I checked on Asus compatibility chart for their P5G41T-M LX* (click here) and noticed the Intel(R) Pentium(R) Processor for Desktop E5700 is currently listed as compatibile as long as the BIOS version is 0602, at least.
As for "6500", if you rather mean the Intel(R) Pentium(R) Processor for Desktop E6500, I confirm it is also shown as compatible, with BIOS version 0301, as minimum.
I'd still suggest contacting either your place of purchase or Asus for more information regarding the board, its general compatibility and features.
* Note: They don't list 'P5G41T-M LX3', per se.
Thanks for replying.