Intel will likely announce the Intel 946GZ and 946PL chipsets on Monday. Both chipsets will support Intel Core 2 Duo and Pentium D processors with an FSB up to 800MHz.
This is perfectly fine for mainstream PC users as mainstream Core 2 (specifically the C2D E4200) and Pentium D processors are limited to an 800 MHz front-side bus. Dual-channel DDR2-533/667 memory is supported like previous 945 Express chipsets.
The difference between 946GZ and 946PL Express will be the integrated graphics core on the 946GZ Express. While Intel is ready to unveil its G965 Express with a brand new GMA X3000 graphics core the 946GZ will be stuck with the existing GMA 950. 946GZ and 946PL Express chipsets will also support one PCI Express x16 graphics slot.