Logic Pro system overloaded and MIDI clock problems with Intel

Question

Hi
I'm not a super-powerful-rich music producer. I have owned an iMac G5 1GB of RAM for tree years with a lot of problems with the memory, but i could achieve a quite good knowledge of Logic Pro 7.1.1. The thing is that with my new iMac that has a larger memory i'm not able to playback old songs, and it sounds strabge to me because the Intel iMac would have to work better than the older....I think....(the file i'm talking about has got 5 tracks, 4 freezed and one not: it sounds really strange even if I haven't 5 GB of memory!!!)
Moreover I've had other new problems with MIDI sync but i've never used other MIDI clocks sources even if I use a M-Audio pro 88 keyboard and an audio interface ESI Quatafire 610. I know that i haven't got a great instrumentation in my hands, but this doesn't mean that it doesn't have to work.
Do I need Logic 7.2? Do I need to change my audio interface?
Do I need to set up logic in a way that with iMac G5 hadn't be necessary?
I'm waiting for an answer from someone who's more capable.
Thank you.
Luigi
iMac 2 GHz Intel core duo 20" 1,5 GB RAM Mac OS X (10.4.8) Audio Inteface ESI Quatafire 610

Answer 1

Do I need Logic 7.2?
absolutely definitely, you need a minimum of logic 7.2. it is the first version that is intel-native. your problems are 100% because the code you are trying to run has to be emulated first in order to be interpreted by the intel chip in your imac. this means that logic will run like a sick dog, until you give it a version that is actually compatible with your machine.