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  1. Thread: How Cold

    by Jon Gerow
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    Typical operating range for a consumer PSU starts...

    Typical operating range for a consumer PSU starts at 0C.

    We don't tend to test below 0C.
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    No freaking way the SF750 is discontinued. We...

    No freaking way the SF750 is discontinued. We can't make enough of them!
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    An RM850i should have ZERO issues with a 6900XT. ...

    An RM850i should have ZERO issues with a 6900XT. The problem is something else.
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    I believe Arena Electronic GmbH is just the...

    I believe Arena Electronic GmbH is just the German distributor. Just as "Chieftec USA", aka Systemax, was the U.S. distributor back in the day.

    From their website:

    "Since 1994, the ARENA...
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    They're probably looking at the higher efficiency...

    They're probably looking at the higher efficiency of the AX over HX (Titanium vs. Platinum) and therefore assuming that this means the PSU is better overall.
  6. Yes. A Goal Zero Yeti.

    Yes.

    A Goal Zero Yeti.
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    Nope.

    Nope.
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    I'm not much help. I use Google Drive and...

    I'm not much help. I use Google Drive and Microsoft One Drive which back up in real time. I then copy over to an external SSD on a weekly basis.
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    Frame rate is limited to 30 FPS because the human...

    Frame rate is limited to 30 FPS because the human eye only sees 15 FPS.

    Well. Cyberpunk is a bit more demanding. I wouldn't use less than a GTX 1060.
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    At 1080p over 60fps?

    At 1080p over 60fps?
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    Keep in mind how (relatively) small the...

    Keep in mind how (relatively) small the transformer is. Your Curie point is going to be lower when there's less surface area, soo... it's pretty low.
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    Point? This is neither a heat pump, nor does...

    Point?

    This is neither a heat pump, nor does it use GaN.

    Your standard SMPS PSU transformer saturates at temps over 110C. That's the primary reason you see cheaper units rated at 40C or some...
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    I worry about the heat. Operating at 50C, an...

    I worry about the heat. Operating at 50C, an 850W Gold PSU's SR can easily hit 100C, and the transformer can get near 110C. Other than the bridge diode and primary switching FETs, these are the...
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    Those modular connectors! YIKES! Well.. I...

    Those modular connectors! YIKES!

    Well.. I guess people won't be plugging the wrong cables in anymore. :o
  15. 120 x 15: ...

    120 x 15: https://www.dropbox.com/s/vpu3ux2359hkkp4/HA1215M12F-Z%2021010702%202000RPM.PDF?dl=0

    120 x 25: https://www.dropbox.com/s/r53btjynfb0kl27/HA1225M12F-Z%2021010703%202000RPM.pdf?dl=0
    ...
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    True, but you're also talking about DC to DC buck...

    True, but you're also talking about DC to DC buck converters at a much lower voltage and a smaller power range.
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    Yes. See the website: ...

    Yes. See the website: https://www.chieftronic.com/
  18. YIKES! What's the advertised capacity of that...

    YIKES! What's the advertised capacity of that extension and how many things were plugged into it?!?!

    Remember, resistance = heat!

    But the RM550x should be more than enough.
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    Do you have the spec sheets for the caps? ...

    Do you have the spec sheets for the caps? There's more to a capacitor than capacitance and voltage.
  20. Right CX is LLC. CX-M is DF. Still probably the...

    Right CX is LLC. CX-M is DF. Still probably the better unit.

    And you're right about that FSP. Should be a heck of a lot cheaper than is listed.
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    Fantastic paper: On Size and Magnetics

    I'm often frustrated by armchair engineers that seem to think the entire industry is wrong and that they're right because they have a basic fundamental understanding of switch mode power supplies (as...
  22. Long life sleeve is the same as rifle bearing. ...

    Long life sleeve is the same as rifle bearing.

    I've asked for spec sheets for the other fans you asked about as those are normal, off the shelf fans that they should have data sheets readily...
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    Oh wow... Chieftec is one of the oldest brands...

    Oh wow... Chieftec is one of the oldest brands out there. 30 years. They're the ones responsible for the infamous "Dragon" case, rebranded by Ultra and Antec. Forever, their decent stuff was made...
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    Only 1% of customers wrote a review and it still...

    Only 1% of customers wrote a review and it still manages to average three stars??? That's pretty good.
  25. Absolutely. 9 out of 10 times, when you have...

    Absolutely. 9 out of 10 times, when you have "capacitor singing", it's because there's an inconsistent waveform coming from the mains.
    ...
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