Uploaded December 2024 | Updated September 2026, 1 week ago
I recently repaired and overclocked a $49 "for parts" Intel Pentium Overdrive 63MHz processor from eBay, the place where I buy the things I later regret™. And I seem to have tamed the Shuttle HOTMESS-419... er, the Shuttle HOT-419 motherboard (though it still has its quirks and features). Paired with a Trident TGUI9440 VESA Local Bus video card, it's a formidable DOOM-playing vintage computer.
But what good is a build without a case? None. And when am I going to finish the sleeper 486 system? Tonight!
I guess it technically isn't a sleeper 486 any longer, but a real Pentium system would run circles around it. And for anyone concerned about the providence of the system, while it isn't the same 486 motherboard that was in it from the VCF East Consignment, it is a similarly-capable motherboard... just one that actually supports Write Back Cache. Even if its memory support is a bit of a headache.
Will I find all the case parts after being disassembled for over a year? Will the power supply be adequate for the system? Will I find a working optical drive? You'll have to watch to find out!
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I recently repaired and overclocked a $49 "for parts" Intel Pentium Overdrive 63MHz processor from eBay, the place where I buy the things I later regret™. And I seem to have tamed the Shuttle HOTMESS-419... er, the Shuttle HOT-419 motherboard (though it still has its quirks and features). Paired with a Trident TGUI9440 VESA Local Bus video card, it's a formidable DOOM-playing vintage computer.
But what good is a build without a case? None. And when am I going to finish the sleeper 486 system? Tonight!
I guess it technically isn't a sleeper 486 any longer, but a real Pentium system would run circles around it. And for anyone concerned about the providence of the system, while it isn't the same 486 motherboard that was in it from the VCF East Consignment, it is a similarly-capable motherboard... just one that actually supports Write Back Cache. Even if its memory support is a bit of a headache.
Will I find all the case parts after being disassembled for over a year? Will the power supply be adequate for the system? Will I find a working optical drive? You'll have to watch to find out!
*
Ways to Support the Channel:
☕️ Tips or Support via Ko-fi: ko-fi.com/jdmcs
🈷️ Support me on Patreon: patreon.com/jdmcs
📦 Amazon Wishlist: jdmcs.net/wishlist
... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: jdmcs.net/myblog
Follow me on Instagram: jdmcs.net/myinstagram
Follow me on Twitter: jdmcs.net/mytwitter

![Macintosh SE/30: Blast from the Past [WordPerfect] Processing? (Computerized Start™ Live)
I found an SE/30 on eBay (the place where I buy the things I later regret™) that looked like a good candidate: it was auction format, the auction end time was during the day, and most importantly, there was no rust visible on the I/O ports. $208 total later (gotta pay shipping and tax), and this SE/30 has landed in the basement.
Last time we looked at this SE/30, we completed the recap and cleaned the floppy drive. Tonight, were going to test everything. And if it works, well launch the original install of WordPerfect to see how perfectly it can make my words...
Will it chime after the recap? Will the floppy drive work? Will WordPerfect for the Mac be a treat to use? Youll have to watch to find out!
*
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![My UMC U5SX 486-33F: Does Windows 98SE Detect It as a Pentium MMX? (Computerized Start™ Live)
Youve probably heard of Intel and AMD processors, as both manufacturers are still in business today. If youve been into computing long enough, youve probably also heard of Cyrix. All three companies made 486 processors for Socket 1-3 systems.
But did you know that UMC also made 486 processors? No? That partly might be because Intel sued patent infringement, and as a result of the settlement of the case, UMC had to withdraw their processors from the US market. That might also be because they only made 486SX-era processors, not leaving a huge window for sales in other markets; Wikipedia mentions that they did have a clock-doubled version in production, but only engineering samples existed.
Speaking of Wikipedia, someone has added a claim with no footnote or citation:
Due to an error in the microcode, Microsoft Windows 98 Second Edition identifies some processors as an Intel Pentium MMX which could cause the operating system and software running within it to crash or exhibit undefined behavior.
(https://en.wikipedia.org/wiki/UMC_Green_CPU, accessed December 30, 2025)
To which I have to say, [citation needed].
Since I now have a UMC Green CPU, specifically the UMC U5SX 486-33F, I can actually try to put this to the test... or all the Windows installs will put me to the test! We got Windows 95 and Windows 98 First Edition, then had trouble getting Windows 98 Second Edition installed.
Tonight, Im going to try to get Windows 98SE installed, but by doing a fresh install instead of an update.
Will Windows 98SE detect my UMC 486 as a Pentium MMX? Or will I have trouble installing Windows 98SE on this unsupported system configuration? Youll have to watch to find out!
*
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... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
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Follow me on Twitter: https://jdmcs.net/mytwitter My UMC U5SX 486-33F: Does Windows 98SE Detect It as a Pentium MMX? (Computerized Start™ Live)](https://i.ytimg.com/vi/SsPsjlIT-Q4/mqdefault.jpg)






