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ThunderDream Power Supply for Sega Dreamcast

CA$137.68
(7 reviews) Write a Review
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SKU:
SAGTNDRDREAM[HHH-5C]
ThunderDream Power Supply for Sega Dreamcast

ThunderDream - Dreamcast Power Supply

This is the best plug-and-play, universal, professionally made internal Dreamcast power supply.

Features:

  • Universal input, so it can tolerate any input voltage automatically.
  • Professionally designed, no datasheet copy-paste circuits. Using premium quality parts and best engineering design approaches. This wasn’t built for budget but rather perfection.
  • Very low noise, less than 30mV p-p at full load inside console (not an outside resistive load).
  • Low heat generation, way much better thermals than all other solutions.
  • Plug-and-play, so no soldering, cutting, or anything.
  • Medically rated, extremely safe power module used which guarantees utmost safety and performance.
  • High power, rated for 30 watts which is 8 watts more than original PSU which is more than enough for any upgrades  you can think of.

Less than 20-30mV p-p at full load inside console not pure resistor load. This is very critical as mere resistive dummy load does not represent the ripple and noise capabilities of any power supply but rather the end application itself. The Dreamcast sips power at 50-60 hz intervals which inflects this behavior in power circuit itself. This can cause noise, ripple, or instabilities in cheap power supplies but not this one.

 

This is a Rev 2 of the design, which has these changes:

  • using readily available components, so that it can be made at any time without lead time.
  • the use of high quality polymer capacitors instead of regular electrolytic capacitors.
  • Having a genuine Panasonic polymer capacitor at main output along with ceramics, all low ESR to deliver optimum performance.
  • the main input connector is having a metal stripe now which is exactly like the original PSU which is more robust connector.
  • it is now 4 layer board which helps in more noise attenuation.
  • the color is matte black which is more beautiful than regular black.
  • there are some minor changes too.

Visit the creator's discord: https://discord.gg/tfyHBXGS or website  for support and more information.  

 

Please Note: When plugging in the power switch, it does not matter which direction you plug it in.  It is not keyed one way or another, you can plug it in the way the wire naturally seems to fit but if it is reversed it will still work just fine.  

Videos

7 Reviews

  • 5
    High Quality Product

    Posted by Reviewer on Nov 19th 2025

    Easy installation, with a perfect fit into the Dreamcast`s case. Power supply stays cool while using ODE. High quality board and components.

  • 5
    ThunderDream Power Supply for Sega Dreamcast

    Posted by Daniel on Aug 21st 2025

    Stunning piece of kit. The build quality is substantial and quality of components second to none. The `end boss` of Dreamcast PSU. Strong and stable for all mods to be on at once. Also works in any location without hassle. 10/10

  • 5
    ThunderDream Power Supply

    Posted by M. Yocum on Aug 1st 2025

    This is a pretty solid PSU. I had issue with the original PSU creating to much heat to due a the GDEMU upgrade installed and I didn`t want a external brick that comes with some of the after market solutions. Being able to use a universal two prong cord is really nice. This runs pretty cool and I have a HDMI upgrade that tends to run hot so if you`re looking for a sleek solution that can help with heat management this is worth the money. Only note is I had to remove the original plastic foot that props up the old PSU to sit this new one in flush so don`t force anything and if you are something is wrong.

  • 5
    thunderdream psu

    Posted by Xander271 on Jun 20th 2025

    No power supply required, low pulsation, almost cold. Excellent quality. I recommend.

  • 5
    Amazing Power Supply

    Posted by Dork on May 31st 2025

    My Dreamcast has a USB GDROM with a Noctua fan. I previously had a Dream PSU but even with the recommended power supply there was noticeable heat as well as video interference. The Thunderdream runs extremely cool as well as no interference. Highly recommended

  • 5
    High quality construction

    Posted by Luiz Barone on Sep 28th 2024

    I couldn`t be more satisfied, it really delivers on what it promises, this is a very welcome update for those who want to make their Dreamcast with updated components with excellent performance and zero heat emitted, which helps greatly in cooling the console.

  • 5
    Excellent design and thermals.

    Posted by Richard H on Sep 3rd 2024

    I was looking for a way to reduce the thermals of my dreamcast and this power supply has been nothing short of rock solid.