macbrush Posted December 12, 2007 Share Posted December 12, 2007 I have 4GB installed, so I thought i better turned on S/W memory hole. After that my system become very unstable, freezes at random, so I began investigate. The problem is that if I have S/W memory hole turned on, whenever the OS access near 4GB region, it freezes up. Then I use memtest to test out the system. With memory hole enabled, I get all sorts of errors after 4076MB, but testing individual piece of RAM proved they're good, testing individual slot, and they're also good. Another problem is that if I disabled memory hole, forcedeth.kext refuses to load, so I have to give up 1000Base/T, and go back to the good old 3Com 3c905C. Is there a way for OS X to see 4GB without turning on memory hole? Is it a known problem with nForce3 Ultra mobo? Any suggestions? Mobo: nForce3 Ultra 250 CPU: Athlon64 X2 4200+ RAM: 4 X 1GB DDR4200 OS: Tubgirl 10.4.10 with ToH kernel Thank you for any ideas in advance. Link to comment https://www.insanelymac.com/forum/topic/75943-nforce3-ultra-mobo-memory-hole-problem/ Share on other sites More sharing options...
macbrush Posted December 13, 2007 Author Share Posted December 13, 2007 BTW, is there a kernel boot option that could limit the memory the kernel could access? Something like mem=3900MB? Thanks Link to comment https://www.insanelymac.com/forum/topic/75943-nforce3-ultra-mobo-memory-hole-problem/#findComment-536934 Share on other sites More sharing options...
Recommended Posts