PSU Suggestion?

[DavePianist]

Hi guys. I've collected all my pc components except my PSU.

These are the components:

 

Corsair 280x Crystal White RGB mATX case

Asus ROG Strix Z370-G X2

Intel i7-9700K X1

Corsair Vengeance RGB Pro 8GB at 3200MHz X 2 (Should I make it 32GB? I only use overclocking to play games and bench marking, not video streaming or editing, etc.)

Corsair H115i RGB Platinum 280mm Liquid CPU Cooler

Intel 760p M.2 NVMe 512GB X1

Intel 545s 512GB ssd X2

Western Digital Green 2TB HDD X1

EVGA RTX 2080 Ti XC Ultra

 

I did a little calculation of my own and the total watt came out to be about 545W, so I'm thinking about getting a 750w PSU.

However, I see some youtubers build their gig using 95% same components as mine and they use 850W psu. I saw one even use a 1200w (wth?).

I just want to know that if I do plan to overclock the cpu and gpu a little (assuming the max is 5.0Ghz), how much watt of a psu should I get to future prove my purchase?

 

Many thanks!

[Conman1700]

Just upgraded recently, and I now have a 9900K and the same 2080 Ti XC Ultra. Under full synthetic load, both overclocked, they use about 650W MAX. With your CPU and a modest OC on the GPU, a 750 or 850W PSU should be fine. Keep in mind that most PSUs are more efficient around the 50% mark, and some have silent running mode for lower wattages, so you could even get something like a 1000W.

[BrinkGG]

Overclocking can add a lot of power draw. The easiest way to calculate it with overclocks is honestly to look at reviewers power draw for each part when overclocked. 

The 9700k maxes out at 220w overclocked if I remember GamersNexus' video correctly, and I believe the 2080 Ti uses 450w max overclock. You will most likely never hit both of these at once, but if you do plan on overclocking, I would at least go with a well rated 750w psu or better. (If you search "PSU Tier list" on the forum, you'll find the bonafide rating list. Go with the highest rated PSU series you are willing to pay for. 850 SuperNova G3 or something similar is usually a good deal.) 

[DavePianist]

I'm actually thinking about getting Corsair HX750i 750W 80 PLUS Platinum Certified, High Performance Power Supply. It's currently on sale with $40 off.