Is it a bad idea to use a 400W PSU with a rx5600xt?

[TooDamnCasual]

Computer uses a 10th gen i3 (65W) and a H410M H motherboard from gigabyte. Also no RGB

 

[Macro Device]

Broadly speaking, not good.

You will need to reassure yourself that:
• Your PSU delivers "honest" 400 watts (as in it's no Perdoon bollocks, it has to be a quality 400 W device);
• You are aware of how to undervolt;
• You undervolted your RX 5600 XT to the extent it never crosses the 100 W line.

You might lose about 5 to 15 percent performance after undervolting the GPU, yet this will guarantee your PC won't explode due to PSU overload.

The most high quality 400 W PSUs, though, run such GPUs just fine even without UV, especially if you have stabilisers and/or UPS.

 

[TooDamnCasual]

Broadly speaking, not good.

You will need to reassure yourself that:
• Your PSU delivers "honest" 400 watts (as in it's no Perdoon bollocks, it has to be a quality 400 W device);
• You are aware of how to undervolt;
• You undervolted your RX 5600 XT to the extent it never crosses the 100 W line.

You might lose about 5 to 15 percent performance after undervolting the GPU, yet this will guarantee your PC won't explode due to PSU overload.

The most high quality 400 W PSUs, though, run such GPUs just fine even without UV, especially if you have stabilisers and/or UPS.

That was very insightful. Mine is from EVGA, thou I think I'll just get a 500W one or above. Thank you!

 

[Bill_Bright]

Not enough information to answer that properly.

Missing information needed to make a proper answer include,

How many sticks of RAM?
How many and what type hard drives?
How many and what type case fans?
What else are you powering? Water cooling? USB devices?

 

[TooDamnCasual]

Not enough information to answer that properly.

Missing information needed to make a proper answer include,

How many sticks of RAM?
How many and what type hard drives?
How many and what type case fans?
What else are you powering? Water cooling? USB devices?

It has 2 sticks of 2666Mhz 8gb ram
One 480gb SSD and a 1tb HDD
One case fan (it came with the case so I don't know it's wattage, but it's a really simple one)
Only usb devices are the keyboard and mouse.
CPU uses the stock cooler from intel
No other stuff being powered

 

[santis]

Hi, is this your PSU? https://www.amazon.com/-/es/Fuente-alimentación-400W-0400-EVGA/dp/B00LV8TZAG?th=1
Which 5600XT do you have? Reference is 150w rated and 1x8 pin PCIe Power connector.
If both are true you should be fine with that 400w EVGA PSU.

 

[Dan.G]

It should work. There are a lot of PSU calculators online. I tried this one: Power Supply Unit (PSU) Calculation - Number #89675 | PC Builds (pc-builds.com)

 

[Macro Device]

How many sticks of RAM?

H410 mobo means it's no more than two low-speed 1.2 V modules of negligible wattage.

How many and what type hard drives?

H410 does also guarantee there's no way it's a server scale storage. Can disregard this, too.

How many and what type case fans?

This build barely needs a couple one-twenties so I doubt it makes for a huge difference.

What else are you powering? Water cooling? USB devices?

Such a basic build implies it's almost nothing special about peripherals.

That being said, estimated 70 W might even be an overkill.

70 W CPU + 150 W GPU + 20 W MB + 70 W ambient make for a 310 W peaking puter. Given OP's PSU is more than valid I'd advise going for mild UV (~120 W limit) and little power tuning in CPU (~55 W limit) and OP will be fine if wires in his house provide with stable electricity.

 

[R0H1T]

You'd want to leave some extra room for a possible future upgrade, unless you plan to stick with this for quite a few years down the line. A good quality 400W PSU should be enough but again you'll probably need to upgrade it later if you get more power hungry parts. I generally go at least 100-150W over the maximum expected power draw, even accounting for ~90% efficiency.

 

[Bill_Bright]

It has 2 sticks of 2666Mhz 8gb ram
One 480gb SSD and a 1tb HDD
One case fan (it came with the case so I don't know it's wattage, but it's a really simple one)
Only usb devices are the keyboard and mouse.
CPU uses the stock cooler from intel
No other stuff being powered

I agree that a "quality" 400W supply "should" be fine, but sadly, you've told us nothing about it, other than it is a 400W supply. We also don't know which i3. They are not all equal.

I use and recommend is the eXtreme OuterVision PSU Calculator. This will calculate your minimum needs and recommend a suitable size for those needs.

Plug in all your current components. Be sure to plan ahead and include all the hardware you think you might add in 2 or 3 years (extra drives, bigger or second video card, more RAM, etc.).

I recommend setting CPU utilization to 100% and Computer Utilization Time to 16 hours per day. These settings will help compensate for component aging, and add a little extra padding to the results. This will also result in a little cooler and quieter operation.

IF me, I would want something a little bigger than 400W. ~550W is probably where I would start looking. This will allow the PSU to run closer to the more efficient 50% load mark for cooler and (depending on supply) quieter operation. It will also give you a little extra headroom in case you want to add or upgrade your HW.

 

[BetrayerX]

Simple answer: if the PSU is good quality, it should be fine.

But yea, Undervolting will help, taking into account the rest of the system will do too.

I have a Battery that monitors power consumption. I usually put machines to check the idle and full load. There is simpler hardware that might tell you that as well.

Also, it is important to note that even if a machine like yours, lets say, uses ~385W (pulling the number out of my ass as an example), which technically is below the 400W limit, Also take into account the temps in the area and the time stressing the equipment.

 

[TooDamnCasual]

Just addressing some things (which I should have done since the beginning):
My PSU is the 400W 100-N1-0400-L model from EVGA, and the CPU is the i3-10105 (other specs in the posts above).

After a bit of consideration, I decided to undervolt the video card and use the 400W while I don't get a more powerful one during black friday.

Thanks to you all

 

[Luke357]

Just addressing some things (which I should have done since the beginning):
My PSU is the 400W 100-N1-0400-L model from EVGA, and the CPU is the i3-10105 (other specs in the posts above).

After a bit of consideration, I decided to undervolt the video card and use the 400W while I don't get a more powerful one during black friday.

Thanks to you all

That machine will run fine on a 400W unit so you should be fine as long you don't add anything more than a hard drive or two. Happy gaming!

 

[dirtyferret]

I agree that a "quality" 400W supply "should" be fine,

this

Also no RGB

how does it work without it???

 

[eidairaman1]

Just addressing some things (which I should have done since the beginning):
My PSU is the 400W 100-N1-0400-L model from EVGA, and the CPU is the i3-10105 (other specs in the posts above).

After a bit of consideration, I decided to undervolt the video card and use the 400W while I don't get a more powerful one during black friday.

Thanks to you all

Not a true 400w unit its a 360W unit from 2015 by HEC.

https://www.realhardtechx.com/index_archivos/Page2293.htm

Upgrade the psu