32bit or 64bit MBP ?

[/dev/toaster]

I am having trouble finding a clear answer to this silly question. Are all Macbook Pros 64bit ? Even those Core Duos that were first released ? Are there any Macbook Pros that are 32bit ?

 

[amusiccale]

To my knowledge, the 'Core 2 Duo' processors are 64-bit capable while the 'Core Duo' [Yonah] processors are 32-bit.

 

[Techguy172]

Yes, the Core 2 Duo is 64-bit meaning it can address 64-bits of memory.

 

[Matek]

MBP models were updated to 64-bit Core 2 Duo models on October 24th, 2006. Before that date all models used Core Duo chips that were 32-bit.

 

[kaiwai]

Yes, the Core 2 Duo is 64-bit meaning it can address 64-bits of memory.

More correctly, you need to have a computer with the chipset to hold more than 2gig or otherwise it'll only detect and use 3gig. In other words, SantaRosa + Core 2 = teh 64bit happy

 

[lavrishevo]

All MBP use 64 bit CPU's even the core duo's. The update was to the motherboard (Santa Rosa). Though if you look at the benchmarks the update was not impressive at all. The speed increase in many processing benchmarks on a system that was 32 bit motherboard compared to 64 bit motherboard were like 1 second in speed increase over the 32 bit. Kind of sad.

 

[flopticalcube]

Core Duo = 32 bit internal
Core 2 Duo - 64 bit internal

http://en.wikipedia.org/wiki/Intel_Core

In short, the Core brand refers to processors with the "mobile" derivative of 32-bit Intel P6 microarchitecture (preceding the Core microarchitecture), whereas the Intel Core 2 Duo brand refers to CPUs with the 64-bit Core microarchitecture.

 

[Andrmgic]

64bit is mostly useless unless you

a) need a lot of ram (4+ GB)
b) have computationally intensive programs that were coded for a 64bit OS

 

[bmcgrath]

All MBP use 64 bit CPU's even the core duo's. The update was to the motherboard (Santa Rosa). Though if you look at the benchmarks the update was not impressive at all. The speed increase in many processing benchmarks on a system that was 32 bit motherboard compared to 64 bit motherboard were like 1 second in speed increase over the 32 bit. Kind of sad.

Core Duo is not 64bit...