Apparently, the next generation Bearlake chipsets (X38, P35, G35, G33, Q35, Q33)
no longer support Netburst architecture. Therefore the current Pentium 4 and
Pentium D processors cannot or rather are not supposed to run on Bearlake
boards. Also only P35, G35 and X38 would support for quad-core processor. However, Core 2 Duo and Core 2 Quad are fine except for Core 2 Extreme
X6800 which only runs on X38. So officially, Intel do not support Netburst on
Bearlake to ramp the crossover to Core architecture.

intel chipset table No Support For Netburst On Bearlake Chipsets?

Apparently, the next generation Bearlake chipsets (X38, P35, G35, G33, Q35, Q33)
no longer support Netburst architecture. Therefore the current Pentium 4 and
Pentium D processors cannot or rather are not supposed to run on Bearlake
boards. However, Core 2 Duo and Core 2 Quad are fine except for Core 2 Extreme
X6800 which only runs on X38. So officially, Intel do not support Netburst on
Bearlake to ramp the crossover to Core architecture.