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.

---

.: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:.

There is an issue with AppleNForceATA and other ATA kexts in that they are written using 32bit addresses. This causes problems with using ~ 3gb - 3.5gb of memory. The fix listed in my signature comes from Slashack. This person modified the kext using 64bit addresses which solved the problem for me. In your case though if its not broken don't fix it.

OSX can run in 64bit mode when this is offered by the processor. It may however cause problems running PPC applications through rossetta. Some applications can take advantage of 64bit but most of the kexts (drivers) out their are not 64bit. OSX 10.6 "snow leopard" should be a big jump in the right direction. I believe we will see 64bit kexts across the board and hopefully more 64bit software support

Im not sure why you are having problems with enabling 64bit with the new kernel.

---

MOBO: Z77MX-QUO-AOS CPU: Core i7 3770K GPU: MSI N760 TF 2GD5/OC Case: Modded MacPro2,1
Memory: 32GB Corsair Vengeance (CMY32GX3M4A1600C9) Wifi: Airport Extreme bcm94321MCA BIOS: HermitCrab Labs H3A.816M
Monitor: AOC Q2963Pm 29" WFHD 2560x1080 21:9
Interests: KDE on Apple Darwin, Keeping it real with the command line, Helping those that help themselves