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Is my 400w PSU enough for my RX 580?

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elpapimejor

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Hello, this is my first post here at the TPU forums,

I have recently bought an used (probably mining) RX 580, and I currently have a dell prebuilt pc (optiplex 990) with an i7 2600, 3 4gb sticks of ddr3 ram, 2 3.5inch 7.2krpm HDD's, and an EVGA GTX 650 Ti 2gb (Been running this for the past 2 years with my current PSU) (think its an SC version.)

I currently have this EVGA 400w PSU (https://www.amazon.com/EVGA-Warranty-Power-Supply-100-N1-0400-L1/dp/B00LV8TZAG,) which has both 6+2pin and 6pin PCIe power connectors. And I was wondering if it would be okay to run all these components (not the 650 Ti but the RX 580) with this PSU? Would there be any problems?
 
Yes.
 
650 TI's nominal maximum is 110w, RX 580 is almost twice that (around 190). 650TI is 6pin, 580 is 6+8 pin. I'd definitely upgrade, 400 is too low in my opinion for a stable system with this hardware. 550 is good enough, 650w (something like RM650x from corsair) is perfect.
 
580 is pretty power hungry, I wouldn't try running it on any 400w PSU, let alone one of EVGAs worst units. It might work, and if it doesn't, it probably won't do any damage, but why risk it? Buy a new quality 450W PSU minimum, imo.
 
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I wouldn't risk it, when psu gos bang thay tend to take other things with them. a 550wpsu would be the lowest id feel safe a 600w would be better as long as its a tidy make "corsair, seasonic ect.
 
You will probably be alright if that PSU is a Quality PSU (which I don't know anything about that model). I would be more comfortable with a quality 500 watt PSU though.

This measurement was taken using a high end overclocked CPU


Load Power Consumption - Crysis 3




And also depends on which RX 580 model you are looking at. Some of the overclocked models use more watts than others.


Edit: That's a pretty low score from jonnyguru that dirtyferret posted a link to in post #5
I don't think I would try it with that PSU having seen that review.
 
I am getting ready to plop an exmining 580 into a mini-itx 3700x build that currently has a 450w. I am likely going to swap it out for the 600 because I have it sitting there as well. However, I'm lazy and don't really feel like pulling apart the system with the 600 in it.
 
Thanks to everybody for the quick replies,

I just got out of my computer maintenance class, and my teacher was kind enough to give me a 500w PSU (Cooler Master Extreme Power Plus 500W - RS-500-PCAR-A3,) but turns out the psu doesnt have an 8pin connector, only a 6pin :'(
 
elpapimejor said:
Thanks to everybody for the quick replies,

I just got out of my computer maintenance class, and my teacher was kind enough to give me a 500w PSU (Cooler Master Extreme Power Plus 500W - RS-500-PCAR-A3,) but turns out the psu doesnt have an 8pin connector, only a 6pin :'(
Click to expand...
Use molex->pci-e adapter which you can get cheap for like 1-2$/eur.
 
you may find that running it on that 500W PSU may have problems maintaining enough current seeing as it's only 18A on either the 12V1 or 12V2 lines I know they state the card is only 185W TDP but I've seen mine pull 220W while gaming
 
xtreemchaos said:
I wouldn't risk it, when psu gos bang thay tend to take other things with them.
Click to expand...
While possible, that is pretty rare these days - especially with PSUs from major makers like EVGA. The more likely scenario is the PSU will simply stop outputting voltage. That's certainly what is supposed to happen when a PSU fails. Of course, that assumes it is not other wise damaged.

@elpapimejor - I agree with dirtyferret and that 400W EVGA is adequate - but just barely. Since it is rare for the CPU, GPU, all drives, fans, RAM, and motherboard to pull maximum power at the exact same time, it is unlikely you will over load that PSU. But you are still pushing it. It is likely you will be running that PSU near capacity much of the time and if your case cooling is not providing lots of cool air flowing through the case, that PSU may be running pretty warm most of the time. That in itself is not bad, but could mean the PSU's fan is running near full speed - and maximum loudness - much of the time too. And I hate fan noise.

This heat issue will be compounded if your ambient (room) temperatures are high where you are too.

A nice 550 - 650W PSU (and I like EVGA SuperNova or Seasonic Gold supplies) would be plenty big giving you enough headroom for future upgrades while not stressing the supply thus allowing the PSU fan to run much slower (or even off) and thus much quieter too. Did I mention I hate fan noise?
 
