Running Windows XP on a Pentium at 8 MHz with 20 MB of RAM

Windows XP complicated our lives a bit when it launched in October 2001, but over time it became clear that its requirements were not so extreme. Today we can find drivers almost as large as the entire XP installation disc, and its demands haven't changed much despite the Service Packs. However, there are enthusiasts out there determined to run Windows XP on systems far below the recommended baseline, and the latest record comes from Germany and Austria, with a Pentium Overdrive at 8 MHz and just 20 MB of RAM.

In a time, all I had within reach was a Pentium II at 233 MHz, 128 MB of RAM, a hard drive that begged for mercy, and a hacked-to-the-limit Windows XP installation. The only option for constant needs was to improvise and squeeze a bit more out of that nearly obsolete hardware. Windows XP made it possible thanks to its ample tweaking capacity and the possibility of operating below its minimum requirements.

The first attempts

Today, that practice is essentially a sport. What is the most basic hardware on which we can run Windows XP? The answer comes through the German portal WinHistory.de, its editor Dirk Makowski, and his personal competition with an Austrian user nicknamed Antz. The first phase of their experiments began with a Pentium 75 configured at 100 MHz, and 64 megabytes of RAM. The 64 megabytes are mandatory during XP installation, but once the process finished, there was no problem lowering memory to 32 MB.

The Socket 3 experiment

The second attempt was made on the famous Socket 3. The idea was to boot XP with a 486, but the operating system refused to cooperate. A slight change of strategy led to the Pentium Overdrive, first at 83 MHz, and then at 63 MHz. Once again, memory saw a reduction from 64 to 18 megabytes, although Windows XP reports it as 20 MB.

The Socket 4 experiment

The third experiment took them back to Socket 4 for a reason: The motherboard had a series of jumpers that made frequency changes very easy. The Pentium 60 found a new floor of 20 MHz, but certain memory limits set the minimum at 32 MB.

The definitive record

The definitive 'success' was possible thanks to a new Socket 3 motherboard (Asus PIV-486SP3) obtained by Antz, which enabled a minimum for the Pentium Overdrive of just 8 MHz and 20 MB of RAM. The PCI video card complained quite a bit at such a low frequency, but the network card (also PCI) behaved wonderfully. Now the question is: How long does the torture last? Windows XP needed half an hour to boot, while Internet Explorer took ten minutes.

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