Процессор 32х битный, но програмное обеспечение amd64 и все работает. Почему?

cat /proc/cpuinfo

processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Celeron(R) CPU 2.80GHz
stepping : 9
microcode : 0x3
cpu MHz : 2813.745
cache size : 256 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl tm2 cid cx16 xtpr lahf_lm
bugs :
bogomips : 5627.49
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:

Процессор 32х битный, но програмное обеспечение amd64 и все работает. Почему?

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
Model name: Intel(R) Celeron(R) CPU 2.80GHz
Stepping: 9
CPU MHz: 2813.745
BogoMIPS: 5627.49
L1d cache: 16K
L2 cache: 256K
NUMA node0 CPU(s): 0

Процессор 32х битный, но програмное обеспечение amd64 и все работает. Почему?

processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Celeron(R) CPU 2.80GHz
stepping : 9
microcode : 0x3
cpu MHz : 2813.745
cache size : 256 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl tm2 cid cx16 xtpr lahf_lm
bugs :
bogomips : 5627.49
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management: