Question What size PSU do I need?

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ms.caulk

Dec 15, 2023
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I'm building a system for a friend, and I'm not sure the PSU they chose is going to be enough.

Here are the specs:

13600k
Gigabyte Z790 Aorus Elite AX MB
64 GB TeamGroup Team Force Delta DDR5 6000 RAM (2 x 32gb)
ASUS TUF Gaming RTX 4070ti OC
Thermaltake ToughLiquid Ultra 280mm AIO
4 x 2TB NVME drives

He's picked out the Lian LI SP850 PSU (building in a 011 Mini case).

I think he should get 1000 watts.

What do you guys think?
 
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ms.caulk said:
I'm building a system for a friend, and I'm not sure the PSU they chose is going to be enough.

Here are the specs:

13600k
Gigabyte Z790 Aorus Elite AX MB
64 GB TeamGroup Team Force Delta DDR5 6000 RAM (2 x 32gb)
ASUS TUF Gaming RTX 4070ti OC
Thermaltake ToughLiquid Ultra 280mm AIO
4 x 2TB NVME drives

He's picked out the Lian LI SP850 PSU (building in a 011 Mini case).

I think he should get 1000 watts.

What do you guys think?
Click to expand...
Shop for a minimum 750w psu......bigger won't hurt....with at least a 7 yr warranty.
When you find something read the reviews.
 
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There are a number of O11 mini cases. exactly which one?
I happen to like the O11 air mini.
Some may require sfx and some ATX sized power supplies.
Love the Lian li quality.

Some thoughts:

13600K and 4070ti seem to be an appropriate combo.

Here is one chart for sizing a psu:
https://dlcdnets.asus.com/pub/ASUS/Accessory/Power_Supply/Manual/RECOMMENDED_PSU_TABLE.pdf
You will find that the price difference between 750w, 850w and 1000w are not that great.
Over sizing is not bad, the psu will only draw the power demanded of it, regardless of the max power.
And, the most efficiency happens when operating in the middle of the range.
Then, also the 13600K can run much stronger cards, if not now, then into the future.
For that reason, look to buy much stronger.

First determine if the selected case needs SFX or can handle ATX size.The key to any psu purchase is quality.
Quality tier lists exist, but they are just opinions.
My test is to look at the warranty.
7 years good, 10-12 years are very good.
For example, a Seasonic vertex 850w unit with a 12 year warranty is $214, while the 1000w version is $25 more:
https://www.newegg.com/seasonic-vertex-gx-850-850-w/p/N82E16817151258?Item=N82E16817151258

Corsair RM units are in the same quality category.

Do not listen to13600K fud.
It is not a hot chip, particularly when gaming.
View: https://www.youtube.com/watch?v=dNFgswzTvyc


Nor do you need a aio, particularly when a good air cooler will cool just as well.
An aio cooler will fail sometime, guaranteed.
If not from the mechanical pump or a clog, then from air intrusions through the tubes.
Plan on 5 years.

Seems foolish to me to fill up all your m.2 slots with 2tb drives.
Buy one of 2tb or 4tb for your C drive, and use standard 2.5" ssd devices for bulk storage.
You will not see any difference. These experts could not:
View: https://www.youtube.com/watch?v=4DKLA7w9eeA
 
Upvote 0 Downvote
The O11 Air mini takes a ATX psu up to 200mm long:
lian-li.com

O11 AIR MINI - LIAN LI is a Leading Provider of PC Cases | Computer Cases

EXTREME AIRFLOW QUALITY MATERIAL MODULAR BACK PLATE UP TO 6 SSD OR 3 HDD + 2 SSD ATX PSU COMPATIBLE DUAL CHAMBER DESIGN VERTICAL GPU BACK PANEL (OPTIONAL) GERMAN ENGINEERED https://www.youtube.com/watch?v=PvaRGVPWlh0 EXTREME AIRFLOW SUPER FINE MESH FRONT, TOP AND SIDE PANELS The mesh design on...
lian-li.com lian-li.com

Has the case already been purchased?
Is there a link to it?
 
Upvote 0 Downvote
geofelt said:
There are a number of O11 mini cases. exactly which one?
I happen to like the O11 air mini.
Some may require sfx and some ATX sized power supplies.
Love the Lian li quality.

Some thoughts:

13600K and 4070ti seem to be an appropriate combo.

Here is one chart for sizing a psu:
https://dlcdnets.asus.com/pub/ASUS/Accessory/Power_Supply/Manual/RECOMMENDED_PSU_TABLE.pdf
You will find that the price difference between 750w, 850w and 1000w are not that great.
Over sizing is not bad, the psu will only draw the power demanded of it, regardless of the max power.
And, the most efficiency happens when operating in the middle of the range.
Then, also the 13600K can run much stronger cards, if not now, then into the future.
For that reason, look to buy much stronger.

First determine if the selected case needs SFX or can handle ATX size.The key to any psu purchase is quality.
Quality tier lists exist, but they are just opinions.
My test is to look at the warranty.
7 years good, 10-12 years are very good.
For example, a Seasonic vertex 850w unit with a 12 year warranty is $214, while the 1000w version is $25 more:
https://www.newegg.com/seasonic-vertex-gx-850-850-w/p/N82E16817151258?Item=N82E16817151258

Corsair RM units are in the same quality category.

Do not listen to13600K fud.
It is not a hot chip, particularly when gaming.
View: https://www.youtube.com/watch?v=dNFgswzTvyc


Nor do you need a aio, particularly when a good air cooler will cool just as well.
An aio cooler will fail sometime, guaranteed.
If not from the mechanical pump or a clog, then from air intrusions through the tubes.
Plan on 5 years.

Seems foolish to me to fill up all your m.2 slots with 2tb drives.
Buy one of 2tb or 4tb for your C drive, and use standard 2.5" ssd devices for bulk storage.
You will not see any difference. These experts could not:
View: https://www.youtube.com/watch?v=4DKLA7w9eeA
Click to expand...
It's the Snow White case, which only takes SFX.

As for the parts, it's not my build. He wants to keep separate drives for work and games (Personally I'd use two 4TB drives, and a 1TB boot/program drive). And he wants an AIO (again, not my choice)
 
Upvote 0 Downvote
geofelt said:
The O11 Air mini takes a ATX psu up to 200mm long:
lian-li.com

O11 AIR MINI - LIAN LI is a Leading Provider of PC Cases | Computer Cases

EXTREME AIRFLOW QUALITY MATERIAL MODULAR BACK PLATE UP TO 6 SSD OR 3 HDD + 2 SSD ATX PSU COMPATIBLE DUAL CHAMBER DESIGN VERTICAL GPU BACK PANEL (OPTIONAL) GERMAN ENGINEERED https://www.youtube.com/watch?v=PvaRGVPWlh0 EXTREME AIRFLOW SUPER FINE MESH FRONT, TOP AND SIDE PANELS The mesh design on...
lian-li.com lian-li.com

Has the case already been purchased?
Is there a link to it?
Click to expand...
He bought the Snow White, which only takes an SFX
 
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ms.caulk said:
011 dynamic mini Snow white. Only takes SFX

https://www.amazon.com/Lian-Li-Dynamic-Mini-White/dp/B09138FCV5/ref=sr_1_28?keywords=Lian+Li&qid=1704554900&rnid=2941120011&s=pc&sr=1-28&th=1
Click to expand...
Well, that clears things up, you have a O11 Dynamic mini which is different from other O11 mini versions.
It is a bit unfortunate because top quality high capacity power supplies are not very common.
This

ASUS ROG Loki SFX-L 1000W may do the job with a 10 year warranty.​

It is 125mm long, so check that it fits.
 
Upvote 0 Downvote
geofelt said:
Well, that clears things up, you have a O11 Dynamic mini which is different from other O11 mini versions.
It is a bit unfortunate because top quality high capacity power supplies are not very common.
This

ASUS ROG Loki SFX-L 1000W may do the job with a 10 year warranty.​

It is 125mm long, so check that it fits.
Click to expand...
My concern with the SFX power supplies is temps. But with a 10 year warranty, that might not be bad
 
Upvote 0 Downvote
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