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

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:
   • Repairing a Very Slow FIC 486-VC-HD M...  
   • Taking a 486 SX-25 and the FIC 486-VC...  

CPU Galaxy’s Site and YouTube Channel:
https://www.cpu-galaxy.at/Index.htm
   / cpugalaxy  

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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