Yes, you can see page 2 of the 5I25 manual:

W1 (P2 POWER ) W2 (P3 POWER)
UP             UP                   BREAKOUT POWER ENABLED
DOWN           DOWN                 BREAKOUT POWER DISABLED (DEFAULT)



Note that you also need to set the 7I76/7I76D in the correct mode:

W2 left = gets 5V power from 5I25

W2 right = needs external 5V power

Non-mesa cards can never use the FPGA supplied 5V option so W1 should be down

The 7I76s 5V should come from the 5I25 = 5I25 W2 UP   7I76 W2 LEFT



N! ways to screw it up just grew by one.  Sigh...

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