Today I’m taking a look at a somewhat rare and misunderstood chip Intel’s i487 SX. The i487 was marketed as a “math coprocessor” 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 486VCHD Motherboard:
   • Repairing a Very Slow FIC 486VCHD M...  
   • Taking a 486 SX25 and the FIC 486VC...  

CPU Galaxy’s Site and YouTube Channel:
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00:00 Introduction
00:29 Float Point and FPU Overview
01:31 The i387 vs 486 OnDie FPU
02:24 The i487’s Misleading Marketing
03:43 The Truth about the i487 SX
04:59 The FIC 486VCHD
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