Problems with M3A32-MVP Deluxe/WiFi-AP

[gev2006]

Hi to all,
this is my configuration :
ASUS M3A32-MVP Deluxe/WiFi-AP
Chipset 790FX/SB600
AMD Phenom 9500 quad-core processor
RAM 4Gb Kingston DDR800
ATI 1950Pro 256Mb
Seagate 250Gb PATA (Leopard)
Maxtor 320Gb SATA2 (Windows)

Installed System:
Leopard 10.5.2 (from Zephyroth)
Kernel 9.2.0
SB600 kext

My problem is that my system freeze everytime I start an application that use a lot of hard disk read/write...
Some example: client torrent, amule, parallels, stuffit...
It doesn't give me a real kernel panic, but freeze only and I can do nothing, only reboot...
I've read that someone has copied some kext from 10.5.1, but it doesn't work for me...
I've tried also to install new AppleVIAATA.kext, IOATAFamily.kext, IONetworkingFamily.kext,
AppleACPIPlatform.kext, AppleSMBIOS.kext and AppleOnboardPCATA.kext, but nothing changes...

Can enyone help me?...
Thanks

PS: Excuse me for my english

[roisoft]

are you using ACHI mode for your HDD?

[bhast2]

i bet his problem is that he has 4 gigs of ram
cut it down to 3 gigs

[roisoft]

maybe ur right, but maybe the problem is in the ethernet or HD controller, you can try this, edit the apple.com.boot.plist and add this line under kernel flags

"maxmem=3072" (without the quotes)

if the system is stable the remap memory option is the problem, this happens with 32 bit systems and 4gb

[bhast2]

what is the command in the term to do this??

edit nevermind found it
sudo -s
(enter your password when prompted)
cd /Library/Preferences/SystemConfiguration
nano com.apple.Boot.plist

[roisoft]

<key>Kernel</key>
<string>mach_kernel</string>
<key>Kernel Flags</key>
<string>maxmem=3072</string

[bhast2]

so this allows 4gigs of ram???

[roisoft]

with this, you are fixing the max memory to 3gb, the system sees 4gb but only uses 3gb

[bhast2]

ok i understand that so doing this is like taking one of the sticks out

[gev2006]

Thank you so much guys...
Bhast2, you win the bet...
The problem was really the 4gb of ram...
The option "maxmem=3072" in com.apple.Boot.plist solved everything...

Thanks

[roisoft]

take a look in your bios if there´s an option for disable/enable memory remap

[gev2006]

Ok, I'll take a look about memory remap in my bios...

Thank you a lot...