hello i just got a asus p5g41c-m lx use got both ddr-2 n ddr-3 on the board can i run both ddr-2 n ddr-3 togethere
No. One or the other. That slightly odd board will run either, not both.
From the Asus site:
2 x DIMM, Max. 8 GB, DDR3 1333(O.C.)/1066/800 Non-ECC,Un-buffered Memory
2 x DIMM, max. 8 GB,DDR2 1066 (O.C.) / 800 / 667 MHz Non-ECC, Un-buffered memory
Dual Channel memory architecture "*DDR3 and DDR2 memory can not be used simultaneously
Use DDR3 memory modules on the black slots and DDR2 memory modules on the blue slots."
** Refer to www.asus.com or user manual for Memory QVL (Qualify Vendor List)
*** When installing total memory of 4GB capacity or more, Windows® 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended.