Forgot BIOS password, need to reset it [duplicate]

"See pages 12-13 of the user manual for your D975XBX2 motherboard. The battery is listed as item V in Table 2 on page 12, and the CMOS reset jumper is listed as item S. The diagram on page 12 should help you locate these on your motherboard.
Pages 52-53 specifically give instructions on clearing your password. As you may have already noticed, the procedure for clearing your motherboard's password is different from most consumer-grade motherboards. Here is the summary, but it would be helpful for you to see the diagrams in the user manual:

Clearing Passwords
This procedure
assumes that the board is installed in
the computer and the configuration
jumper block is set to normal mode.

Observe the precautions in ""Before You Begin"" on page 25.
Turn off all peripheral devices connected to the computer. Turn off
the computer. Disconnect the computer’s power cord from the AC power source (wall outlet or power adapter).
Remove the computer cover.
Find the configuration jumper block (see Figure 30).
Place the jumper on pins 2-3.
Replace the cover, plug in the computer, turn on the computer, and
allow it to boot.
The computer starts the Setup program. Setup displays the
Maintenance menu.
Use the arrow keys to select Clear Passwords. Press and
Setup displays pop-up screen
requesting that you confirm clearing
the password. Select Yes and press
. Setup displays the
maintenance menu again.
Press to save the current values and exit Setup.
Turn off the computer. Disconnect the computer’s power cord
from the AC powe source.
Remove the computer cover.
To restore normal operation, place the jumper on pins 1-2.
Replace the cover, plug in the computer, and turn it on.

Have fun! :)"

"does the motherboard have a battery on it that can be removed? try that!

That used to work back in the day. Remove the motherboard battery, wait a few days to make sure anything storing a charge dis-charges & put the battery back on. The password is gone & the time needs to be reset."