I am trying to upgrade my Zip GS to go 12 MHz. I replaced the Cache with 15nsst static memory, and I replaced the old Cpu with the new 14MHz one. When I insert the 50MHZ OSC it will not bood. Theonly one that will work is the 36MHZ OSC. Is there something else I have to replace to make it go 12MHZ? Thakns Troy