Intel 64bit / AMD 64 bit advantage

Martin Miedema martin.miedema at
Mon Aug 28 08:00:43 UTC 2006

ke han wrote:
> On Aug 28, 2006, at 4:03 AM, Wojciech Puchar wrote:
>>> 32 vs 64 bits does not give you any raw performance boost for most 
>>> apps.  The
>> yes it will. FreeBSD/amd64 works at least 10% faster than 
>> FreeBSD/i386 on athlon64 machine, when i386 version were recompiled 
>> for P4. With default FreeBSD/i386 - it will be at least 30%.
>> just because it's not just 64-bit addresses, but twice the registers 
>> (r8-r15) allowing C compiler to generate more efficient code.
>> For now AMD64 is the fastest and cheapest architecture - at least 
>> with AMD processors, not intel clones. (YES now intel makes clones of 
>> AMD processors)
> I stand corrected ;-)...This is good info, thanks.
> However, to the original post, you will not see 10-30 % performance 
> difference on your email or file sharing between an Intel Celeron and 
> AMD Opteron.   These types of  apps are Disk and Network IO bound.  
> Spend your money on redundancy/fail-over of hard drive and power 
> supply.  Also choosing a well regarded NIC is important.
> ke han
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Thanks a million for this info, this saved he good bunch of money, which
I can use better some were else :)

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