> I wonder if using external PCI-E graphics card will allow to go above
> this magical barier
No, not at all. PCI-E frequency depends on FSB frequency lineary. It is FSB / 2.66 = PCI-E. This means that PCI-E runs at 150MHz when FSB is set to 400MHz. NONE of external PCI-E card can work at this speed. It also explains why internal SATA/ATA controler cannot work reliably when FSB exeeds 330MHz.
It is however *magical* that I am able to set FSB to 400MHz and get internal graphic card working. But I've recently learnt that it works reliably for only around 2 hours with FSB=400MHz. I've found experimentaly that the board works stable all the time with FSB set to 386MHz and PCI-E set to 145MHz (of course with internal SATA/ATA disabled).
Summarising : this is a CRAPPY board. Don't buy it AT ALL. Go and but Asus P5B.
> this magical barier
No, not at all. PCI-E frequency depends on FSB frequency lineary. It is FSB / 2.66 = PCI-E. This means that PCI-E runs at 150MHz when FSB is set to 400MHz. NONE of external PCI-E card can work at this speed. It also explains why internal SATA/ATA controler cannot work reliably when FSB exeeds 330MHz.
It is however *magical* that I am able to set FSB to 400MHz and get internal graphic card working. But I've recently learnt that it works reliably for only around 2 hours with FSB=400MHz. I've found experimentaly that the board works stable all the time with FSB set to 386MHz and PCI-E set to 145MHz (of course with internal SATA/ATA disabled).
Summarising : this is a CRAPPY board. Don't buy it AT ALL. Go and but Asus P5B.