User manual

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16 Motherboard 3.3V power supply (too weak on some Intel boards)
For Mykerinos-X only:
Due to poor layout of 3.3V traces (exhibiting too high resistance) on certain PC motherboards, even modest current drawn from the
3.3V power supply off the PCIe slot(s) may result in significant voltage drop (close to 300 mV). With residual voltage supply close to
or under 3.1 Volts (instead of the specified 3.3V) the primary switching voltage regulator of the MYK-X30 board does enter in short-
circuit protection mode. While this will not endanger the system, it will however prevent Mykerinos X30 from starting correctly and
consequently such boards are not seen anymore by the PC, requiring a complete shutdown of the PC. When encountering this
problem on a motherboard, Merging Technologies’ Technical note TN_MYK-X01 should be applied. Please consult your Merging
Sales Partner, in the event you suspect this Tech Note should be applied
At time of print, this behavior has been witnessed on the following motherboards:
- Intel D945PVS
- Intel DP965LT
- Intel DG965WH
- Intel D975XBX