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I've made a quick STL model of the insert shown above. If anyone has a Quantum Maverick with a sticky bumper issue, try printing this out and installing it, with a dab of glue to hold it in place. The circular cutout faces down and the 'bulge' faces towards the platters.

You're welcome – glad you enjoyed. Interesting :) I didn't specifically check boot up or file copy, but I'll add them to my benchmark list in future projects. For these tests I reckon the main bottleneck would be the mechanical hard drive and the slow ATA bus (16.6 MB/s).

WHOOPS. My bad.

I don’t think it matters on the IIci.

They look fine. I would try installing them in Bank B and putting some of your stock SIMMs in Bank A. I know you're wary of clipping and unclipping these things..

I didn't mean to put back the SIMMs you started with, I meant to try another set of RAM entirely. Can you share pics of the RAM you bought, so we can see compatibility?

Could be dirty contacts though. In reality you’ll need to try another set of SIMMs to rule out the issue.

It’s probably either bad ram or badly seated ram.

Here are my benchmarking results for the 100MHz bus overclock, compared to stock. CPU was set to 300MHz for both the 66MHz and 100MHz configurations. Each test was performed three times and an average score recorded. TaskResultsIncrease Xbench benchmark7.78 --> 8.488.3% iTunes...

I’ve done something similar to this today. I cut up a piece of old PCB and used kapton tape to get it up to the right thickness. Then I fixed it in place with a couple of small dots of superglue. Seems to work alright so far. No need to get under the platters or even take off the lid more than...

Here are diagrams for the other two boards that need recapping. @3lectr1cPPC could I invite you to add these to MacDat?

Here's an annotated diagram of my M1297's PSU. @jmacz it would be good to see how your M0401's non Sony PSU looks.

I've desoldered all my caps and can confirm that board B (A-1135-676-A) and board D (A-1345-967-A) are identical to @jmacz's boards. All of my caps looked good visually, except for C529 which had bulged and heavily leaked. C524 also had slightly leaked. I retract this statement – while the...

This exactly matches my M1297's PSU.

So I just started taking my M1297 apart to recap and the PSU board is completely different to yours. Boards B and D look the same just from a quick look at a few caps. I wonder if you grabbed the PSU cap list from the wrong monitor or if the M1297 had different PSUs. Mine is a CRZ-700A...

New visitor. A parts dual 867. The case design is actually quite logical and well engineered but it’s crazy just how much they’ve hacked this case design about to beef up airflow. I think someone must’ve been panicking about the amount of heat the 7455s put out.

Isn’t that the 12” RGB monitor (M1296)?

I wanted to convert this into a DIP switch block but couldn’t find anything suitable to solder onto the footprint. I have little jumpers that I have to change with tweezers and sometimes they fly off into some corner of the case :P

I would argue it’s not specially the 33MHz bus, but more likely the 32-bit access to ROM/RAM (where most PPC are 64-bit), and the 25MHz 16-bit ‘030 peripheral bus (so disk access and frame buffer performance is hobbled). Architecturally these things were like a PowerBook 500 series with a PPC...