Re: [exim] Fastest Exim server ever

W B Hacker wrote:
> Marc Perkel wrote:
>
>
>> Yes - we will go wide if need be using multiple servers in parallel.
>> Going to start with an Intel Quad core and 8 gigs of ram.
>>
>
> Only if you buy the top-end Xeon and MB 'glue' that can *use* over 4GB.
> Remember, Intel 'commodity' CPU only have 64-bit *extensions*.
>
> NIC's and storage controllers don't DMA into the voltage regulator
> chipsets - they need RAM and address space.
>
> For affordable Core-2 Quad, calculate as:
>
> (4 GB minus reserves for VGA and bus denizens)
>
> - e.g about 3 1/4 GB with decent VGA, 3 3/4 GB if headless.
>
> Any more RAM wanted, you'll be better off with AMD-64, UltraSparc, HPPA
> (PA-RISC/Itanium), Power5/6, roughly in order of increasing cost.
>
> And it isn't just the architecture - the 'commodity' OS'en most of us
> here use don't all handle the above-4GB RAM as fast as the below-4GB RAM.
>
>

So Bill, are you saying then that I should get an AMD CPU? I personally
run dual core AMD with 8 gigs of ram and the 64 bit version of Fedora
and I can use the full 8 gigs. Are you saying the Intel chips don't do that?