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Thread: Suggestions regarding LTT's PSU Tier List

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    Default Suggestions regarding LTT's PSU Tier List

    hello everyone of the JG forum community,

    i want to do a simple request here: what would you like to see changed to the PSU tier list on the LTT forum?

    I'll be watching here as much as i can, and am willing to discuss problems. I won't be replying to comments along the lines of deletion, quitting, complaints with no ground to stand on or just general rants without usefulness, if you are planning to do so.

    there are already plans on table to separate some problematic units like the G3 from actual problematic units, but it depends how it goes internally how quick these come out

    thanks for your time

    edit: for context
    https://linustechtips.com/main/topic...-tier-list-40/
    Last edited by LukeSavenije; 11-24-2019 at 07:54 PM.

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    Actually, 'tier'ing a PSU sounds like not a good idea for me.
    And... why is G3 a problematic unit? You mean this article?

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    Quote Originally Posted by rgbodosk View Post
    Actually, 'tier'ing a PSU sounds like not a good idea for me.
    And... why is G3 a problematic unit? You mean this article?
    i know many aren't a fan of it, but it's meant to be a guideline that should be taken in consideration with (if possible, not everyone can) reviews, which i link a couple as sources since a recent revision.

    not the article on itself, but yes, the problems mentioned in it from aris's testing. the g3 was an example here though, it's not the only unit i mean

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    How are you defining tiers? What individual users need in a unit differs widely - Stephan will always rant about protection ICs and Fans, The Guru is eternally unhappy with non-LLC designs and I refuse to look at units with <40c continuous temp ratings.

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    Your list prioritizes minor factors like protections and multi rail over what really matters, like build quality. For example, the RMx and Vengeance Silver are inexplicably in the same tier, even though they couldn't be any more different in quality.

    Main problem is because of the "methodology", which encompasses too many requirements, most of which don't even matter that much. A PSU could pass all of them except one little thing, like having OPP set too high, and then they're placed in a lower tier than they should objectively be if you weren't using the "methodology".
    Last edited by hello_there_123; 11-24-2019 at 08:55 PM.

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    Quote Originally Posted by awesomegamer919 View Post
    How are you defining tiers? What individual users need in a unit differs widely - Stephan will always rant about protection ICs and Fans, The Guru is eternally unhappy with non-LLC designs and I refuse to look at units with <40c continuous temp ratings.
    mostly according to what i've written down over there

    Tier S must have OCP, OPP, SCP, OTP, UVP, OVP, inrush current limiting, well configured multirail, independent regulation, be Half-/Full bridge and meet c6/c7 crossloads. they exceed a+ requirements and stand out from the other tier units in build quality.
    Tier A+ is required to have OCP, OPP, SCP, OTP, UVP, OVP, inrush current limiting, well configured multirail, independent regulation, be Half-/Full bridge and meet c6/c7 crossloads.
    Tier A is required to have OCP, OPP, SCP, OTP, UVP, OVP, inrush current limiting, independent regulation, be ACRF/Half-/Full bridge and meet c6/c7 crossloads.
    Tier B+ is required to have OPP, SCP, OTP, UVP, OVP, inrush current limiting, independent regulation, be ACRF/Half-/Full bridge and meet c6/c7 crossloads.
    Tier B is required to have OPP, SCP, UVP, OVP, inrush current limiting, independent regulation and meet c6/c7 crossloads.
    Tier C is required to have OPP, SCP, UVP, OVP, inrush current limiting and meet c6/c7 crossloads.
    Tier D is everything that falls short of the other tier's requirements, but can only have a potential to be dangerous in certain situations.
    Tier E has heavily malfunctioning protections or far outdated and is not recommended to use with any modern system.


    so nothing really focused around fans, but only on protections and the chosen design configuration of the unit (DF/ACRF/HB/FB)
    temp ratings might be an option, but generally don't make a difference from what i've seen, as most lower rated units fall in low tiers anyways

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    Those “Tier A+ and Tier S” requirements harshly penalise low wattage PSUs that use a singular OCP trip point where 3-4 individual trip points are not particularly viable due to modern high power GPUs and CPUs.

