1. Fast and Furious: Overclocking
chips for fun and profit
@OmerK | OSHUG #30 | 28/11/2013

6. Agenda
• Comp Arch/Digital Electronics 101
• Silicon devices and overclocking
• Concept and Challenges
• Profit?!
• vftweak
• Q & A

18. “ The oscillators are fixed on the hashing board (one
12MHz, one 14.318MHz). Low switches to the 12MHz
one while High switches to the 14.318MHz one. If
you need more speed you will need to buy a 3.3V
5mmx7mm oscillator that is higher than 14.318,
unsolder the current one, and solder the new onto
the board. We tried 14.7xx and 15 before. On 1.25-
1.26V they begin to work, but producing a lot of
heat.

23. vftweak
• DS1077L Programmable Oscillator
– 4.87kHz to 66.666MHz
• MCP4661 Digital Pot
• MCP3221 ADC
• TC74 Temperature Sensor
Untested design files at
http://solderpad.com/omerk/vftweak
(I have some spare PCBs for the brave hackers
amongst you!)

24. Thank you
Any questions?