What is the pentium4 IBM MT-M8305-42A motherboard operating voltage of CPU?

If your computer is an IBM NetVista 8305 2.4GHz Desktop:

1. Processor support is Pentium 4 up to 3.4GHz, or Celeron up to 3.2Ghz,
http://www.cpu-world.com/Sockets/Socket%20478%20(mPGA478B).html
2. Motherboard/Processor Socket 478
3. See the voltage and more technical data in the BIOS
4. Data bus speed 533.0 MHz
5. RAM is 1GHz Max of DDR PC2100 SDRAM - Non-ECC 266.0 MHz
up to 2GHz according to: http://www.okmemory.com/IBM-NetVista-M42_8305-D44509-me... & http://www.tigerdirect.com/applications/SearchTools/ite... ... For the exact maximum go to a RAM configurator at kingston.com or crucial.com
6. Expansion slots: Four
PCI slots; Three
AGP slots; One
These specs are according to the linked websites but as you may see on line 5, a System Information application would give more accurate information.

IBM NetVista 8305
http://www.overstock.com/Electronics/IBM-NetVista-8305-...

IBM NetVista M42 8305 - P4 2.4 GHz (03/21/2003)
http://reviews.cnet.com/desktops/ibm-netvista-m42-8305/...

For more complete information, you can see the motherboard model with applications such as Aida32, Everest Home, Speccy,.. and with the mobo model you can search for the PDF manual with keywords; motherboard followed by model and manual Example: "download Intel Desktop Board D845GVSR Product Guide (or manual)"