Question Rx 580 PSU 450w

May 15, 2019
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Hey
I can use sapphire Rx 580 pulse 8gb on 450w PSU?
My system :
Ryzen 2200g Vega 8 stock cooler
MB:Asus prime b450a
Ram :2x 4GB 2400 Hz hyperx fury
PSU: antec basiq 450w bp450ps
And only stock cooler and one fan that came with case

Thanks
 
You can, but that's not a very good PSU. Low-quality PSUs put your whole system at risk. If it were a good quality 450W it would be fine. If you're going to buy a new PSU, you might as well get a good quality 550W or better. I say 550W because 500W models are typically older, lower quality designs while 550W is newer and better quality.
 
Reactions: TJ Hooker
May 15, 2019
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I was thinking to buy sapphire Rx 570 itx mini that will be fine for my system? But I saw some test that Rx 580 take less power then Rx 570 mini that's why I tough I might buy Rx 580
 
No, the RX 580 does not take less power than the RX 570, if I'm NOT mistaken. For the RX 580, the Typical Board Power (Desktop) is rated 185 W, as per the specs posted on AMD's side. PSU recommendation is 500 W.

For RX 570, typical Board Power (Desktop) is 150 W, and the PSU Recommendation is 450 Watts. But these may also vary depending on the exact GPU make/model, reference cards vs Custom AIB.
 
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TJ Hooker

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View: https://youtu.be/etqXiDQSj5U
this video show that 580 take less power
Software power measurements aren't terribly accurate. There's no way a 580 running 120MHz faster with double the VRAM is using less than a 570. There may be some 570s with hefty factory overclocks that could draw more than a non factory OC 580, but the vast majority of the time a 570 will draw less.

As said above that PSU is iffy, but if you get a 570 and undervolt it you could probably get away with it for a while. How old is the PSU?
 
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May 15, 2019
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My CPU become a little bit hotter since I used the GPU from 55-60 to around 66
And GPU also hot tempture around 70-75c and the case it self from outside I can feel heat when I touch it just wanna know if it's normal I'm scared that my system in danger
 

Dreamevil55

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May 4, 2016
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Get some more cooling into your case. Polaris cards are hot, and if you bought the RX 570 ITX, well, a single tiny fan and small heatsink card will be hotter. But those temps are not alarming. Some more fans would do the job.
 
May 15, 2019
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Under volt will reduce GPU clock mine on +0 power and it's barly can get to 1244 hz
About the fans I will have enough power supply for add 2 fans with 450w PSU?
 

TJ Hooker

Illustrious
Herald
Under volt will reduce GPU clock mine on +0 power and it's barly can get to 1244 hz
About the fans I will have enough power supply for add 2 fans with 450w PSU?
No, undervolt will not reduce clock speed. If you lower the voltage too much it will just become unstable. In fact, if your card isn't maintaining 1244 MHz consistently that means it's probably hitting the power limit and throttling a bit. If that's the case, undervolting will actually improve performance by letting it maintain 1244 MHz consistently.
 
May 15, 2019
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Power limit on 0 stock on MSI Afterburnee and GPU run around 1150 MHz it can't reach to the 1244 if I increase it it stuck on 1244 but it become a lot hotter on stock 0 power it reach to 80c while gaming I saw others that have oc the GPU and they run on 70-75 and stock on 60
 

TJ Hooker

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Herald
Yes, increasing power limit will let it draw more power, which will cause it to heat up more. Reducing the voltage will reduce power consumption for any given frequency, allowing the card to hit higher frequencies without hitting the power limit and/or heating up more.

Do those other people have the exact same model (Pulse ITX) of graphics card? If so, they probably have better case airflow. Only having a single case fan is not optimal.
 
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May 15, 2019
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I undervolt it on amd software from 1150 volt to 930 it's stuck on 1244 Hz now and tempture 68c it was around 77c before
Just wanna ask if it's safe and why I need to undervolt it again every time I turn on my pc
 

TJ Hooker

Illustrious
Herald
As long as it's stable (no graphical artifacts, driver crashes, etc) you're fine. Even if it eventually turns out not to be fully stable, you just need to turn the voltage back up a bit.

If you've set the voltage in AMD Wattman it should be persistent; you shouldn't need to reapply every boot.
 

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