Over at VIA Arena they now have a Promise Raid Performance Patch (which seems a lot like the PCI Latency Patch) which they Quote- "This patch, for all Microsoft Operating Systems, will increase the burst rate. This may not be noticeable in overall Hard Disk performance benchmarks as burst rate is not measured separately and only makes up a small percentage of Hard Disk performance. but if you are having unexplained problems you can download it directly from this link.