Thinkpads Forum

I have a T60 model 2007-72u that when I try to load Win 7 64bit on it tells me that the cpu is not compatilble with a 64bit mode. It is an Intel Centrino Duo T2500. Should this be able to run Win 7 64bit?

Your T60 needs one of the following Core 2 Duo processors to run any 64-bit OS.
T5500/T5600/T7200/T7400/T7600

Then Centrino Duo's are not true dual core processors?

Who told you they were? Only the Core 2 Duos have the 64 bit extensions that allow them to run 64 bit software.

No one told me they were. I assumed since they were dual core processors they should be able to run it. Now I know better. Thanks.

They are dual-core alright. They are just not 64-bit.

Since T60s can only see about 3 GB or so of memory (See the sticky on memory limits for T60s and T61s) there's not much
point in running a 64 bit OS AFIK.

SgtZeke wrote:Then Centrino Duo's are not true dual core processors?

There's a difference between dual-core and 64bit. Your CPU has two cores but is 32 bit only, that's why Windows complains. You would have to upgrade the CPU from a Core Duo that you have to a Core 2 Duo, like T7200 for instance. However, as twillis449 pointed out, you should ask yourself if this is worth it as these CPUs cost a bit and you won't be able to use more than 3GB of RAM anyway (due to a chipset limitation and true for the whole T60/T60p line).

I put Win 7 32 on it with 2 gig of ram and it runs fine. Thanks for all the input.

SgtZeke wrote:Then Centrino Duo's are not true dual core processors?

Centrino is a sticker, not a processor. A laptop with a Centrino Duo sticker can have either a Core Duo or a Core 2 Duo processor, both of which are dual-core, but only the latter is 64-bit.

(The sticker also implies an Intel chipset and an Intel wireless adapter).