Yup, I have the RAM interleaved correctly. I tried what you suggested but it didn't change anything.
I put the 604 back in and ran a set of tests with MacTest Pro. It passed all of them and I'm now redoing the RAM/VRAM tests on the long settings so that's going to take a while. So assuming they pass then I can rule out any failing hardware in the system as-is. I don't think there's anything wrong with the G3 card either as it worked perfectly fine when I got the 7500 last year.
When the tests are done I'll shut it down for a half hour or so and then try a cold boot with the 604 installed. It should power up fine. Then I'll swap in the G3 and try again. Is it enough to just swap cards and hit the CUDA switch?
Update: The tests all passed (I just ran the extended RAM test as it told me the long one would take 20-40mins per MB). I left it sitting for 30 mins or so and fired it up. Booted up just fine with the 604. So I'm leaving it for a little while and then I'll put the G3 card back, hit the CUDA reset switch and see what happens.
I put the 604 back in and ran a set of tests with MacTest Pro. It passed all of them and I'm now redoing the RAM/VRAM tests on the long settings so that's going to take a while. So assuming they pass then I can rule out any failing hardware in the system as-is. I don't think there's anything wrong with the G3 card either as it worked perfectly fine when I got the 7500 last year.
When the tests are done I'll shut it down for a half hour or so and then try a cold boot with the 604 installed. It should power up fine. Then I'll swap in the G3 and try again. Is it enough to just swap cards and hit the CUDA switch?
Update: The tests all passed (I just ran the extended RAM test as it told me the long one would take 20-40mins per MB). I left it sitting for 30 mins or so and fired it up. Booted up just fine with the 604. So I'm leaving it for a little while and then I'll put the G3 card back, hit the CUDA reset switch and see what happens.