Hello,

since 2 days I search a solution - maybe somebody can help me:

Motion 3 generally works unstable on my System, I had some crashes, but not only motion but the whole system so I need to restart.
I found a point where this can be reproduces: RAM preview.
Every time I render here it eats up my RAM and then it crashes. Not alyways at exactly the same point.
Even when the rendering worked, It crashes when I play the timeline.
Looks like a Hardware problem, I know - but I changed the RAM completely, set dowm CPU clock and RAM speed to get more secure timings but the problems remain.
Instability was on Leo 1.5.1, step by step I did system updates now:
- Kalyway 1.5.2 combo
- Vanilla Kernel
- Pro Kit update 4.5
but nothing gets better .. :-(

system works like a charm with other applications !
(o.k. I did no longer FCP tests yet, but it seems to be stable)


setup:

Gigabyte GA-P35-DS4
2 x NVIDEA Geforce NX7600GS silent / passive
NVinject 1.0 (from kaly 1.5.1 DVD, works well on 4 screens)
Leo 1.5.2 with kernel update ans all pro kit updates

RAM:
testet 4 x 1 GB G.SKILL (4.4.4.12 spec) and 2 x 2 GByte OCZ (4.4.4.15 spec) on specifies and save settings.

has anybody a idea whats going wrong ?
can motion be limited in RAM usage somehow ? (there is nothing in the preferences, but maybe there is another way) ?

thanks in advance !

4 gigs of ram is causing it to crash... i had similar problems... some applications would crash OSX during install, some when i run them. i have found a thread that many people have the same problem... After I removed one of 2 2gb ram chips all problems were gone. Haven't crashed since. Don't ask me why it happens. It just does

yes, I did now a mixed config with 1 + 2 = 3 Gigs & it works.
In the installation area they talk about similar problems, it seems to be a bug togheter with the jmicron controller to get more than 3 Gigs.
the G35-DS4 does a kind of pseudo dual channel ("flex mode") to enhance memory performance against the single channel mode.

Problem found. Currently the only way to fix the 3 GByte RAM limit is to remove jmicronata.kext, deactivate the controller in BIOS and only use S-ATA Devices.
The kext can't handle 64bit numbers.

also make sure you update your ICH controler with the latest driver availalble here :

http://forum.insanelymac.com/index.php?showtopic=88335

& don t forget to remove the buggy jmicron ( you won t be able to use ide anymore )

enjoy your 4gb + ram