The Intel i487 SX Math Co-Processor - Disingenuous or Just Misunderstood?

Video Description

Today I’m taking a look at a somewhat rare and misunderstood chip - Intel’s i487 SX. The i487 was marketed as a “math co-processor” to pair up with the 486 SX back in 1991. But as you’ll soon see, the i487 is not what it appears, and Intel’s somewhat disingenuous marketing led to a lot of confusion surrounding this chip. Join me today as I dig in give the i487 a try! Previous Videos on the FIC 486-VC-HD Motherboard: https://youtu.be/1M_qp5CE1DI?si=jdK3Q72Z9cuBS9G9 https://youtu.be/EuV37gbbvzs?si=8bUkMa4p1LWnRLAk CPU Galaxy’s Site and YouTube Channel: https://www.cpu-galaxy.at/Index.htm https://www.youtube.com/c/cpugalaxy If you'd like to support the channel, you can check out my Patreon page. My Patreon supporters get early access to my videos, exclusive behind the scenes content, previews and more. My Patreon Page: https://www.patreon.com/vswitchzero My Blog: https://vswitchzero.com/ Bluesky: https://bsky.app/profile/vswitchzero.com Mastodon: https://bitbang.social/@vswitchzero 00:00 Introduction 00:29 Float Point and FPU Overview 01:31 The i387 vs 486 On-Die FPU 02:24 The i487’s Misleading Marketing 03:43 The Truth about the i487 SX 04:59 The FIC 486-VC-HD 05:28 A Closer Look at the i487 SX 06:02 Pinout Differences 07:50 Installing the i487 SX 09:12 The 487’s Overdrive Successor 10:06 Power and Heat 10:32 Testing and Games 12:18 Overclocking 12:39 Conclusion