2 Replies Latest reply: Aug 19, 2010 12:12 PM by rwernst RSS

Pentium 4 not running full speed, cpu or motherboard issue?

rwernst Community Member
Currently Being Moderated

I have an old system that I've just noticed isn't running the cpu at the speed it was designed.


CPU is a Pentium 4, 2.4GHz, and identified as such with the Intel cpu id program with following details:


Intel(R) Processor Identification Utility
Version: 4.22.20100224
Time Stamp: 2010/08/12 23:54:03
Operating System: 5.1-2600-Service Pack 3
Number of processors in system: 1
Current processor: #1
Active cores per processor: 1
Disabled cores per processor: 0
Processor Name: Intel(R) Pentium(R) 4 CPU 2.40B GHz
Type: 0
Family: F
Model: 2
Stepping: 7
Revision: 37
Maximum CPUID Level: 2
L1 Trace Cache: 12 Kµops
L1 Data Cache: 8 KB
L2 Cache: 512 KB
Packaging: FC-PGA2
Enhanced Intel SpeedStep(R) Technology: No
MMX(TM): Yes
Intel(R) SSE: Yes
Intel(R) SSE2: Yes
Intel(R) SSE3: No
Intel(R) SSE4: No
Enhanced Halt State: No
Execute Disable Bit: No
Intel(R) Hyper-Threading Technology: No
Intel(R) 64 Architecture: No
Intel(R) Virtualization Technology: No
Expected Processor Frequency: 2.40 GHz
Reported Processor Frequency: 1.80 GHz
Expected System Bus Frequency: 533 MHz
Reported System Bus Frequency: 400 MHz


Note that the expected FSB is 533, but it's running at 400, and this is apparently the reason it's running at 1.8GHz vs. the rated 2.4.


Motherboard is an ECS P4VXASD2+


BIOS is latest available for it, and while I've had this since new, never actually noticed or checked to see if it ever ran at 2.4GHz, I suspect not.


BIOS shows it running with 400MHz FSB, but it also says the cpu is Frequency LOCKED, so cannot change the FSB setting to 533, even though all the specs say the motherboard supports 533.


Question is, is this a CPU issue (locked at 400MHz FSB?), or a motherboard issue mis-recognizing the cpu as being locked and set to run at 400MHz instead of 533?


Thanks for any tips.



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