i dont know why it would freeze. I'm not using 64 but kexts or maxmem, but i can use way more than 3gb of ram w/o my computer locking up. I still havent found out why my lockup happend w/ my torrent software.

PS, what is the 64bit kext? Because when I try booting for 64 bit flag w/ amd and new kernel, it wont load my os x.

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.:AMD Machine:.
2.6GHz Quad Phenom 9850.:.Biostar TA790GX.:.8GB DDR2 1066MHz.:.nVidia 8600GT.:.500GB Sata HD.:.Running: LawlessPPc 10.5.4 Update to 10.5.7.:.Voodoo Kernel REV A:.

.:Macbook Pro:.
Intel Core 2 Duo.:.2GB DDR2.:.200GB HD:.