Poor nvidia performance AMD64X2 4GB RAM - 64 IOMMU to blame ?
athlon X2 4600
motherboard : gigabyte GA-M55S-S3
2 X 2GB ram
nvidia 8500 PCI-E
Distro - ubuntu/opensuse amd64
I have recently upgraded my desktop from 1GB ram to 4GB.
Previous i was getting Aperture beyond 4GB messages, I now get
In dmesg it shows:-
I do not get this in 32bit linux using PAE - i can see all my memory.
After reading around forums I tried iommu=memaper=3 - what excatly does this do ? I noticed that Aperture was set to 256MB with this option - and I lost the 256MB..
What should I set my aperture to ? My gfx card is geforce 8500 256mb PCI-E
I also notice that if I reduce my memory to 2 or 3 GB I do not get that message.
Any sugestions ?
Re: Poor nvidia performance AMD64X2 4GB RAM - 64 IOMMU to blame ?
I have also noticed that setting iommu=memaper=0 only uses 32MB - if this setting is not needed then it should be set to this ?
Is there a way to use all my ram.
Do anyone know what it should be set to.
When using less than 4GB i can see no message regarding Aperture.
Anyone know anything that might help
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