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Seasonic x400...case airflow required?

post #1 of 22
Thread Starter 
I'm just wondering if the x400 would be safe in the case below. Not if it's ideal, because it obviously isn't - but if it'll just be safe.

Measured at the wall, the PC draws 70W idle and 250W load on an Earthwatts 430W. That's about 56W-200W internally. But it may increase if I upgrade the GPU in the future (currently a 9800GT).


Edited by Manyak - 1/23/11 at 4:11am
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post #2 of 22
I assume this is for an HTPC, and the PSU mentioned is the Passive version? I don't see why it would have a problem, 200W won't push it very hard. It's possible, just make sure the exposed grill is facing the cases grill.
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post #3 of 22
it needs minimal airflow,but i'd get the 560 version for near the same price the fan hardly starts moving until you hit 400ish load
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post #4 of 22
Thread Starter 
Quote:
Originally Posted by jellis142 View Post
I assume this is for an HTPC, and the PSU mentioned is the Passive version? I don't see why it would have a problem, 200W won't push it very hard. It's possible, just make sure the exposed grill is facing the cases grill.
Correct on both counts!

And yeah, I'm not trying to suffocate it

Quote:
Originally Posted by obsidian86 View Post
it needs minimal airflow,but i'd get the 560 version for near the same price the fan hardly starts moving until you hit 400ish load
I thought about it, but 560 just seems too overkill. At idle it'll only be at 10% of the rated draw (or even a bit less), which puts unneeded stress on the components.

But if you've got a better idea for a ~400W unit I'm all ears . I'm definitely not opposed to swapping out the fan if that's what it takes to get it quiet.
Edited by Manyak - 1/23/11 at 4:27am
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post #5 of 22
It would be dorky, but if I was in this situation, I would consider getting a quiet, all black fan and ghetto-rigging it to the vent on the side of the case. If that's not your style, I'll understand I still don't think it would have a problem running without direct airflow.
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post #6 of 22
Thread Starter 
Quote:
Originally Posted by jellis142 View Post
It would be dorky, but if I was in this situation, I would consider getting a quiet, all black fan and ghetto-rigging it to the vent on the side of the case. If that's not your style, I'll understand I still don't think it would have a problem running without direct airflow.
Not that I'm opposed to it (although I'd pop open the PSU and install it internally instead), but why would I buy a fanless PSU if I'm just going to add a fan myself anyway? lol
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post #7 of 22
Umm...I have no idea. Why does Zalman add internal heatsinks to their PSU's? Both are pointless I guess There's a small grill on the same side as the modular connectors, if there's any positive pressure, there would be a little bit of airflow.

I give up. They designed it to be ran fanless. You'll be lucky to pull half it's rated wattage at all times, and it will be exposed to air. It'll be fine
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post #8 of 22
Thread Starter 
lol alright, I guess it's worth a shot. Worst case, if I end up upgrading the GPU to something with a higher draw, I'll install a fan myself.
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post #9 of 22
Quote:
Originally Posted by Manyak View Post
I thought about it, but 560 just seems too overkill. At idle it'll only be at 10% of the rated draw (or even a bit less), which puts unneeded stress on the components.
How's being at a low load going to put unneeded stress on the components of the PSU?
Lower the load, lower the stress.

You could get an SS300-ET from Seasonic.

Though if your load is that low, why not get a PicoPSU?
PicoPSU-120-WI-25 + Antec Brick

You can read a review here

The FSP brick Jonny used is the same as the Antec Brick.
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post #10 of 22
Thread Starter 
Quote:
Originally Posted by Tator Tot View Post
How's being at a low load going to put unneeded stress on the components of the PSU?
Lower the load, lower the stress.
Lower efficiency = more heat = faster aging

Of course...I don't know why I didn't think about this last time...but fanned vs fanless kind of reverses this...
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