This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
When a GS equipped with an accelerator experiences frequent crashes into the monitor after a speed upgrade, the usual explanations are ... 1. the accelerator is over-clocked for the microprocessor or RAM; 2. there are serious noise spikes on the Slot power lines. If you are 'pushing' your current RAM or using an old 65C816, you can upgrade to faster chips or swap in a slower oscillator. Often, the problem will be noise spikes related to increased current load and/or increased sensitivity to noise related to faster clocking. See the POWER FAQs for Power Supply and motherboard mods which should help. ----------------------------
 
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