommended Minimum.

BUT the power supplies they have at my local computer store that I thought was good were either the 650W or 700W power supplies.

Now, is it safe for get a power supply with a slight wattage difference, and if so, which power supply should I go for?

With that rig you'll be fine with a 500w PSU.

[Amazingasian]

Go 650. I don't see that computer using up more than 500W on load.

[MrSuperb]

such a system would not even hit 350Watt under full load ...

 

rather get a higher quality 500Watt PSU, than a lesser quality 650/700Watt PSU

[Lolucoca]

Go for the 650W. It's more than enough.

[Enderman]

PSUs will only output as much power as your PC uses

if the PSU is more wattage thats not a problem, it wount output that much

you always want a PSU that can do more than what your build needs

 

those wattage calculator are always wrong so dont pay attention to the 671W

your build will use less than 400

[Megahurt]

The rated wattage on power supplies are maximum they can output, not what they output all the time.

 

At idle your pc will draw several times less power than at load, you can't buy a power supply that is too powerful, the only reason you wouldn't is price.

[STRMfrmXMN]

So I'm building my own computer for the first time ever and I used the Cooler Master Power Supply Calculator to see how much power I need for my computer. The specs are supposed to be:

CPU: Intel Core i5-4590

RAM: 1 8GB DDR3 Module

GPU: AMD Radeon R9 380

Storage: 1 SATA3 7200 RPM HDD (although it didn't have an option for a SATA3 drive)

Optical Drive: 1 DVD+RW Drive

 

The final score came up to 671W Recommended Minimum.

BUT the power supplies they have at my local computer store that I thought was good were either the 650W or 700W power supplies.

Now, is it safe for get a power supply with a slight wattage difference, and if so, which power supply should I go for?

First: Never use PSU calculators. They're wrong, especially about your PC. It'll hit less than 300W under load...

 

Second, EVGAs 550W GS or Antec's High Current Gamer are good options for ya.