On May 18, 2004, at 03:07 pm, [EMAIL PROTECTED] wrote:
The DiiMO proved to be unstable in the SE/30. :( Itworked well inthe IIsi I pulled it from. Maybe I have slow RAM or something. It would create video artifacts and eventually lock the machine (under MacOS) or cause some sort of kernel trap exception (under NetBSD). Some rather unscientific (bogomips) benchmarks would vary wildly, between 1.5 and 20.
Sounds to me like it was overheating. Dunno what to suggest
as an idea - but it probably needs cooling with a fan of some sort - if it sticks
vertically in the PDS slot it is out of the airflow path in the case
It sits horizontally about 1cm above the (7200 rpm) HD.
If that is where I think it is then it's still out of the airflow AND the hard disk will be heating everything around it up a lot. 7200rpm drives get very hot and anything in the surrounding area also heats up as a result.
(unlike Daystar's CPU socket accelerator). If you can find an old 486 CPU fan you can maybe rig it some ventilation by taking power from the hard disk power lead.
I should be able to test the theory by running with the case off in a well-ventilated room.
Remove the hard disk and stick it on extended cables away from the system and test, then put it back and test with the case off. If the former works but the latter doesn't you have your culprit. If neither works try using a small fan to blow air out of the machine over the CPU with the case off also, and then again without the hard disk present. If non work you can safely rule out overheating.
Do I have to worry about power consumption by putting an extra fan in there?
Not if you get a tiddly little 3cm heatsink fan - they barely draw any significant current. Speaking of heatsinks - does the CPU have one? I have Powercache 030/50 that has no H/S and that got too hot really for my liking. Kinda moot now as the SE/30 board it was on died and i don't have another socketed board :(.
Anyhoo - do everything you can to keep the CPU cool and see if it changes the situation. The benchmarks, lockups and slowdowns all point to overheating IMHO.
I was pretty excited when I found this card. I'm going to be bummed if I can't figure some way to use it. :(
Don't despair. You know the card works in a IIsi so it's not all bad. Just need to persevere!
-- Mark Benson
AIM - SilValleyPirate MSN - [EMAIL PROTECTED] Visit FlatPackMacs online: <http://fpm.68kmac.com> Visit my Homepage: <http://homepage.mac.com/markbenson>
"Never send a human to do a machine's job."
-The Matrix
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