What size PSU do I actually need?

Chris [BEANS]

Chris [BEANS]

Chris [BEANS]

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So, I know this isn’t super straightforward because I’m potentially asking about products that don’t exist yet, but I assume all components for a generation or three will have similar requirements...

I’m planning a build in the next few months, and the one thing I know little about is the size of PSU I’ll actually need.

I’m waiting to hear whether Ryzen 3000 will be suitable, and if not I’ll be going for a 9700k.
I’ll almost certainly go for a 2080Ti and I’d like to be in a position to upgrade that over the next few years.

I’ll only ever have a single GPU, and although I’m not an overclocker, I may well have a play around with a modest overclock.

No mechanical drives or anything else worthy of note.

Am I right in thinking 800w should be fine, or should I go higher?

Cheers for your time
 
For a GTX 2080ti you should look at a minimum 650w psu from a quality brand. I would take a Ryzen 3000 over a 9700k any day and I wished that I had the patience to wait. With the failure rate of 2080ti's I personally wouldn't go near one and that's not even taking into account the ridiculous price.
 
Non-reference 2080 Tis are 300W class cards.
For gaming CPUs rarely reach 100W power draw.
Throw in 50W for rest.

Though Intel's Skylake rebrandings have crazy power draw when fully 100% stressed and not capped by BIOS.
https://www.tomshardware.com/reviews/intel-core-i7-9700k-9th-gen-cpu,5876-2.html
https://www.tomshardware.com/reviews/intel-core-i9-9900k-9th-gen-cpu,5847-11.html

Even 12 core Zen2 is likely going to have lower power draw.
In CES demo 8 core Zen2 engineering sample matched 9900K's Cinebench performance at ~50W lower power consumption.
Also pricing should be lot better than in these overpriced and horribly overpriced full of vulnerabilities old design CPUs.
Nvidia has been also competing in buttrape and robbery pricing, with ridiculous prices per performance.
 
Blinding, thanks guys.

So looks like I’ll go with an 800w Corsair PSU as I can get the sleeved cables I want, to go with RMX series, and seems 800w will be plenty.

I’ll also take on board what you’ve said and wait for Zen 2...

Cheers (thumbs up emoji)

Edit: seems an 800w as above doesn’t exist. I’ll go with the 750 80+ Gold unless it’s really worth going for the 850w...

https://www.overclockers.co.uk/cors...lar-power-supply-cp-9020179-uk-ca-23w-cs.html
 
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