The OR840 and other i840 based mobos do come in Slot 1. I thought about recomending it but they are horrible expensive. This compounded by a Catch-22. You can save money by using the SDRAM version. The memory controller hub really cuts into performance. The RDRAM version used the more costly Rambus RIMMs. being dual-channel, the RIMMs must be installed in pairs and any unpopulated slots must have CRIMMs. Having worked with the boards I can say they are great and rock stable. Just very expensive at around $350 - $500 depending on what is included (LAN, SCSI, etc.)
Windogg