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bauto601
Senior Member
Last Activity: 01-31-2024, 07:30 AM
Joined: 09-23-2012
Location: Den Helder
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  • bauto601
    started a topic KDM 480W PSU upgrade succes! (opinions?)
    in Troubleshooting Power Supplies and Power Supply Design

    KDM 480W PSU upgrade succes! (opinions?)

    Back in 2020 i bought a (2nd hand) compact ATX psu to replace my current one. My PC case only fits very short ATX power supplies so i didn't really have the choice of buying a decent 80Plus unit. The current unit is a modded YoungYear unit that i made a thread about a while ago:
    [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-power-supplies-and-power-supply-design/66420-a-nice-youngyear-unit"]A "nice" YoungYear unit? - Badcaps[/URL]

    The "new" unit is a KDM-M6480 480W psu, the 480W number...
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    Last edited by bauto601; 12-26-2023, 03:09 PM.
  • bauto601
    replied to A "nice" YoungYear unit?
    in Troubleshooting Power Supplies and Power Supply Design
    Re: A "nice" YoungYear unit?



    If one of the primary caps was already bad a few years ago it's lasting for quite some time now despite of that. Once a cap starts to degrade it goes quite fast right? Could it be the passive PFC choke instead that's making these noises?...
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  • bauto601
    replied to A "nice" YoungYear unit?
    in Troubleshooting Power Supplies and Power Supply Design
    Re: A "nice" YoungYear unit?



    The system seems to do fine with the somewhat high 3.3v rail voltage, so it's no biggie that it's part of the group regulation and can't be modded. I really think that the Panasonic output caps and the upgraded 12V rectifier are holding it together when it's running this hot. During some BeamNG drive today, the case temp reached 50 degrees celcius at the inlet of the psu. I've got a temperature probe located around that region, it's right above the GPU cooler.

    One thing i've forgot to mention is the 50Hz hum this...
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  • bauto601
    replied to A "nice" YoungYear unit?
    in Troubleshooting Power Supplies and Power Supply Design
    Re: A "nice" YoungYear unit?

    Just a small update on this PSU project It's still chugging along nicely. The CPU has recently been replaced with a Ryzen 5500 with a small oc to 4.5GHz boost and the ram had some headroom as well, from 2666C16 all the way to 3600C16, not bad for early DDR4 memory. The current system configuration:

    - AMD Ryzen 5500 @4.5GHz Boost
    - Cooler Master ML120L RGB AIO CPU Cooler
    - 16GB DDR4 2666C16 @3600C16
    - Asrock B450M Pro4
    - 1TB SSD + 256GB SSD
    - Geforce GTX1650 Super 4GB
    - Some additional...
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  • bauto601
    replied to Aliexpress LGA2011 X79 motherboards
    in General Computer & Tech Discussion
    Re: Aliexpress LGA2011 X79 motherboards



    For the X99 boards, mod biosses are very popular since the use of a specific cpu microcode version unlocks the Xeons turbo boost to make all cores run at the single core turbo boost speed at the same tame without a time limit. With this you usually gain 500MHz all-core, which is pretty much when the all-core turbo speed normally is around 2.6GHz. So all these biosses are (luckily) publicly available. I mean, a 12 core Haswell CPU running at 3.3GHz on all cores with quad channel ecc memory support for €90 was tempting enough...
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    Last edited by bauto601; 06-03-2020, 04:05 PM.

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  • bauto601
    replied to Aliexpress LGA2011 X79 motherboards
    in General Computer & Tech Discussion
    Re: Aliexpress LGA2011 X79 motherboards

    I have ordered a micro-atx X99 board with 32GB DDR4 ECC memory and an E5-2678V3 CPU. According to the russian youtube reviewers, these boards have vastly improved over time. The early x79 were a bit twitchy but the current X99 boards seem to be a lot better.

    Oh well, i'll find out in a couple of weeks i guess.

    If you really need a somewhat good performing budget system, i would skip 775. It's just becoming too old now and you can get the boards and cpu's even cheaper on just the second hand market.

    Go...
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    Last edited by bauto601; 06-03-2020, 05:12 AM.

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  • bauto601
    replied to Old stock capacitors
    in General Capacitor Questions & Issues
    Re: Old stock capacitors

    Thanks for all the information. I will probably just use the Yageo SY caps, the SC caps will stay here in case i need a quick fix when i don't have any other capacitors laying around.

