no problems, it's an 865 chipset, probably DDR400, I'll check and confirm
Four 184-pin DDR SDRAM DIMM sockets
Support for DDR 400, DDR 333, and DDR 266
Support for up to 4 GB of system memory
LINK TO YOUR BOARD SPECS
CPU-Z will tell you whats in there, if you're buying more all modules will run at the lowest speed e.g. if you have DDR333 and put in DDR400 the 400 will run at 333 speeds.