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On the G4 CPU, the external memory cache is configured with a register. In the following example a 600MHz 7400 CPU has an actual 2MB of L2 "backside" cache physically existing in hardware, but reduced amounts of 1MB, 512K, and zero L2 cache can also be set in software. This picture is showing...

I recently picked up my first Titanium, a second generation version with a 550MHz G4. Right away I started comparing it to a PowerBook Pismo with a 550MHz G4 upgrade. I was thinking that the Titanium would also have a 7410 CPU, but it turns out to have a 7450 without cache so it's probably the...

FYI, I discovered that the slightly newer versions of the ATI graphics cards have really nice copper heatpipe heatsinks in them. Unfortunately the mounts are different, so I made a bracket to convert the hole pattern. This works great in the MDD as it also blows the hot air out the back...

I was looking at the pin-out for the 7447 and I think it could be adapted to the 7400. Would people be interested in this? The main application I can see would be to install faster 7447 chips onto these boards for use in the Cube: These boards fit a Cube and are relatively available; the...

Does anyone know of a good heatsink upgrade for the MDD? This is the last one I did: Its base is wide enough for both CPUs and it runs quiet and cool with the large area and heatpipes. However it encroaches on the RAM area and hard drive area. I was able to keep 2GB with different RAM...

FYI, the rocketRAID cards seem to work fine in the G4 towers. I've tried this card with an AGP and a Quicksilver. I've never had a need for something like this, but the prices are low enough now that "just for fun" is a good enough reason to play with one. I added a stack of old laptop drives...