definitely i686.

>my cpu says x86 but it's only 32bit

x86_64 is for 64-bit x86 CPUs whereas i686 is for 32-bit x86 CPUs.

>Core2 Duo
AMD64

even my laptop which has pentium core and from 2006 is 64 bit
what shitty laptop did you bought OP

Core 2 duo processors are all 64 bit. You might have a core duo processor, these were 32 bit.

>>55395142
But mine is a core 2 duo.

processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 15
model name    : Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz
stepping    : 11
microcode    : 0xba
cpu MHz        : 800.000
cache size    : 4096 KB
physical id    : 0
siblings    : 2
core id        : 0
cpu cores    : 2
apicid        : 0
initial apicid    : 0
fdiv_bug    : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 10
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 nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority dtherm ida
bugs        :
bogomips    : 4788.35
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 15
model name    : Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz
stepping    : 11
microcode    : 0xba
cpu MHz        : 800.000
cache size    : 4096 KB
physical id    : 0
siblings    : 2
core id        : 1
cpu cores    : 2
apicid        : 1
initial apicid    : 1
fdiv_bug    : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 10
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 nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority dtherm ida
bugs        :
bogomips    : 4788.35
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual
power management:

>>55395523
Then use x86_64, it's not that fucking difficult to understand.

>>55395523
It's a 64-bit processor then.

>>55395536
>>55395548
I guess it is 64bit...

http://ark.intel.com/products/29762/Intel-Core2-Duo-Processor-T7700-4M-Cache-2_40-GHz-800-MHz-FSB

>>55395523
>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 nx lm constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority dtherm ida

que?

>>55395609
>creates a thread because he's a dumbass
>his question is answered multiple times
>still resorts to googling his answer
You're a special kind of retarded, aren't you?

>>55395631
I prefer the term mentally challenged.

>>55395523
T7700's are 64-bit. You can use x86_64 or amd64 packages. (Same thing, but intel call it x86_64, while AMD, who created it, call it amd64)

Trust me, I work at a place that refurbishes obsolete machines for community groups. We only bother with a 64-bit distro these days, and I've done a bunch of Core 2 Duo's in the last few weeks.