The NB76 features a slot layout of 5 PCI, 1 AGP, 1 CNR and 2 DIMM. The fact that the NB76 only features two DIMM slots may seem odd to some of you, however, the i845G chipset only supports a maximum of 2GB memory and DFI would be going out of spec if they included any more slots.
One thing I was quite disappointed with was the fact that the i845G chipset only supports DDR266 memory. Competing chipsets such as the SiS645DX and the upcoming VIA P4X333 already have support for Intel's new 533MHz bus, but feature DDR333 as well. In a Pentium 4 system, DDR333 provides a tangible performance increase over DDR266 and I can't help but be slightly disappointed here. Nonetheless, we must remember that this board/chipset is directed at users who are looking for a low cost, highly integrated motherboard, rather than maximum performance.
The ATX power connector is well placed so that your power cables do not run over the top of the heatsink/fan unit, restricting airflow. The IDE and Floppy connectors were also logically placed so that they are not in the way of the PCI slots and can be easily reached.
Cooling the i845G northbridge is a silver passive heatsink. An active cooler is not required for the i845G Northbridge as it already runs quite cool. The lack of a fan is an added bonus for those of you that require your system to run as silent as possible.