Re: [SOLVED] Is my processor 32-bit or 64-bit?
On Wed, 22 Aug 2012 04:41:26 -0400 (EDT), Stan Hoeppner wrote:
> On 8/21/2012 9:04 PM, Stephen Powell wrote:
>>
>> 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.
Hmm. Well, it appears that CPUIDs are not unique. I've done some more
research, and it appears that CPUID is just one more piece of evidence,
which must be considered along with all the other known characteristics,
in order to figure out what one has. One other piece of evidence that I
needed, but did not tell the list, is that the chipset is the Intel 7500
chipset, which means that the effective bus speed is 400 MHz. (The actual
bus speed is 100 MHz, but the processor operates at Quad bus speed, making
the effective bus speed 400 MHz.) The CPU World web site which you pointed
me to was very helpful though. After some more research, I believe that
this is the right web page (watch out for a wrapped URL):
http://www.cpu-world.com/CPUs/Xeon/Intel-Xeon%202.4%20GHz%20-%20RN80532KC056512%20%28BX80532KC2400D%20-%20BX80532KC2400DU%29.html
The CPUID of 0F27h means that the S-spec number is either QML8,
SL6EP, or SL6K2. QML8 is unlikely, since this is a Quality Sample.
The bottom line: it is most definitely a 32-bit CPU. It does have
2 hyperthreads; so a Linux kernel with SMP enabled will see 2 logical
processors.
Now, my next step is to figure out what memory SIMMs to order.
I'd like to install four 1G SIMMs, if they exist for this motherboard.
But the devil is in the details.
During POST, when the RAM is being tested, the following appears on
the screen:
SE7500CW20.86B.0034.P17.0522031027
Maybe that means something to you?
--
.''`. Stephen Powell
: :' :
`. `'`
`-
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