Mac OS X on x86 Hardware 2008–2024 Technical Archive
InfiniteMac OSx86 › Leopard 10.5 › 4GB RAM with AMD
3,882 reads · 2009-01-09 – 2009-01-18
Report Leopard 10.5 Voodoo / XNU Kernel AMD OSx86

4GB RAM with AMD

With the new Voodoo kernel out, is it now possible to run Leopard with 4GB of RAM on an AMD machine? I know there were issues before about this but I would really like to add more RAM if its possible. BTW, I use DDR PC3200 type of RAM so…

Primary Author
@CyCLoBoT Published 2009-01-09
Collection
Leopard 10.5
Archival Footprint
3,882 historical reads · 5 curated field notes (from 10 dispatches) · 2009-01-09 – 2009-01-18
Credited Voices (6)
@CyCLoBoT (4)@eMatoS (2)@Voyn1x@lanceomni@Shadow3k@lateralusman

With the new Voodoo kernel out, is it now possible to run Leopard with 4GB of RAM on an AMD machine? I know there were issues before about this but I would really like to add more RAM if its possible. BTW, I use DDR PC3200 type of RAM so not sure if that makes any difference.

Author Updates & Technical Revisions

Follow-up dispatches by @CyCLoBoT

Author Update #1 @CyCLoBoT 2009-01-09

I have Asus A8N-SLI Premium motherboard. It does have nForce 4 chipset so those drivers should fix the issue right? Also do I need to use all the kexts posted on there? I mean these three:

JMicronATA
AppleVIAATA
AppleNForceATA

Author Update #2 @CyCLoBoT 2009-01-13

So I bought 2GB RAM yesterday and I installed the AppleVIAATA kext from the iPC DVD that is suppose to fix the 4GB RAM issue. Everything was working great at night but today in the morning, my system had crashed.

So now I have also installed the AppleNForce kext early in the morning and will see what happens. Just wanted to post the update just in case if there's something else I need to do which I might have missed.

Author Update #3 @CyCLoBoT 2009-01-13

One other thing I noticed is that 4GB of RAM shows 333MHz speed. I'm not sure if there's any limitation with the A8N-SLI boards that does it. Couldn't find any settings in BIOS to allow me to change it to 400MHz.

Synthesized Community Field Notes

5 technical responses curated from 10 original dispatches

Field Note #1 @Voyn1x 2009-01-09

The 4gb ram problems were caused by the hard disk drivers only supporting 32bit addresses. If you've got a board that uses kexts based on AppleVIAATA like nForce, you'll need to replace your drivers with these ones ↗

Field Note #2 @lanceomni 2009-01-13

The A8N-SLI is uses a nForce chipset so you would need to use the AppleNForceATA kext.

Field Note #3 @Shadow3k 2009-01-13

No problem here.
Leopard 10.5.6, Voodoo kernel , AMD Phenom 9500, K9A2 CF, 4GB DDR2 800.

Field Note #4 @eMatoS 2009-01-13

I have almost the same board (plain A8N-SLI) and it does have the option to set ram bus. I´m working right now but I´ll guide you once I get home.

Field Note #5 @lateralusman 2009-01-18 ↳ Re: @CyCLoBoT
@CyCLoBoTOne other thing I noticed is that 4GB of RAM shows 333MHz speed. I'm not sure if there's any limitation with the A8N-SLI boards that does it. Couldn't find any settings in BIOS to allow me to change it to 400MHz.

Make sure all the ram in your system is the same speed otherwise all the sticks will run at the slowest ram's speed.

Corroborated & Participated: @eMatoS
Sources & Contributor Provenance (6 credited usernames · Thread #1895)
UsernameDossier ContributionDispatchesActive Window
@CyCLoBoTPrimary Author42009-01-09 → 2009-01-13
@eMatoSContributor22009-01-09 → 2009-01-13
@Voyn1xContributor12009-01-09
@lanceomniContributor12009-01-13
@Shadow3kContributor12009-01-13
@lateralusmanContributor12009-01-18