PCI-X 424 G5 card issues

[tatosan]

I recently bought a dual g5 2.3 1gig Ram and had to upgrade to the PCI-X 424 G5 card due to PCIX slots. Now when i am recording, when i hit playback, i get "Processor overload " warnings and have to stop. It should be impossible, since it's a faster rig and nothing else has changed. Has this been reported elsewhere? Shouldn't my hardware setup offer me a larger buffer than 1024? Maybe an issue with idle-only software i am running? (although i did that with the slower 450 dual g4 and no problemo?) Thanks for any light shed on this matter.

[sdfalk]

If you're running Motu hardware 1024 is the largest buffer setting you get.
I can't recall for certain (someone else feel free to step up) but I believe
which PCIX slot is used can be one of the root causes of the problem.
I'm using a 2408mk3 with various other bits of hardware hooked up
to a single G5 with no problems (of that sort anyway)

[tatosan]

Thanks for reply. Motu emailed me and told me it makes no difference which pci slot i used. Strange since some run at 133 and others at 100, (they didn't tell me which is which), but....I get cpu spikes, not always but usually when least desired. I might have to do a clean install of 10.4.2, elsewhere on this forum i read that it helped some people with the spikes, although their setup was different. Or maybe get a faster HD... i am at loss a bit, but thanks for helping...

[sdfalk]

Have you tried all the standard stuff?
Such as Repair disk permissions and such.

here's a free Utility that can help as well.

http://www.titanium.free.fr/pgs/english.html

Also If you don't have DiskWarrior for repairing/optimizing
your Disk Directory, it's well worth the money.

www.alsoft.com

I should also mention that I have had compatability issues
with some third party plugins/VInstruments
Tassman was one that caused audio spikes for me.