The ASRock P43R1600Twins-WiFi
At first glance, you'll find that there's actually little that is unique about the ASRock P43R1600Twins-WiFi (henceforth known as ASRock P43), apart from its six DIMM slots. It has six because it supports both DDR2 and DDR3 memory (two DDR3 and four DDR2 slots). You can't use them simultaneously of course, but the ability to accept either type of memory can come in useful for those looking to take advantage of the cheaper DDR2 memory prices now, while hedging their bets with the possibility of upgrading to DDR3 memory in the future when the prices become more attractive. For example, one can go with the base-level Pentium Dual-Core processor and DDR2 memory now and perhaps upgrade the system with a high speed Core 2 Duo and DDR3 memory in future.
Surprisingly, in this time and age, we somehow seemed to have encountered an IRQ assignment/conflict issue with this board. The onboard HD audio just could not co-exist with our Ethernet PCI card and we repeatedly failed when installing the HD audio drivers, forcing us to disable the sound and rely on an external sound card for our testing.
If you are really sharp-eyed, however, you may notice a weird header just in between the PCIe x1 and PCI slots. If you are still wondering, that is for the Wi-Fi module. As the board's name implies, the ASRock P43 is capable of Wi-Fi connectivity right out of the box by means of a Wi-Fi module, which we think is rather useful as you wouldn't need to obtain an external/internal wireless adapter.