amd64 slower than i386 on identical AMD 64 system?

[Martin Nilsson]

JoaoBR wrote:
> with 2GB no problem, 
>  3GB I do not know but 4GB is when the problem appears here for me
> 
> 
>> Wonder if there is some sort of memory pairing issue. To get >2GB and
>> <4GB I'd think you have to have 2 1GB sticks and 2 512MB sticks or
>> something like that.
> 
> no it isn't in my case, I use real good dual-channel 2x (2x1GB)  suggested 
> memory listed in the MB manual

With 4GB memory you will likely get some memory remapped above 4GB, 
could your problems be caused by a buggy driver that doesn't support 
memory over the 4GB barrier correctly? (The ata driver comes to mind)

/Martin