gvpscsictrl is the utility you need to set synchronous mode. it should be on the gvp install disk i think
Also another note, if you are using any external devices,i seem to recall the gvp does not supply term power.
I wonder if you can do speedgeeks 33c93a scsi chip overclock hack for more speed? feel like being a guinea pig on the gforce mike?
There is a good chance the 33C93A is already running at 14MHz this being a later model/revision accelerator card.
The 33C93A is rated for 16 MHz and therefore is
NOT overclocked at 14 MHz... but it does need to be configured correctly (for reliable synch mode operation) at any supported CLK speed.
