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Well, I never would have believed that I could reach the lofty heights that I have reached in overclocking my LC475 when I started down this path, just one month ago! So much has happened in that time, that it seems more like 3 months have passed. Many thanks to @Kay K.M.Mods for making Spicy...

Hooray! 🥳 Thanks to another thread, I think I have solved my problem, using both SCSI2SD and BlueSCSI on the same computer. I swapped the BlueSCSI out and installed the SCSI2SD a few weeks ago on my LC475. Copying all of the files over worked fine. Lately though, when trying to copy files from...

This may not help, but @luminescentsimian response above has appeared to help me. I have a SCSI2SD mounted internally on my LC475 and have been trying to use a BlueSCSI externally, to use to transfer large files to the LC475, since it's much simpler to modify a drive image in an emulator, then...

Well shucks, there doesn't seem to be any faster VRAM available, now that I can finally make use of it! 😣

I have a full 68040 that I got off Ebay. No, I bought the Spicy O'clock overclocking gizmo. Here's the link: https://en.infinityproducts.co.jp/product-page/spicy-o-clock It only supports a handful of models, fortunately the LC475 is one.

HOLY CRAP, IT BOOTED!!!! 😱😁 Or, as Adrian Black would say, "it works, it freakin works!"! So, as I said in my previous post, I really would rather not have to do that again! But if I had to, I would not try to drag solder the new clock generator chip! After I cleaned off the pads, put some...

OMG! I never want to do this again! I hope this works!!!!🤞🤞🤞🤞🤞

The two MC88196DW80 chips that I ordered from Utsource, finally arrived yesterday afternoon. I didn't jump right on it...why rush?! This morning however, I got the board out and insulated all of the plastic parts, so as not to melt them. Then I took a break, to wait for a slight headache that I...

Ever since I connected an old digital monitor, designed for use in a 5.25" drive bay, by running wires through the PDS external 'port', I've been able to monitor my power supply voltages and by using thermocouples, internal temperatures...mainly the CPU. The voltages have never been rock steady...

Aha! Now I understand. It doesn't matter what you set Spicy O'clock to, above a certain point, your clock generator has a limit and won't go higher! I didn't get this before...translation software has some way to go yet! 😄 Well, I've found my limit with the MC88920, which is ~40.5mhz. So, now...

While waiting for my clock generator chip to arrive, I've been messing around with heatsinks. Ever since swapping my stock LC68040, with a full MC68040, I had been using a slightly too large, 16.5mm tall, aluminum heatsink, with Arctic Silver 3, thermal compound. In preparation for, hopefully...

I know that JDW talks about this in his videos, but does anyone have any idea as to why booting from floppy is so much more reliable? Is the SCSI chip just less resilient to overclocking? Or possibly this relates to modern SCSI replacements, since I'm using SCSI2SD. Once booted however, there...

I ended up not testing it, although the only way to find out anything, would be to test it. After some research, I get the feeling that the low surface area will reduce it's effectiveness. I do know that the other heatsink/fan is starved for air with the case on. After the Noctua fan comes, I'm...

Here is another option I have, I even was able to slip a thermocouple underneath the fan! Fits perfectly and plenty of clearance (definitely no clearance on the other). Much less mass in it though, so I wonder, I guess I would just have to check it. BTW, these are apparently still available! God...

I have a number of old heatsinks, collected over the decades. I no longer remember where this one came from and the original fan is long gone. It could almost have been made just for this application....if not for the humongous SIMM. I tried rotating it, so the airflow would have an easier path...

This wouldn't work for me, as my humongous 128MB SIMM (physically and electronically) would interfere. I'm currently experimenting with my 2nd heatsink, which is physically a bit smaller, but has a central recess, that allows me to mount a fan. Currently it looks like it's keeping things a...

Incidentally, I did more experiments on whether BlueSCSI or SCSI2SD was more amenable to overclocking in my machine's current state...there's no perceptible difference. I had hoped to throw my last used physical drive in the mix, but sadly it appears to have given up the ghost in the short time...

Okay, so the cause of the boot 'screen glitch' was that the boot disk scsi id was 4. I changed it to zero and the glitch disappeared. Perhaps scsi id 1 would also work...I'm not really interested in seeing where the limit is, just happy that it's not an artifact of my recap job!

On another topic, what's a good material to use to reattach broken case parts? Acetone isn't cutting it on the fan clips.

Well I'll be! Who wants to guess the reason for the...odd...behavior? You Mac gurus will probably know...😄 If nobody 'guesses' before then, I'll post the answer this evening. Problem solved!