Question Is 750W enough for this build?

[Leedood]

Hello,

I'm wondering if 750W is going to be enough for the following build:

• Intel Core i7 13700K
• 12GB Palit GeForce RTX 4070 Ti
• Gigabyte Z790 Gaming X AX
• 32GB Kingston FURY Beast DDR5
• PHANTEKS Glacier One 360
• 1x SSD SATA, 1x M.2 NVMe SSD, 1x SATA 7.2K RPM
• 4x 140m fans

Thank you!

 

[punkncat]

Your 4070 ti states a minimum of 700W. Going to want a good one.

Probably not a bad idea to use something like Power Supply Calculator - PSU Calculator | OuterVision to put your parts in and see what it spits out as a recommended PSU (power). I wouldn't pay too much attention to the specific brand/type it will also suggest.

 

[COLGeek]

Maybe. What is the make/model of the PSU in question?

 

[Leedood]

Your 4070 ti states a minimum of 700W. Going to want a good one.

Probably not a bad idea to use something like Power Supply Calculator - PSU Calculator | OuterVision to put your parts in and see what it spits out as a recommended PSU (power). I wouldn't pay too much attention to the specific brand/type it will also suggest.

On the website it says the load Wattage would be 675W. Recommended UPS rating 1250 VA and PSU Wattage 725W.

 

[Leedood]

Maybe. What is the make/model of the PSU in question?

It's the 750 Watt be quiet! Straight Power 11 Modular 80+ Platinum.

 

[COLGeek]

It's the 750 Watt be quiet! Straight Power 11 Modular 80+ Platinum

Should be fine.

 

[geofelt]

Usually, there is minimal pricing difference between 750w/850w and so on.
While the nominal load might be ok, modern graphics cards can have some high peak demands.
I would pay a bit more for 850w or even 950W.
A psu will only use what is demanded of it, regardless of the max capability.

And, look for a Seasonic focus or corsair rmx with a 10 year warranty.

 

[Leedood]

Usually, there is minimal pricing difference between 750w/850w and so on.
While the nominal load might be ok, modern graphics cards can have some high peak demands.
I would pay a bit more for 850w or even 950W.
A psu will only use what is demanded of it, regardless of the max capability.

And, look for a Seasonic focus or corsair rmx with a 10 year warranty.

Alright, I'll take that into consideration, thanks.
Out of curiosity, what does happen if PSU can't provide enough power?

 

[geofelt]

Alright, I'll take that into consideration, thanks.
Out of curiosity, what does happen if PSU can't provide enough power?

If the psu can't handle a spike in power demand, I would expect the game to fail or exhibit flaky symptoms.
No permanent damage.

 

[Karadjgne]

Figure a 4070ti can spike over 300w, so 350w just for gpu. 100w for the pc, 250w for the cpu.

That's 700w flat out to the wall with everything, so a Good 750w will be no issues, gaming generally doesn't see much usage beyond @ 70%. The only thing I'd be looking for is a psu that can take the spikes, and not trip protections.

The Corsair RMx series and higher use a doubled up OCP, one for long constant draws and another for short duration spikes. That idea has basically been copied by several new/fixed designs from others, as a way to get around nvidia rediculousness. For BeQuiet, I'd be looking more at the Dark Power than Straight Power, or a New series, not a psu that's 5 years old design.

Psus are strange animals, there's no telling exactly how any particular one will behave. Power consumption is very rarely ever a constant, psus are generally rated lower than actual for short duration maximum, the rating is for 100% constant.

So you could blackscreen, bluescreen, crash, lockup, shutdown or keep gaming and be never the wiser to just how close you really got. It'll all depend on the psu, it's rating, the pc loads etc.