Insane power draw on online wattage calculators

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I have used Seasonic wattage calculator to estimate the power draw in a particular configuration in the following link: https://seasonic.com/wattage-calculator

Here is a screenshot of a configuration. It is quite similar to my current configuration:

oPxIVQX.png

I keep reading on various online platforms that 650W is more than enough for this particular configuration. According to the screen shot, 650W is clearly not enough. I did not even put an overclocked 2080 Ti into the configuration. If I had done it, the power draw in the screenshot would have been like 800W, I guess.

I am about to go insane. Why is there no objective information about this topic? Youtubers keep ignoring this topic. "Knowledgeable people" on online platforms keep giving conflicting info. What should we do?
 
I don't see the problem?

You have a power hungry OC'd cpu and a power hungry gpu and it is nice to have some headroom because psu's do degrade over time & it is more efficiant to use a psu that is capable of more than what you actually need. For sure its not like the system will draw max ammount very much, but I would like to see what it does draw at max load with a watt-o-meter plugged into the wall.

850w sounds about right for me with that system. Why skimp out on the psu, do you just want to spend less money or?
 
that power calculation looks correct.
an oc-ed 9900k can pull 210-250w.
an oc-ed 2080ti can pull 300-350w.

250+350 = 600w.

you'd want to run a psu between 50-80% load = 750w (80%) to 1200w (50%)
1200w is a bit pointless...750w should be okay. 850w if you want a wee bit more headroom
 
9900K can draw 200W even without any manual overclocking if BIOS/motherboard chases advertised boost clocks instead of sticking to advertised TDP.
(and cooling system is extreme enough to keep temps from stopping boosting)
Don't need Prime to get crazy high readings when manually overclocked to 5GHz:
We measured 137W (232W) during the Cinebench test, and we topped 145W (241W overclocked) under the larger Blender workload. We even pushed past 120W (198W overclocked) with various CAD plug-ins for Creo and SolidWorks.
Anything fully multithreaded can basically trash that Intel's "wannabe" 95W TDP, unless BIOS/motherboard follows it strictly.
https://www.tomshardware.com/reviews/intel-core-i9-9900k-9th-gen-cpu,5847-11.html

And those are CPU's "Package Power" readings without VRM losses.
So add ~20% extra on them.

And RTX 2080 Ti is pretty much 300W card at stock settings.
https://www.techpowerup.com/reviews/Zotac/GeForce_RTX_2080_Ti_AMP/31.html


If you're going to pay arm, both legs and half the internal organs for those parts, which aren't going to be at top for many years, you should have no problems in paying for good PSU, which can be used for whole decade.
Heck, would consider anything less than 80+ Titanium (like Seasonic Prime) as penny pinching compared to those exorbitantly priced parts.
And that would still be cheap in comparison and not going to get technically old in very long time!
Unlike 8c/16t which might become basic level in spring, along with 16c/32t becoming top high end...
(I guess we'll find out that during second day of CES)
 
Thank you so much for your replies. On overclockers.com forums and reddit, some say 650W is enough. I am confused.
250+350 = 600w.

650w is "enough" to run both the 9900k + 2080ti at full tilt...but not taking into account PSU wear/degradation over time (ie, you'd probably be using your PSU over the next 5-6 years...maybe more?)
but the question: would i want to run so close to the limit?
answer: probably not.

you'd want to run a psu between 50-80% load = 750w (80%) to 1200w (50%)
1200w is a bit pointless...750w should be okay. 850w if you want a wee bit more headroom
 
Thank you so much for your replies. On overclockers.com forums and reddit, some say 650W is enough. I am confused.

You're confusing "enough" with "recommended". A 650W PSU will provide enough to power your computer but I recommend a 750W or higher. A 650W PSU will actually use more electricity than an 750W PSU because power supplies are more energy efficiant when their load is 80% or less. You never want a PSU to be near it's limit. Think about how hot you get when you're working close to your limit.

Also, what if you upgrade to a 3080Ti when it comes out and discover it uses more power? You would have to replace your PSU.

When buying a PSU, it's better to buy more than enough.
 
It says this for my pc:
Load Wattage: 1142 W

I’ve been comfortably running it off a 750W supply for 3 years so far without an issue. I think that calculator has a very large safety margin.
 
Don't fret about it too much. Having too much wattage doesn't harm anything. Always be a little conservative with what you think your system will draw at full OC'ed load, and aim for a PSU safely above that. With your ~650W configuration I'd aim for a decent efficiency 850W PSU. That will give you piece of mind, as well as cover any sort of age-related deterioration you typically expect with PSUs after substantial use.
 
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