32 bit v.s. 64 bit

how do you know if you have a 32 bit machine v.s. 64 bit machine?

fedora download site excerpt

Quote:

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If you plan to burn CDs, to download the CD images:
For x86-compatible (32-bit):
FC3-i386-disc1.iso (md5sum: db8c7254beeb4f6b891d1ed3f689b412)
FC3-i386-disc2.iso (md5sum: 2c11674cf429fe570445afd9d5ff564e)
FC3-i386-disc3.iso (md5sum: f88f6ab5947ca41f3cf31db04487279b)
FC3-i386-disc4.iso (md5sum: 6331c00aa3e8c088cc365eeb7ef230ea)



For x86_64 (64-bit AMD64, EM64T):
FC3-x86_64-disc1.iso (md5sum: b61b0eb7e0171837aeeff4f0054a4d79)
FC3-x86_64-disc2.iso (md5sum: 99dc12c7e8a93844a48a5675a9c07ec9)
FC3-x86_64-disc3.iso (md5sum: 399b7ffd721ebb4244a02c34cdbb1b82)
FC3-x86_64-disc4.iso (md5sum: f58b1de3b880df55dbbd37d143419226)

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Do you have an AMD Opteron,FX, or 64 series, check [ ]

if yes, then you have a 64 bit processor

P.S. just listing the only mass commercia processor series, I know intel has some.l

If you didn't sell a liver or mortgage your house to buy your computer, then you're running 32bit.

Code:

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#include <stdio.h>
int main(void)
{
    printf("Your computer is %d bit.\n", sizeof(size_t) * 8);

    getchar();
    return 0;
}

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You can get a 64 bit AMD mid-range processor for cheaper than you can a mid-range Intel 32-bit processor.

And by mid-range, I mean 3.4 GHz Intel vs. AMD 3400.

if your already running linux... "uname -p"