68040 particularities

[alewis]

My experience a bit different. Going from a B2000 with GVP 68030/40MHz to an A4000/040, the A4K felt nippier in day-to-day use. Going to a WarpEngine@40MHz blew the B2000 out of the water. of course, this was [probably] more due to the on-board DMA SCSI, faster (high data density, lower latency) SCSI drive, and then batter gfx card.

Going from a Warp040 to a CyberstormPPC/060, well, there is hardly any difference at all other than disk performance (which should be given its UW-SCSI3 vs SCSI-2)

Warp SCSI returns avg 8MB/sec
PPC SCSI retunrs avg 28MB/sec...

Same drive, limited by the 8bit narrow SCSI bus on the Warp.

But in day-to-day use, it actually feels slower. SysInfo's limited benchmark, iirc, shows it to be about 15% faster... TBH I don't consider it worth what I paid for it, even the "benefit" of a 16bit UW SCSI bus...

[alewis]

Hmm, well I have a Blizzard 060 in an A1200, and the experience is the same with that. Its fast, but not the "kick in the pants" step up from an 040. BTW, it's a CyberstormPPC/060 in the A4K, also has a Cybervision64/3D, and a 10K RPM U160 SCSI disk - which is a tad wasteful, but hey.

Dennis wrote:
Maybe the blizzardppc was not a very fast design due the bus sharing with the PPC. Also, the blizzard1230 was a very fast design at the time. Maybe the step from a "fast" 030 to a "slow" 040 is not that great a step. The cyberstorm MKIII in my 3000 was VERY fast however. Together with an atlas-IV drive and a cybervision64/3D it was a very nice setup. Too bad MKIII's don't live that long.  :-(

Dennis