The QVL (qualified vendors list) is here: ASUSTeK Computer Inc. -Support- Drivers and Download P5G41C-M LX
It doesn't list any DDR3-1333 memory, though. That doesn't mean that it's incompatible; Asus may simply have not tested it.
Is there any reason you're looking at a motherboard with two DDR2 slots and two DDR3 slots? I hope that you're aware that you can't use DDR2 and DDR3 at the same time. In effect, you'll have two memory slots. (On the other hand, if you want a microATX board like the one you've listed, most of the Socket 775 ones seem to have only two DIMM slots. www.newegg.com
lists a few full ATX boards with 4 slots, but Newegg doesn't ship to South Africa.)