The 915PL is a discrete chipset; the 915GL integrates Intel's Media Graphics Accelerator 900 DirectX 9 engine. Both support a 533MHz or 800MHz frontside bus, HyperThreading-enabled CPUs, PCI Express expansion and a dual-channel memory bus.
Unlike previous Grantsdale parts, however, the new chipsets only support DDR SDRAM, not DDR 2 memory. The 915PL supports only a single DIMM per memory channel, whereas the 915GL supports two DIMMs per channel. The two chipsets can handle up to 2GB and 4GB, respectively.