    Today i also received my DE-5000 LCR meter, an excellent piece of equipment to measure capacitor behaviour. The meter has been calibrated using the built-in calibration program and the measurements are taken at 22 degrees celcius room temperature.

    So first, let's begin with the Yageo SY series, the 1500uF 6.3V 10*19.5 01/16 caps to be precise....
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    Last edited by bauto601; 05-26-2020, 08:04 AM.

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  • bauto601
    replied to A "nice" YoungYear unit?
    in Troubleshooting Power Supplies and Power Supply Design
    Re: A "nice" YoungYear unit?



    Yup, it's still quite useful for low power pc's. But the voltage regulation is not that great from my experience and as seen in the JG review. Modding the fan speed controller for a more agressive fan curve and modifying the mag-amp circuit for the somewhat high 3.3V rail will make it as good as it will get. The system is running stable though, which in the end is all a power supply needs to do.
    The other shallow PSU i modded and posted in the gutless thread is going to replace it. (after a nice repaint) That one runs much...
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    Last edited by bauto601; 05-22-2020, 12:26 PM.

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  • bauto601
    replied to Old stock capacitors
    in General Capacitor Questions & Issues
    Re: Old stock capacitors

    Oh, i understand from what i have readen here that Teapo isn't that bad when you get the 10mm caps instead of the 8mm ones and that the later production caps have a much lower failure rate than the Teapo's from let's say 2000-2006. Especially when you don't use the extremely low-esr models that are used on motherboards. They were about €0,25 each, so i thought i could give it a go for older psu's that aren't really worth that much.
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    Last edited by bauto601; 05-22-2020, 11:14 AM.

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  • bauto601
    started a topic Old stock capacitors
    in General Capacitor Questions & Issues

    Old stock capacitors

    I recently bought a batch of capacitors at Conrad (that is, for me, a trusted source). But they have really old date codes, here is the list:

    - Yageo (Teapo) SY 1500uF 16V: 09/16
    - Yageo (Teapo) SY 1500uF 6.3V: 01/16
    - Yageo (Teapo) SY 1000uF 6.3V: 12/15
    - Yageo (Teapo) SC 2200uF 6.3V: 07/13 (7 years old )

    They were quite cheap overall so i can't complain all that much, but 7 year old caps... Are they still worth using or should i ask for a refund?
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  • bauto601
    replied to the gutless, bloated, and fried power supply hall of shame
    in Troubleshooting Power Supplies and Power Supply Design
    Re: the gutless, bloated, and fried power supply hall of shame



    I have 3 of these units and the internals are exactly the same. The 2 other units have got a different label that include an UL number that points to Sun Pro / Raidmax i believe. I have readen somewhere on this forum that a grey/metal colored fan label also is a pointer to Sun Pro/Raidmax, as is the case on all 3 units i have here. The PCB itself does not have any clear serial numbers that point towards a certain manufacturer unfortunately.

    And talking about room for modifications... The second...
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    Last edited by bauto601; 05-18-2020, 03:51 PM.

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  • bauto601
    replied to the gutless, bloated, and fried power supply hall of shame
    in Troubleshooting Power Supplies and Power Supply Design
    Re: the gutless, bloated, and fried power supply hall of shame



    I will change those caps too as soon as the electronics store here opens again, they provide genuine Pannies. (in 2 weeks time or so) Unfortunately i only had the 3 panasonic caps laying here, all the other swapped caps come from used units. Since this unit got a 2012 date code and was unused, i took the gamble that the 5vsb caps will hold up for now. The 2200uf teapo / 1000uf chengx caps didn't fit in the 5vsb spot unfortunately.




    It can be done. But to be honest,...
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    Last edited by Per Hansson; 05-21-2020, 05:09 AM. Reason: Fixed quote

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  • bauto601
    replied to the gutless, bloated, and fried power supply hall of shame
    in Troubleshooting Power Supplies and Power Supply Design
    Re: the gutless, bloated, and fried power supply hall of shame

    I recently bought 2 shallow ATX power supplies, hoping that they were better than the YoungYear unit i'm currently using. Unfortunately that wasn't the case...

    The PCB layout however did have some potential for becoming a decent compact unit. After pulling some components from some other (broken) power supplies, i did the following upgrades:

    NO PFC -> Passive PFC
    2x Y capacitor -> same
    NO X capacitor -> added X capacitor
    1x common mode choke -> 1x better wound...
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    Last edited by bauto601; 05-18-2020, 07:40 AM.

