hello Roland,
could the CPU be overheating? what is the ambient temperature in the
room? have you verified cpu fan and other case fans are operating?
is plenty of hot air exiting the power supply fan? P4 has thermal
protection which will slow selected areas of the chip, whichever
portions are overheating. your bios should be able to tell you cpu
temp although the cpu will have already cooled somewhat if you reboot
and enter bios setup.
you could check windows/hardware menu to see what cpu/clockrate it
identifies.
also there are shareware programs that will probe & benchmark your
pc and report exact cpu type, step number, clock rate, whatever.
and the motherboard probably has a CD rom with some applications
such as a cpu temperature monitor . i'm not sure if this would have
been packaged with your PC or not, but if not, the motherboard maker
probably has the same apps downloadable on their web site.
in my experience, i think a fine P4 cpu temp while running
prime95 would be around 59C.
/eli
>>>>> "Bockhorst," == Bockhorst, Roland P HQISEC <[EMAIL PROTECTED]>
>writes:
Bockhorst,> I think my P4 is running like a P III, at one third
Bockhorst,> speed doing Mersenne Prime testing.
Bockhorst,> When I run Prime95v22 it reports my P4 as .... CPU
Bockhorst,> features: RDTSC, CMOV, PREFETCH, MMX
Bockhorst,> If I change the CPUtype to 12 (P4) and add SSE to the
Bockhorst,> local.ini file, as in ... CPU features: RDTSC, CMOV,
Bockhorst,> PREFETCH, MMX, SSE nothing changes.
Bockhorst,> If I change SSE to SSE2 the system crashes with an
Bockhorst,> illegal instruction message.
Bockhorst,> I am running Prime 95 on a 256 meg. P4-1600 with 8k L1
Bockhorst,> and 256K L2 on Windows 95A
Bockhorst,> I'm entertaining these theories:
Bockhorst,> Windows 95a without drivers? doesn't support a P4. (Is
Bockhorst,> it being asked to?) I don't really have a P4. (I
Bockhorst,> bought this system expecting P4 performance running
Bockhorst,> Prime95) L1 cache too small. L2 cache too small
Bockhorst,> Something else.
Bockhorst,> Comments/theories/assertions/wild hairs are invited.
Bockhorst,> My best times my P4 1600 256 meg 133SDRAM Best time
Bockhorst,> for 256K FFT length: 57.218 ms. Best time for 320K
Bockhorst,> FFT length: 71.299 ms. Best time for 384K FFT length:
Bockhorst,> 86.423 ms. Best time for 448K FFT length: 102.487 ms.
Bockhorst,> Best time for 512K FFT length: 115.680 ms. Best time
Bockhorst,> for 640K FFT length: 148.042 ms. Best time for 768K
Bockhorst,> FFT length: 184.596 ms. Best time for 892K FFT
Bockhorst,> length: 214.233 ms. Best time for 1024K FFT length:
Bockhorst,> 250.226 ms. Best time for 1280K FFT length: 320.198
Bockhorst,> ms. Best time for 1536K FFT length: 386.440 ms. Best
Bockhorst,> time for 1792K FFT length: 467.666 ms.
>> From the Benchmark site
Bockhorst,> P4 1500 133SDRAM 256 Full 0.019 0.024 0.030 0.035
Bockhorst,> 0.040 0.052 0.063 0.079 0.087 0.120 0.154 0.196 19 24
Bockhorst,> 30 35 40 52 63 79 87 120 154 196 Mersenne benchmark
Bockhorst,> times from http://www.mersenne.org\bench.htm
Bockhorst,> P III 1 gig times are below
Bockhorst,> Intel(R) Pentium(R) III processor CPU speed: 996.59
Bockhorst,> MHz CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE L1
Bockhorst,> cache size: 16 KB L2 cache size: 256 KB L1 cache line
Bockhorst,> size: 32 bytes L2 cache line size: 32 bytes TLBS: 64
Bockhorst,> Prime95 version 22.3, RdtscTiming=1 Best time for 256K
Bockhorst,> FFT length: 54.165 ms. Best time for 320K FFT length:
Bockhorst,> 70.726 ms. Best time for 384K FFT length: 84.818 ms.
Bockhorst,> Best time for 448K FFT length: 101.149 ms. Best time
Bockhorst,> for 512K FFT length: 114.412 ms. Best time for 640K
Bockhorst,> FFT length: 148.319 ms. Best time for 768K FFT
Bockhorst,> length: 180.532 ms. Best time for 896K FFT length:
Bockhorst,> 212.317 ms. Best time for 1024K FFT length: 243.061
Bockhorst,> ms. Best time for 1280K FFT length: 315.420 ms. Best
Bockhorst,> time for 1536K FFT length: 377.044 ms. Best time for
Bockhorst,> 1792K FFT length: 448.984 ms.
>>
Bockhorst,>
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