can the adaptec 29160N ran at 133mhz FSB?

[gregshin]

I got a IBM DDYS 10,000RPM HD and Pioneer SCSI 6x drive attached to the card. Can they run at 133mhz FSB?

 

[Peter]

No they can't. BECAUSE THEY'RE NOT RUNNING OFF THE CPU FRONT SIDE BUS.

The Adaptec card is on the PCI bus, which should be at 33 MHz. Check _THAT_. Your mainboard should be capable of doing that, even those overclocked-from-factory Intel "BX133" boards can.

And the SCSI drives are on the SCSI bus, which in turn is dynamically clocked by the SCSI processor at 5 to 80 MHz, individually depending on the capabilities of the drive that gets accessed.

Regards, Peter

 

[gregshin]

Hmm...intresting what if i'm gonna use the Asus CUSL2? Can't adjust the dividers and Bus speeds to 133/100/133? Will that work? I plan to use the mobo and a P3 700@133mhz.

 

[Peter]

Hello? Listen, please. The PCI bus runs at _33_ MHz, not 100, not 133.

Whatever regular CPU or DRAM bus speed you choose, be it 66, 100, or 133, this does not change the PCI bus speed. Only if you overclock from one of those settings, like from 66 to 75, or from 100 to 112, only then you raise the PCI bus speed along by the same percentage - 37.5 MHz in your example ... and while that might cause problems on the PCI side of things, it still won't affect the correct clocking on the SCSI cables.

Regards, Peter