460W enough for i5 8400 and rx580

[I HATE DUST]

I have a i5 8400 and I am going to change my GPU to a second hand asus strix rx580 8GB dual fan. Is a Cooler Master Elite 460 enough to support it?

[Rumpelcrutchskin]

I would not use it. It`s ancient trash and doesn`t have 6+2 pin or 8-pin PCI-E connector needed for RX 580. It has only one 6-pin PCI-E connector so you would need to use adapter cable and this is another hazard on top of already trash quality PSU.

[Viking2121]

It would be fine, the RX 580 recommended is only 450 watts, the 8400 sips power, but you will need an adapter and depends on what version of card you have will dictate what adapter you would need, Though that also brings in another can of worms, them adapters are typically not recommended, they can melt, catch fire, the works, they just can't handle the power a 6 pin needs let alone an 8 pin.

Get another PSU and call it a day, the system should not use more than 450 watts, but get a name brand PSU thats decent enough quality, you don;t need to spend an arm and leg for decent 500watt unit.

[Bad 💀 Motha]

As long as that PSU has proper hard-wired connectors for PCIE GPUs then you're fine. DO NOT use any adapters for this.

The recommended is 450W, but that is for an entire system, not the GPU alone. So I don't see a problem. If it IS a problem you will know when you try to run things like 3D Benchmarks or Games cause the system will auto reboot or shutdown if your PSU is not enough.

[GOD RAYS ON ULTRA™]

I used adapters before without issues. I never liked to though, and I only did it because I didn't have a proper PSU.

If you can see inside your PC then I definitely wouldn't use an adapter, as it would be visible and be a terrible eye sore. I think 460 is enough. I'm using 460 EVGA for my GTX 1070/Xeon processor build and it's totally enough.

But it's not really the wattage, it's really about the amps and how many the 12 volt rail has. For example, a cheap 460 watt won't really be 460 watt. Some of them if you look at the efficiency label won't give you full wattage.

So, you have a 460 watt PSU but, does it really supply 460 watt so it's available for 12 volt rail? My EVGA supply 458 watt out of 460 to the 12 volt rail. My 1000 watt EVGA supplies 999.8 watt to the 12 volt rail.

Look at the efficiency label and compare watts there to the 460. A cheap 460 watt PSU will not supply that to the 12 volt rail. It will only give you like 380-400 watt. The rest isn't available despite having 460. This is the difference between good and bad PSU. It's all in the efficiency label.

I don't buy a PSU that is advertised without the efficiency label. This type of company is hiding the efficiency label for a reason. It's not efficient and they don't want you to see it. They don't want you to see that their 500 watt PSU is really only a 400 watt when it comes to 12 volt rail.

[r.linder]

No, official recommendation is 500W, RX 580s can draw between 180W and 250W depending on the model. i5-8400 will draw at least 65W. Between that and the rest of the system, the power supply may not be able to handle it at all, or won't last long if it can.

Back in 2017 when I had an RX 580, I had a barebones SeaSonic OEM PSU, 500W, and it couldn't even handle it. That CM Elite unit is definitely worse.

[A&A]

Originally posted by 尺．し工几句ヨ尺:

No, official recommendation is 500W, RX 580s can draw between 180W and 250W depending on the model. i5-8400 will draw at least 65W. Between that and the rest of the system, the power supply may not be able to handle it at all, or won't last long if it can.

Back in 2017 when I had an RX 580, I had a barebones SeaSonic OEM PSU, 500W, and it couldn't even handle it. That CM Elite unit is definitely worse.

This

If you can't buy a new power supply, you'll need to consider reducing the GPU voltage. It's nice that you can tune the RX 500 series with -0.150v offset without losing performance. Also if the GPU is RX580 2048SP (Some people really love to hide this), basicly you are buying RX570 with RX580's clock speeds.