Motherbord is gigabyte ga m720 us3
Here is the screenshot:
http://gpuz.techpowerup.com/19/02/17/c4r.png
I went thru all my older machines and none of them show that "board power limit" in GPU-Z. I don't even know how GPU-Z would
know what the board power limit is.
Besides that, your motherboard has an industry standard PCI Express X16 slot rated at 75W. Industry specs state: "
A full-sized ×16 graphics card may draw up to 5.5 A at +12 V (66 W) and 75 W combined after initialization and software configuration as a "high power device".
I would consider that a nonsense spec generated by GPU-Z and ignore it, myself. If you want, jump over to the
GPU-Z Support Forum and ask why the pgm is reporting that.
GPU-Z might be reading that due to the system being at idle. Run something like
Furmark to load the GPU and check GPU-Z again while under max load.
Note: That card is only using the first 8 lanes of the PCIe x16 slot. That may have something to do with the odd reading, but the full 75W capacity should be available to it.