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40

I installed a 64-bit OS in a 32-bit processor

rated 0 times [ 40] [ 0] / answers: 1 / hits: 41346 / 2 Years ago, sat, february 19, 2022, 8:23:49

As the title suggest, I accidentally installed 64-bit Ubuntu 13.04 in a 32-bit processor, and it is working fine for now (actually I feel my PC became more responsive). Will there be any problem in the near future though? I think my Motherboard is a 64-bit but I'm not certain, but my processor is a 32-bit. Further, I did lscpu and I got this:

Architecture:          x86_64

CPU op-mode(s):        32-bit, 64-bit

Byte Order:            Little Endian

CPU(s):                1

On-line CPU(s) list:   0

Thread(s) per core:    1

Core(s) per socket:    1

Socket(s):             1

NUMA node(s):          1

Vendor ID:             GenuineIntel

CPU family:            15

Model:                 4

Stepping:              9

CPU MHz:               2659.023

BogoMIPS:              5318.04

L1d cache:             16K

L2 cache:              1024K

NUMA node0 CPU(s):     0

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ticrew

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3 Years ago

answered 2 Years ago restlerfin · Accepted Answer

If you installed a 64-bit OS your CPU is necessarily 64-bit capable. In a 32-bit only processor the 64-bit installer not even starts.

In lscpu output CPU op-mode(s):32-bit, 64-bit means your CPU is both 32-bit and 64-bit capable. Architecture: x86_64 is the current kernel architecture (64-bit).

You can also check 64-bit support running:

grep " lm " /proc/cpuinfo

If it outputs nothing you have a 32-bit CPU. If it outputs something like flags : blah blah lm blah blah blah your CPU supports Long Mode (AKA 64-bit).