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Thread: Help me choosing a good PSU

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    Default Help me choosing a good PSU

    Hi All, I just upgraded my PC except for the PSU. I have an old Thermaltake Smart M650W and i'm thinking about getting a new PSU.

    My budget is around 90€, i found this good PSUs on amazon (im from italy), ordered by price:
    - Cougar GX-S 550W (65€)
    - BeQuiet! Pure Power 10 500W (70€)
    - Corsair TX550M (74€)
    - BitFenix Formula Gold 650W (75€)
    - Seasonic Focus Plus Gold 550W (84€)
    - BitFenix Whisper M 650W (90€)

    Which PSU should i buy? i've read lot of different thing about those PSUs, for example, in this PSU tier list the only one in tier 1 is the Whisper M, but in lot of reviews the Seasonic is rated higher that the whisper.

    This is my actual configuration:
    AMD - Ryzen 5 2600X
    ASRock - X470 Master SLI
    G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3200
    MSI - GeForce GTX 1070 Ti
    Fractal Design - Meshify C TG ATX Mid Tower Case
    WD Black nvme ssd
    3TB HDD
    6 * 120mm fans
    something like 100 leds

    Thanks for any help!

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    Can you not find the Whisper 550M? The 650M has a much higher idle fan RPM...

    Regardless, the best unit there is probably the Whisper, perhaps the Pure Power 10 if you want to save money. 450w would be plenty for your build, so a Whisper 450M would be perfect for that system.
    Just some nerd from 'Straya

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    The whisper 550 is just 3€ less then the 650, while the 450 is 77€.

    Is 450W really enough? almost any PSU calculator give me around 460W usage on that configuration (without OC)

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    Quote Originally Posted by catta202000 View Post
    Is 450W really enough? almost any PSU calculator give me around 460W usage on that configuration (without OC)
    Then don't use a PSU calculator. Max you gonna pull out of the PSU is 325W without overclocking.

    So without overclocking, or just a normal overclock a good 450W is enough.
    https://www.amazon.it/BitFenix-bp-fm...dp/B0775QFP8F/
    https://www.amazon.it/BitFenix-BP-WG...dp/B01MQOGHK4/

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    Which suggests the power supply calculators are conservative by a factor of 2, which leaves one running the supply at half full load; probably a good spot to be at.

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    Quote Originally Posted by ashiekh View Post
    Which suggests the power supply calculators are conservative by a factor of 2, which leaves one running the supply at half full load; probably a good spot to be at.
    If you were running your computer at 100% load 24/7/365

    sure

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    I just run a "Power supply stress test", i haev no idea what this test is doing, but peak consumption with my actual PSU is 355W

    Why Bitfenix over Seasonic? In linustechtips psu tier list the whisper is tier 1 while fosuc plus gold is tier 2. But in jonnyguru review the whisper is rated 8.9 while the seasonic is rater 9.8 ("this is perhaps the best performing 550W unit I've seen thus far")

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    Quote Originally Posted by catta202000 View Post
    I just run a "Power supply stress test", i haev no idea what this test is doing, but peak consumption with my actual PSU is 355W
    If the supply is 80% efficient then the computer is consuming 285W


    Quote Originally Posted by ridgid13579 View Post
    If you were running your computer at 100% load 24/7/365
    I run mine maybe 8 hours a day and in the Summer heat, so I'd say a generous derating was justified even there.

    My point was that if the calculators already put the safety factor of 2 in, one probably doesn't want to add a second factor of 2.

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    Quote Originally Posted by ashiekh View Post
    If the supply is 80% efficient then the computer is consuming 285W
    My actual PSU is 80 bronze certified i think

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    Quote Originally Posted by catta202000 View Post
    My actual PSU is 80 bronze certified i think
    In that case the PC takes around 300W out of the PSU. But as I already said the max will be around 325W. So a 450W is perfect if you don't overclock or only gonna do a small overclock.

    Why Bitfenix over Seasonic? In linustechtips psu tier list the whisper is tier 1 while fosuc plus gold is tier 2.
    That list is BS.
    But in jonnyguru review the whisper is rated 8.9 while the seasonic is rater 9.8 ("this is perhaps the best performing 550W unit I've seen thus far")
    Higher score doesn't mean that the PSU is better. It could be the case, but doesn't have to be the case. Also having perfect voltage regulation with a static load from a load tester is totally useless in real life, so it's not important in real life.
    Last edited by -The_Mask-; 07-16-2018 at 06:28 PM.

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