How many watts do I need?

[BlueMaster]

I am about to buy a new workstation.

 

The system contains

TR 1950x, with a more or less standard fan (Not going to overclock like crazy)

2x asus 1080ti Strix

64GB DDR4 3200 MHz / PC4-25600 (Are going to upgrade to 128 at some point)

On a Gigabyte X399 AORUS Gaming 7

Some SSD's and m.2 disks.

 

I am doing very heavy 3D work, in houdini, and I am rendering with octane, so only on the GPU's (Going to simulate on CPU or render on GPU almost day and night)

 

When I type my information in to Outervision's power supply calculator, it recommends a 1200W power supply. I then saw a review of the "Corsair HX1200i" where they only recommended 1200W if you have 4 hi end graphic cards.

 

I really don't know much about how the hardware draws power, when combined.. Maybe someone can give me a pointer of what I really need for this setup?

[Electronics Wizardy]

1000w will be fine if you aren't doing crazy overing clocking, but id go 1200 if you got the money or want to overclock.

[PSUGuru]

PCPP Calculator says around 800 watts, adding in storage devices and such, you're looking at around 500-600 watts pulled from the wall under heavy loads.. I recommend either a 750 watt PSU, or, to be safe, a 850 watt PSU.

[BlueMaster]

Okay, thanks guys. So if I would go with about 1000W just to be sure. Is the Corsair HX1000i, something you could recommend? I am a bit afraid to buy something wrong...

[Mr.Meerkat]

The 1950x@stock consumes about 180W underload (or about 325W when OCed to 3.9GHz) while a 1080ti underload consumes about 275W (or 300+ if you overclock). 1000W is perfectly adequate if you're not overclocking however the second you overclock both the 1950x and 1080tis, a 1000W PSU will stuggle if you put both the CPU and GPU under a synthetic-like load at the same time (but under a more normal load, it should be fine). 

1 minute ago, BlueMaster said:

Corsair HX1000i

Dewit, its a very good power supply. Another excellent option is Seasonic's 1000W prime (Plat rated ver.) which costs slightly more but is better than the HXi.