No can do guys.
Currently I don't have a functional Sonnett card.
But I am looking for a replacement.
My old card was a 7447.
I'm looking for a 7448.
Personally, I'd be willing to bet that David's 1.42 Mhz processor (with its better caches) is a fair match for a faster 7447.
A 7448 might have a slight edge.
I'd like to see.
What tests do you propose David?
I am sorry to hear about the demise of your mighty 1.8GHz G4 accelerator. I hope you did not lose too much money on that purchase? How long did it last? Did you at least get a year or more fun from using it, or did it die sooner than that?
This is one of the reasons why I chose to get the stock Apple 1.42GHz Dual G4 CPU board. Hopefully it will be more reliable and live longer.
Of course, if I over-clock it, that will likely shorten it's lifespan. I may just keep it at it's stock speed. Due to cooling limitations with my new quieter main CPU fan, which does not push quite as much air as the noisy stock fan did. I need to find the better copper heatsink that came with the 1.42GHz PowerMac models, or find a better after-market heatsink that fits.
The only Apple MDD Dual G4 copper heatsinks I have found are $50, which is more than what I paid for my entire MDD PowerMac and the same price I paid for the Dual 1.42GHz G4 CPU board. I might bite the bullet and pay the $50 for the copper heatsink, if I can't find a better alternative.
I think I switched heatsinks between one of the single 1.25GHz G4 MDD PowerMacs and my current dual 1.25GHz PowerMac, because I thought the one I have now looked more efficient than the other design which looked like Tin fins, not aluminum. Since I sold all of my other G4 PowerMacs, I can't switch back so I found one of the original Dual 1.25GHz G4 heatsinks on eBay and bought it. It was only a few dollars and should arrive in a few days. I am going to install MacOSX10.5.8 on one of the 4 hard drives inside my G4 PowerMac, then install iStat to show me the temperatures of various components, including the G4 CPU's. This will show me which heatsink is more efficient (hopefully). I also have a independent heat sensor that I can install attached to the heatsink and measure the difference between using the two different heatsinks.
I think that for MorphOS use, the single 1.25GHz G4 (over-clocked, or not) is probably the best choice (bang for the buck) with it's L3 cache and cooler operation. I should have bought one of those instead of the dual 1.42GHz G4 and just forget about running MacOSX, or Linux on my G4 PowerMac.
The only reason I hesitate about doing this is because my G4 PowerMac came with an expensive Avid Meridian video/audio editing software and hardware w/8 audio inputs/outputs & 4 video inputs/outputs, that I would like to use someday.
Sorry for slipping off topic there. The software suggested by others in this thread sounds like a good start for comparing different G4 PowerMac CPU cards performance. We can agree on what tests to run later, when you have replaced your 1.8GHz Sonnet G4 card, or someone else with the same setup steps forward to participate in this comparison.
Edit: Off Topic, but if anyone reading this has a G4 PowerMac and is interested in audio, or video editing, I have 3 or 4 of those Avid Meridian editing suites with all the PCI cards and the external input/output boxes that I would like to sell cheap. So, if anyone is interested in an Avid Meridian setup, let me know.