Measuring Power on DE2-70

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Yes true it’s not possible to measure a voltage drop across the 0 ohm resistors. But RS1 and RS2 are 10m ohms, these wouldn't need to be replaced if the voltage drop across them is measurable?

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I didn't have a copy of the schematic last time I replied. Now I see what you mean; they've got 10 milli-Ohm resistors in the path for VCCINT.

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If the voltage drop across them is too small to be measured accurately couldn't I pass it through an amplifier circuit?

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Yes. That's why I suggested using a pair of scope probes, and then use the difference to measure the voltage drop. If you have access to an instrumentation amplifier, then you can measure the voltage drop over the resistor.

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Also would it be safe to say that if I only want to measure the FPGA core power I would only need to measure the voltage across RS1 and RS2? And if I want to measure only FPGA I/O power, I would need to replace the 0 ohm R127 and R128 with a suitable value?

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Yes.

Cheers,

Dave