~/> cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Pentium(R) 4 CPU 3.20GHz stepping : 1 cpu MHz : 3200.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 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 lm constant_tsc pebs bts pni dtes64 monitor ds_cpl cid cx16 xtpr bogomips : 6379.72 clflush size : 64 power management : processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 4 model name : Intel(R) Pentium(R) 4 CPU 3.20GHz stepping : 1 cpu MHz : 3200.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 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 lm constant_tsc pebs bts pni dtes64 monitor ds_cpl cid cx16 xtpr bogomips : 6378.58 clflush size : 64 power management :
No. According to Wikipedia, Intel has shipped 5 different cores and over 120 distinct chips under the Pentium 4 brand. Which one do I have? Maybe Intel can tell me.
http://www.intel.com -> Work -> Support & Downloads -> Identify my product -> Identify your Intel Processor -> Intel Processor Identification Utility (Download now) ->looks promising. Unfortunately, the utility that it offers appears to be Windows only (I'm running Linux). However, there is a link from that page to
Processor Spec Finder ->where we can search for processors "by sSpec Number or Product Order Code or Processor Number". The page gives examples of each of those identifiers
sSpec=SL77R Processor Number=E6300 Product Order code=JM80547PH1092MMBut none of those numbers look like anything that I found in /proc/cpuifo.
There is also a drop-down menu on that page
Select a processor family -> Intel Pentium 4 Processors ->which takes us to a page listing 319 different processors (apparently the Wikipedia listing is incomplete).
There are more drop-down menus on that page that let us narrow the search results. From /proc/cpuifo, we know that
CPU Speed -> 3.20 GHz ->and
Cache Size -> 1 MB ->That gets us down to 10 processors. Each entry on the list links to a page giving details about that particular processor. We could go crawling through the 10 links and try to figure out which one we have. However, I can make one more guess to try to narrow the list. The spec sheet for the computer that this chip is in claims that it has a
540=3.2 Prescott socket Tand 540 is one of the entries under the Processor Number menu. Selecting
Processor Number -> 540 ->we get down to 3 chips, listed as
sSpec# CPU Speed Processor # Cores Bus Speed Mfg Tech Stepping Cache Size Package PCG/FMB SL7J7 3.20 GHz 540 1 800 MHz 90 nm D0 1 MB LGA775 04A SL7KL 3.20 GHz 540 1 800 MHz 90 nm D0 1 MB LGA775 04A SL7PX 3.20 GHz 540 1 800 MHz 90 nm E0 1 MB LGA775 04AWhen we click through those three links, we find product pages with tables like
sSpec Number: SL7J7 Package Type: LGA775
CPU Speed: 3.20 GHz Manufacturing Technology: 90 nm
PCG: 04A Core Stepping: D0
Bus Speed: 800 MHz CPUID String: 0F34h
Bus/Core Ratio: 16 Thermal Design Power: 84W
L2 Cache Size: 1 MB Thermal Specification: 67.7C
L2 Cache Speed: 3.2 GHz VID Voltage Range: 1.4V
Box Order Code: BX80547PG3200E OEM Order Code: JM80547PG0881M
This is the information that positively identifies a chip.
Now, which one is ours?
sSpec Number CPUID String SL7F7 0F34h SL7KL 0F34h SL7PX 0F41hNow go back to /proc/cpuifo and look at
cpu family : 15 model : 4 stepping : 1Convert the three numbers to hex
cpu family : 0F model : 4 stepping : 1concatenate them, add a radix tag, et volia we have the CPUID String: 0F41h. So we have the SL7PX.
Between the 'F7 and the 'KL, possibly not. The only clear difference shown on the two product pages is that one has a different OEM Order Code. It may be that they are physically the same part, and are distinguished only for purposes of pricing or distribution.
What about the 'PX? From the three product pages
| sSpec Number | Supported Features |
|---|---|
| SL7F7 |
|
| SL7LK |
|
| SL7PX |
|
EM64T is Intel's trade name for the x86_64 architecture. The 'PX is a 64-bit processor. The other two are 32-bit processors. In case that matters to you.
And close doesn't count. The 'F7, 'LK, and 'PX are all
Pentium 4 3.2 GHz/1 MB 540 socket Tprocessors, but as it happens, two of them are 32-bit processors and one is a 64-bit processor. Unless you can match the CPUID, you really don't have any idea what kind of CPU you have.
The 540 that I got from the computer spec sheet really is the Processor Number. If you enter it in the search box on the Processor Spec Finder page, you get a list of 15 processors that contain the string "540" in their Processor Numbers. From there, it's not too hard to get to the list of three sSpec Numbers shown above, but you still need to visit each product page to find the CPUID number.
A search for 0f41h using Intel's internal web search function returns no matches. A search for 0f41 returns pages for two processors, neither of them the one we want.
A google search on site:intel.com 0f41 returns nothing useful. A google search on site:intel.com 0f41h returns many pages, almost all of them PDFs. One of them even has a table that maps 0f41 to SL7PX, but not in a way that is useful if you don't already know the answer.