L2 G3 upgrades in a Power Macintosh 6500

[derFunkenstein]

Bought a G3 upgrade from willmurray461 and it was super unstable in my PM 6500/225 when I first got it. I read this page from the 6400 zone: https://machut.net/mirrors/zone6400/L2G3_spec_comparison.html

Apparently, the chip on the Sonnet upgrade faces the "wrong" way because it's facing the RAM rather than the original processor, and apparently something can get quite warm, either the RAM or the CPU. So I did some thinking and jerry rigged up this with a 50mm fan and a few zip ties. I've had it looping MacBench 5 for like three hours today while I was working, and it's rock solid. Not really new information, just wanted to share.

 

[Byrd]

I've got a slimline fan on mine too (Sonnet L2 G3 400Mhz @ 500Mhz), not like it's roasting hot but temps do jump up fairly quickly under load.

 

[derFunkenstein]

Do you have anything less janky? I’ve been looking for something 3D printed and come up empty.