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  • bauto601
    replied to A "nice" YoungYear unit?
    in Troubleshooting Power Supplies and Power Supply Design
    Re: A "nice" YoungYear unit?

    Well, the PSU still works, didn't have any stability problems. The system has been upgraded a month ago with an additional 1TB SSD and a GTX 1650 Super.

    After this upgrade, the 3.3V rail dropped with around 0.05V, which is good in this case. After playing BeamNG for an hour (which is very heavy on the CPU and GPU) the PSU did get quite hot and the system started to turn on and off really quickly. After unplugging it and plugging it in again it works fine.

    I think that could have been the over temperature protection,...
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  • bauto601
    replied to the gutless, bloated, and fried power supply hall of shame
    in Troubleshooting Power Supplies and Power Supply Design
    Re: the gutless, bloated, and fried power supply hall of shame



    I mostly just lurk around on these forums, but this unit cought my attention. That must've been a very luxurious and expensive model for Deer. I mean, they really went out of their way for this one and did all kinds of extra work to still produce a shitty PSU.

    - Added a seperate PCB for input filtering
    - 4 "fat" diodes for input rectifier bridge
    - real output rectifiers, no "2-diodes-on-a-plate" jobby
    - The caps were good enough to last for a couple of...
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    Last edited by bauto601; 05-09-2020, 08:21 AM.

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  • bauto601
    replied to Gigabyte Aorus Xtreme Waterforce 2080 Ti - 2 pcie white leds
    in Troubleshooting Power Supplies and Power Supply Design
    Re: Gigabyte Aorus Xtreme Waterforce 2080 Ti - 2 pcie white leds



    I think this is just a typical fuckup from the marketing department that doesn't understand this kind of very complex engineering.

    Note the smaller notes inside the image that tell you that "consistent LED" means stable power. So i think that they swapped "LIGHT ON" and "LIGHT OFF" around. Since it would be more logical to turn the LED's off when there is no power. My Asus STRIX GPU's also have these LEDS that are on when the power connectors are connec...
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  • bauto601
    replied to Chaintech Apogee 7VJL Unstable
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Chaintech Apogee 7VJL Unstable



    Yup, all the KZG caps are already bulging and leaking. And i don't really trust those OST caps either. They look good but i don't think they will be in-spec anymore. These were bad times for motherboards capacitor wise....
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  • bauto601
    replied to Chaintech Apogee 7VJL Unstable
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
    Re: Chaintech Apogee 7VJL Unstable

    So i did some further research on the interwebz and i found out that this board does not have the 166fsb dividers.

    So i will change the board to a DFI NF2 Ultra B, but that one definately needs a full recap.

    It uses the following caps:
    CPU VRM output: 5x 3300uF 6.3V KZG
    CPU VRM input: 3x 1500uF 16V KZG

    And the following caps are spreaded over the board and i don't know exactly the purpose of each one:

    - 7x 470uF 16V OST RLG
    - 10x 1000uF 10V OST RLG
    -...
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  • bauto601
    started a topic Chaintech Apogee 7VJL Unstable
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

    Chaintech Apogee 7VJL Unstable

    Hello everyone,

    I'm having a problem with a rather old board, a Chaintech Apogee 7VJL.

    The pc setup is:

    - Athlon XP 3000+ (175x13)
    - 3x 512MB Corsair XMS PRO @350MHz
    - ATI Radeon X1950PRO AGP
    - Chaintech Apogee 7VJL
    - Levicom VP550 (with an acrylic top, is actually fairly decent and recapped
    on the secondary side with Panasonic caps)
    - Club3D Theatron sound card
    - USB 2.0 card with ALi chipset
    - 2x 40GB Seagate HDD's
    - 2x CD/DVD Combo drive
    - 1x Floppy drive

    Now,...
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  • bauto601
    replied to A "nice" YoungYear unit?
    in Troubleshooting Power Supplies and Power Supply Design
    Re: A "nice" YoungYear unit?



    Yeah, the PSU definately is a 250W unit at it's peak. The PFC coil (which is real, checked that) shows proudly 250W. Altough i wouldn't be that proud on such a number. It really is a scaled down model with all the cost and size cutting measures. I wanted to replace to primary caps too, but i could only find 330uF caps that had the same size. They are 105c rated and since primary caps aren't that prone to fail, i just left them sitting there....
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