What is the best 450W power supply?

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dannyzfreedman

Mar 10, 2018
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I think that 550W will be too much for me even if I upgrade. Plus, right now I only need about 250W, so with an upgrade 450 would be perfect. Advice?
 
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The be Quiet Straight Power 11 I believe is the best, followed by the Bitfenix Whisper > then the Bitfenix Forumula though it isn't modular > cougar GX-S, Seasonic Focus.

The Focus isn't as good as competitors. The 450w version is based off a different platform as the other variants.
 
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I agree with the second half of you comment. I use a be!quiet psu myself. I never had any problem with it.

The first part I do disagree.

You can prove anything and its contrary simply based on a quick internet search. One can always find biased reviews and videos. I know there are bigot fan boys as well. However, there are independent testers and a community of users spreading useful info too.

I read hundreds of comments here at this forum stating Seasonic is reliable. I´d like to believe that they spoke the truth or at least got their pay checks. Sign me up, I also recommend their power supply modules :)
 
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there a sites like johny guru hat load tests power supply to the point of failure. they do find the weak ones. to the op be care full of the wattage your buying. if you buy a low wattage unit now and then try and drop in a gaming gpu you may have to replace the power supply if it shuts down under gaming load. most gaming pc you want to over size the power supply a little bit. and buy a unit that have the wattage if you drop in a higher end gpu latter on. I would spend a little more for a good 650w unit. the 650w run a 1060/1070 or amd gpu fine without running hot or lound.
 
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http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=529
 
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and buy a unit that have the wattage if you drop in a higher end gpu latter on. I would spend a little more for a good 650w unit. the 650w run a 1060/1070 or amd gpu fine without running hot or lound.
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Not really, 450w is easily capable of mid range GPUs like the GTX 1060 and even GTX 1070. For higher end GPUs and CPUs, 550w will be more than capable.

Real power consumption is lower than you believe. Most systems use in the range of 200 - 300w at load.

And how would a higher watt PSU draw less heat or less noise? It will still have the same efficiency, same design, same heatsinc and fan (if we're talking about the same series), so it will produce the same heat or noise. Unless the fan curve is different, but often times PSUs are louder at higher power ratings.

Otherwise it's defying the laws of thermodynamics.
 
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first off i think you have wattage a power supply outputs and how well it uses power mixed up. when i talk about power supplys and wattage (output) im talking about the amp load that the unit can run at before if fails. in real life most pc power supplys run best at 50-60 percent of there max rated load. what you dont want to do on a gaming rig is load the 12v rail close to it max output. this cause a lot of heat and fan noise from the power supply. how good the caps and other parts and the design of the power supply comes into play to at max load. look on jonny guru page and there load test data. look at all the low end and no named units that failed under load less then there rated output. also look at the units that pass at there 80/100/110 percent test. look at the ripple those unit have. going to a larger power supply gives you higher load on 12v rail. if your taking about two supplys from the same vendor like the cx line. how much power any power supply uses depends on the load size. if both units have a 300w load then both are going to be the same efficient. when your on the boards for a long time you see a lot of people posting for help for gaming rigs that lock up or shut down in games. you get to see that the power supplys were eather cheap or under sized. that the fix a lot of the time was buying a good name brand unit and one that had the output to keep the atx spec when under a good load. real bad or cheap units will just make a big bang and stop. the others can cause bsod/lock up..other issues if the power not stable.
 
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im talking about the amp load that the unit can run at before if fails. in real life most pc power supplys run best at 50-60 percent
Click to expand...

That is completely wrong. Any good power supply can run at 100% without failing because that’s what it’s rated for. The best scenario for a PSU would be at 60w because it draws less heat. But what is the use for that as a consumer?

12v rail close to it max output. this cause a lot of heat and fan noise from the power supply
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It isn’t about relative load, you need to look at the real load if a 450 PSU draws 50w of heat at 450w load, a 850w PSU with the same internals in a 450w load will still draw 50w of heat.
If it’s the same heat drawn, why would the fan be quieter at a higher watt PSU? Most of the time it’s the opposite, because the PSU needs to cool down higher loads.

look at all the low end and no named units
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OP shouldn’t be buying a low end PSU.

you get to see that the power supplys were eather cheap or under sized
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That’s hardly every from an undersized PSU, unless they were using an OEM one. A good 450w power supply can handle 300w, easily. And a good power supply will have good electrical performance at high loads, that’s why we call them good.

It’s not the wattage that causes problems, it’s the quality. At the same price you could get a low end 650w PSU, and a high quality 450w PSU. With OPs current build the first option will cause issues.
 
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