PC with quick, easy speed changing \ VOGONS

PC with quick, easy speed changing

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First post, by brad1982_5

Posted on 2015-01-31, 19:21

brad1982_5 Offline

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Done a little project today where I'm able to change the speed of the computer without having to take the cover off to change jumpers. I have replaced the jumpers with switches instead.

A diragram of how to set the speed

And the insides

Some old games run too quick set at 200 MHz and the MIDI music sounds bad so being able to slow the PC down solves the problem. Then for more modern games the PC can then be set to run at full speed.
And yes I did try slowdown software and MIDI problems still occur at high speeds.
However I like this setup it's quite unique.

System specs

Intel Pentium 200 MHz (non MMX)
64MB EDO RAM (4x 16MB modules
Quiet 20GB 5400RPM with disk overlay software
PCI Voodoo 3 3000
Sound Blaster 16 with YAMAHA DB50XG daughterboard
Realtek 8139 100MBP/s LAN
Unknown motherboard, Intel 430VX chipset I think
256KB Cache module
Hitachi 40x CD/DVD-ROM Drive

Reply 1 of 5, by PhilsComputerLab

Posted on 2015-01-31, 19:29

PhilsComputerLab Offline

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Nice!

I did something similar with an AMD 486DX-4 machine when I was a teenager. I put switches at the front though. Allowed me set it from DX2-50 all the way to DX4-120 😀

YouTube, Facebook, Website

Reply 2 of 5, by brad1982_5

Posted on 2015-01-31, 19:43

brad1982_5 Offline

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That's impressive! 😀 486's normally have turbo switches as well. Yeah I decided to have the switches at he back I didn't want to modify any of the front, I like it to keep it's original factory look and it can be changed back if I ever need too 😀

Reply 3 of 5, by brad1982_5

Posted on 2015-02-01, 18:18

brad1982_5 Offline

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Update, added a fan to the Voodoo 3 in the same way as shown on philscomputerlab's youtube channel.

Had to move the ethernet card over a slot as it was lightly rubbing with the fan.

Results. MUCH COOLER! 😀

Reply 4 of 5, by Half-Saint

Posted on 2015-02-01, 20:19

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Location: Slovenia

That motherboard looks like PC Chips but I'm not sure about the model number.

Your cooling solution reminds me of something I did almost three years ago:
https://www.flickr.com/photos/mr_mayhem/6936227935/

The motherboard only has a passive heatsink which turned out to be insufficient for watching HD video - I was getting frequent crashes and very high temps.

Finally I settled for a 100x100x12 Scythe Kaze-Jyu fan, 1000 rpm. Thin and a perfect fit, attached via four cable ties directly to the heat pipes.