Re: [SOLVED] Is my processor 32-bit or 64-bit?
On 8/21/2012 9:04 PM, Stephen Powell wrote:
> On Tue, 21 Aug 2012 04:18:52 -0400 (EDT), Stan Hoeppner wrote:
>>
>> Yep. CPUID 0F27 makes this CPU a Prestonia Xeon, 130nm, in essence a
>> Northwood P4, the only difference being the model#, CPUID, and branding.
>> Intel introduced EM64T (x86-64) with the 90nm chips.
>>
>> This CPU is 32bit x86 only.
>
> Stan, Stan, the hardware man! I knew you'd know! Where did you find
> the information that correlates CPUIDs with processor characteristics?
Simplicity. Google "CPUID 0F27". First hit is:
http://www.cpu-world.com/sspec/SL/SL6YH.html
That tells us 0F27 is the Northwood core.
> I don't suppose you'd have a URL handy, now would you? Next time, I can
> check myself and not have to bother the list.
Once we have the above info, Wikipedia tells us the Northwood chips were
all 130nm, and that EM64T wasn't introduced until the 90nm series. The
2.4GHz/512KB/400MHz Prestonia CPUID 0F27 was released in April 2002.
Nacona (90nm) with EM64T was introduced over two years later, in June 2004.
--
Stan
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