PSU BeQuiet or Fanless and if so what wattage for SLI

Max Silva

Max Silva

Max Silva

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Hey Guys,

About to start a new build just bought the BeQuiet Dark Base Pro 900 case, buying a part every month as obviously its quite expensive to build a decent 4k rig these days.

So here it goes I've been doing a bit of research into how to start so I want to start with the PSU as my next item. I can see that the BeQuiet obviously do the quietest PSU's with Fans but there is the also the Fanless Seasonic's?

Now to begin with my Rig will have one Graphics card the GTX 1080ti before I can save enough for another 1080ti. Will a fan less PSU even power a single 1080ti let alone in SLI? Then the next question would be what PSU, I've done a bit of research and can only see seasonic's ?

If I have to go fanless will a BeQuiet 650w have enough power for a GTX1080ti in SLI ? Or do I need more power.
 
If you're going to use non-reference factory overclocked 1080 Tis that's basically upward 300W per card without knowing how much "up to eleven" that model is cranked.
Then what CPU needs and some 50W for other parts before counting in reserve for PSU.
Wouldn't look any below 750W PSU for two non-reference cards, and for more heavily OC'd cards 850W would be good.

Now if it were non-Ti 1080s that would be different thing, GP104 is lot less power hungry than GP102.
Also reference cards have more moderate power requirements.
 
Not a fan of BeQuiet PSU myself, they aren't the quietest despite the name, and they tend to cost more than similar or better PSUs. :)

I pretty much agree with EsaT's power usage, so no point in repeating that.

So really you are looking a hybrid PSU that will be fanless up to a certain level of usage.

The Seasonic Prime PSU are highly recommended hybrid units rated 850 W and over are worth a look.

If you want to be pretty much totally silent up to around 800 W usage and you have money to burn, you could get a 1600 W EVGA Supernova P2 or T2 / 1600 W Super Flower Leadex Platinum or Titanium PSUs.
But make sure you can fit them in your case, they are massive. :p
 
Investing money into power supply that is dead silent/as quiet as possible at 800W or so isn't really a good investment as at that point the rest of the components will be making so much noise dissipating the 800W of heat that the 80-110W being dissipated by the power supply fan won't require the fan to be nearly as loud.

Max Silva said:
buying a part every month
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This is a terrible idea. Whilst your parts sit in their boxes unused, they are losing value, becoming outdated and reducing the remaining warranty length. Also if something is unwanted you won't be able to return it for a refund. It's much better to just put the money away each month and buy when you have enough money to afford the entire build that you want.
 
Disco_P said:
Investing money into power supply that is dead silent/as quiet as possible at 800W or so isn't really a good investment as at that point the rest of the components will be making so much noise dissipating the 800W of heat that the 80-110W being dissipated by the power supply fan won't require the fan to be nearly as loud.
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Virtually all the heat will be going out the back of the PSU via the grill, path of least resistance. So that is a non issue. (And before any one pips in, anyone that installs the PSU with the fan face up shouldn't be building PCs)

Not that I recommend the 1600 W PSU option, it's a massive OTT option. But an option all the same. :)
 
[QUOTE="Sasahara, post: 31304724, member: 7819] (And before any one pips in, anyone that installs the PSU with the fan face up shouldn't be building PCs) [/QUOTE]

This has been debated and disproved ages ago. PSU orientation is dependent on the components of the system.

Just use a very simple example, fanless PSU and think what would happen if you mount it fan facing down and you would realize how wrong your generalization was.
 
Sasahara said:
Virtually all the heat will be going out the back of the PSU via the grill, path of least resistance. So that is a non issue. (And before any one pips in, anyone that installs the PSU with the fan face up shouldn't be building PCs)
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Fancy thing what Seasonic Prime's quick installation guide says.
For PRIME Fanless: The power supply unit must be mounted into the computer case with the ventilation top cover facing UPWARD
Actually same is recommended also for semi-passively cooled PSU in hybrid mode.
 
EsaT said:
Fancy thing what Seasonic Prime's quick installation guide says.
For PRIME Fanless: The power supply unit must be mounted into the computer case with the ventilation top cover facing UPWARD
Actually same is recommended also for semi-passively cooled PSU in hybrid mode.
Click to expand...

Well according to him, the engineers who designed the PSU apparently did not understand the law of thermodynamics theorized by himself lol.
 
Regarding fan-less Seasonic PSU's you don't need them.

Even the older X Gold series you won't hear the fan, and when your GPU is at 100% the GPU fan(s) will make far more noise then the Seasonic fans.
 
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Max Silva>I don;t know what cpu you using to drive the sli 1080 ti's. But I have 8700k and 1080ti the most I think I have ever seen it is 400w according to one of those cheapy watt meters. The 8700k was overclocked the 1080 ti just left at stock.

I also have have 5930k and sli 1080 ti amp extremes and that draws 940w at peak load. Again that is using one of those cheap watt meters I am not sure how accurate they are.
 
I have an evga 1000w T2 and semi fanless mode is on. I've yet to hear it. I also own the bequiet dark pro 900. Acoustics and design are second to none.
 
I have a fractal define Newton r3
With the fan facing down it will not run passive the fan spins up and down non stop
With the fan facing up it spins up once in a blue moon
And that fan is loud compared to a seasonic psu
I can hear it
 
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