Christian Nygaard wrote:
I'm planning for new Centos 4 computers using the 64bit distribution
and is wondering
if there is a difference on how much RAM memory you should use on a
32bit versus
64bit operating system?
Yes. Several low-limits are higher on 64-bit than on 32-bit, like minimum for
Gnome install is 128MB on 32-bit and 256MB on 64-bit. I assume you would have
more memory than that anyway. 64-bit will use more memory, how much depends. If
you add 20% to what you need on 32-bit you should generally be safe. What kind
of system are you considering 64-bit on?
Feizhou wrote:
there is no difference in how much RAM memory you should use but if you
are going to get a box with more than 1GB of RAM (I think it is 1G...)
using AMD's (note Intel: EMT64 cpus don't count) cpus will give you
better memory performance.
You really like broad, general statements with your personal opinion, right? :)
AMD's on-chip memory controller gives it lower latency, no matter how much
memory you have installed. Memory DIMM mix for Dual Channel can give bandwidht
improvements, but both for Intel and AMD architectures. Yes, there are minute
differences in how EMT64 and AMD64 chips handles page tables and addressable
memory but for all practical intents and purposes they are the same.
--
//Morten Torstensen
//Email: morten@xxxxxxxxxxx
//IM: Cartoon@xxxxxxxxx morten.torstensen@xxxxxxxxx
And if it turns out that there is a God, I don't believe that he is evil.
The worst that can be said is that he's an underachiever.
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