So, if I run the card on the 400w PSU for lets say about 3-6 months (While i get money for a new one) I should be okay
 
elpapimejor said:
So, if I run the card on the 400w PSU for lets say about 3-6 months (While i get money for a new one) I should be okay
Click to expand...

No one has a crystal ball but likely.
 
elpapimejor said:
So, if I run the card on the 400w PSU for lets say about 3-6 months (While i get money for a new one) I should be okay
Click to expand...
Just don't overclock it or your cpu in fact if you wanted to err on the side of caution, you could undervolt and clock it down to around 1250mhz core and it would probably only pull around 160w whilst still giving you nearly the same performance and putting less of a strain on your psu for peace of mind ;)
 
elpapimejor said:
So, if I run the card on the 400w PSU for lets say about 3-6 months (While i get money for a new one) I should be okay
Click to expand...
Yeah, no crystal ball here. For normal computer use (surfing the net, updating social media, creating emails and Word documents, viewing videos, etc.), and assuming you have good case cooling (to include decent ambient temps) and you keep the interior clean of heat trapping dust, then heat and power should not be an issue.

But if you start really taxing the computer, then it is anyone's guess.

Of course, to be safe, the wise option might just be to stick with the GTX 650 Ti until you get your new PSU.
 
Bill_Bright said:
the wise option might just be to stick with the GTX 650 Ti until you get your new PSU.
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^^This^^
I would plug the mining card in to see if it works, then pull it out and save it for when you can properly power it.

Edit:
Consider that the PSU is the cornerstone, (or foundation if you will) for any PC build. Getting a quality PSU means years of trouble-free use out of it.
Whenever I build a PC, I usually buy the PSU a few months before I plan to build. I choose a little more power than what I'll need, and I choose a brand that I know is made well.
I like Seasonic branded PSUs the best. I've had the least problems over the years with them. I have some EVGA units and they've been good for me as well.

Years ago I had a PSU fail in my computer. When it died, I lost my motherboard, memory, GPUs (two of them), and a sound card. Most of what I lost was only a few months old, and I couldn't replace it for a few months. The only RMA that worked out of all of those components was the GSKill RAM. everything else was a total loss.
It was an Antec brand unit that did me in, and I've never looked to them for anything again.

I can't stress this enough.
Spend the money on a high-quality PSU that has a little extra juice to cover your future upgrades as well.
 
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dirtyferret said:
It's "capable" of powering your specs with the RX580 but if it was me, I would start saving for a new solid PSU sooner rather then later

EVGA 400 N1 Power Supply – Page 6 – JonnyGURU.com

www.jonnyguru.com www.jonnyguru.com
Click to expand...


Basically this.

Would that power supply run the RX580? Probably. Would I trust it to power my computer? No, I wouldn't put that PSU in any computer.

Decent power supplies are cheap these days, but replacing your entire computer because your dodgy power supply died and took everything in your computer with it isn't cheap.

Bill_Bright said:
While possible, that is pretty rare these days - especially with PSUs from major makers like EVGA. The more likely scenario is the PSU will simply stop outputting voltage. That's certainly what is supposed to happen when a PSU fails. Of course, that assumes it is not other wise damaged.
Click to expand...

You'd hope, but this thing has been costed down to the point that is doesn't even PFC. When I see a unit that is so cheaply made it doesn't have PFC and can't even get past 80% efficiency, I don't really trust it has a proper OCP circuit or other protection circuits. I just don't trust them, eVGA name or not.
 
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64K said:
You will probably be alright if that PSU is a Quality PSU (which I don't know anything about that model). I would be more comfortable with a quality 500 watt PSU though.

This measurement was taken using a high end overclocked CPU


Load Power Consumption - Crysis 3




And also depends on which RX 580 model you are looking at. Some of the overclocked models use more watts than others.


Edit: That's a pretty low score from jonnyguru that dirtyferret posted a link to in post #5
I don't think I would try it with that PSU having seen that review.
Click to expand...

Just grab a Seasonic or Super Flower based 550 Watt or higher, EVGA have them or just look for a Seasonic Unit.

http://www.realhardtechx.com/index_archivos/Page2293.htm, max current draw is 30 Amperes
 
pretty much enough, 400w, but such low quality psu im not sure how long it can stand that rx570, make sure to pay for known brand psu oke:)
 
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