    You also have 2 “tiers” where ACRF is considered acceptable, and yet Double forward is not, despite them facing similar issues and concerns.

    Additionally, you use a blanket “inrush current limiting” which may have differing designs (such as the addition of a bypass relay for the NTC Thermsistor)

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    I had to copy the definitions to a txt file, then add spaces to see the differences between tiers:

    Tier A+ is required to have OCP, OPP, SCP, OTP, UVP, OVP, inrush current limiting, well configured multirail, independent regulation, be Half-/Full bridge and meet c6/c7 crossloads.
    Tier A is required to have OCP, OPP, SCP, OTP, UVP, OVP, inrush current limiting, independent regulation, be ACRF/Half-/Full bridge and meet c6/c7 crossloads.
    Tier B+ is required to have OPP, SCP, OTP, UVP, OVP, inrush current limiting, independent regulation, be ACRF/Half-/Full bridge and meet c6/c7 crossloads.
    Tier B is required to have OPP, SCP, UVP, OVP, inrush current limiting, independent regulation and meet c6/c7 crossloads.
    Tier C is required to have OPP, SCP, UVP, OVP, inrush current limiting and meet c6/c7 crossloads.
    Tier D is everything that falls short of the other tier's requirements, but can only have a potential to be dangerous in certain situations.
    Tier E has heavily malfunctioning protections or far outdated and is not recommended to use with any modern system.

    It is difficult with proportional spacing, but I think you can see how irregular this all is. In your definitions, you need something that tails off on the back end, like:

    a, b, c, d, e
    a, b, c, d
    a, b, c
    a, b, etc.

    Edit: ...and the BBS swallows up all of the spaces I put in. Jonny, this is very frustrating.
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    Wrap it in CODE tags

    Code:
    Tier A+ is required to have OCP, OPP, SCP, OTP, UVP, OVP, inrush current limiting, well configured multirail, independent regulation, be Half-/Full bridge and meet c6/c7 crossloads.
    Tier A is required to have OCP, OPP, SCP, OTP, UVP, OVP, inrush current limiting, independent regulation, be ACRF/Half-/Full bridge and meet c6/c7 crossloads.
    Tier B+ is required to have OPP, SCP, OTP, UVP, OVP, inrush current limiting, independent regulation, be ACRF/Half-/Full bridge and meet c6/c7 crossloads.
    Tier B is required to have OPP, SCP, UVP, OVP, inrush current limiting, independent regulation and meet c6/c7 crossloads.
    Tier C is required to have OPP, SCP, UVP, OVP, inrush current limiting and meet c6/c7 crossloads.
    Tier D is everything that falls short of the other tier's requirements, but can only have a potential to be dangerous in certain situations.
    Tier E has heavily malfunctioning protections or far outdated and is not recommended to use with any modern system
    or a table (use the "table properties" to show a visible border, 8 rows, 14 columns

    A+ OCP OPP SCP OTP UVP OVP inrush current limiting well configured multirail independent regulation be Half-/Full bridge meet c6/c7 crossloads

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    Quote Originally Posted by awesomegamer919 View Post
    Those “Tier A+ and Tier S” requirements harshly penalise low wattage PSUs that use a singular OCP trip point where 3-4 individual trip points are not particularly viable due to modern high power GPUs and CPUs.

    You also have 2 “tiers” where ACRF is considered acceptable, and yet Double forward is not, despite them facing similar issues and concerns.

    Additionally, you use a blanket “inrush current limiting” which may have differing designs (such as the addition of a bypass relay for the NTC Thermsistor)
    Quote Originally Posted by Jon Gerow View Post
    Agreed. Active clamp IS double forward. They just "clamp off" the peaks of the wave form.
    i could make a change to that, limiting it only to one tier, but i'll first talk internally about that part

    if i were to separate the lower wattage single rail units, the list would honestly get way too messy

    any suggestion regarding the inrush then?

    Quote Originally Posted by GDILord View Post
    or a table (use the "table properties" to show a visible border, 8 rows, 14 columns
    if you look at the methodology on the page, there are two spoilers already containing a table of it

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