This page will show you how three easy steps to fix the PCIe reset bug when plugging in GPUs on MACCHIATObin revisions 1.2 and lower.
Step 1
We will start by pulling down resistors from pad A11 do GND (A12 was chosen as a close by GND signal). For this, use resistor value range from 1 KOhm to 4.7 KOhm. This is shown on the image below:
Step 2
Now we need to cut the plastic part of the PCIe x4 connector to make it possible to plug in x8 or x16 add-in-cards:
Step 3
Lastly, if the JTAG connector (as shown below) is assembled it needs to be unsoldered:
And that is it, the PCIe on your MACCHIATObin should now correctly reset when plugging GPUs.
Have in mind the following batch notes:
- The September batch of MACCHIATObin has the resistor assembled (Step 1)
- The second MACCHIATObin batch and the September batch have the JTAG connector disassembled (Step 3)
- Part of the September batch has a PCIe connector with open slot.