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We got a few questions about the Ultra SCSI Fast20 beta firmware so I wanted to share some details! This is an overclock to the Pico1/2 that allows the latter to almost saturate a 20MB/sec Ultra SCSI Fast20 bus! Real world results will vary of course, but here’s what we’ve seen so far! (1/6) 🧵

First you’ll need a SCSI card that supports FAST20 – We have a list of ones tested. These are usually not narrow cards so either have to have a 50p port for backwards compatibility or an adapter. It’ll need high bit term. For Macs this really only came in optional cards in the G3/4 line (2/6)

Next we have Mac84 benchmarking his PowerMac getting 15.6MB/sec using a 2940W PCI SCSI card! BluesSCSI v2 with a Pico 1 (4/6)

Speaking of benchmarking – there are tons of factors that go into getting the best numbers. One thing Macintosh users can do right now is make sure you’re using the right SCSI driver – See @thisdoesnotcompute.bsky.social video on it www.youtube.com/watch?v=_eCF... (5/6)