http://www.asrock.com/mb/Intel/G41M-VS2/
Memory
- Dual Channel DDR2 memory technology
- 2 x DDR2 DIMM slots
- Supports DDR2 800/667/533* non-ECC, un-buffered memory
- Max. capacity of system memory: 8GB**
*DDR2 533 is supported with FSB 533 CPU.
**Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows® 32-bit OS. For Windows® 64-bit OS with 64-bit CPU, there is no such limitation.
***In order to maximize the system memory, please install 4GB memory module with 16 cells or 2GB memory modules with at least 8 cells.