Problems with Large FFT but not Small FFT's?

2006-02-08, 19:34

Hi,

I am running a DC 3.2ghz (940) Intel processor, with a P5WD2 Premium mobo. I have 2 gigs of PQI memory 5400, a Enermax EG651P-VE FM(24P) 550 Power Supply.

When running the small fft's everything is fine. After 30 minutes with a large FFT test, I get a blue screen of death.

I am OC'ing at 251 FSB, memory at 4:3 (180mhz in CPUID). Vcore at 1.325.

Any suggestions on what is making the Large FFT crash?

Cruelty · 2006-02-08, 21:04

Hmmm, let me think... overclocking? Your system is simply not "prime stable"

I would bet on memory + FSB problem here, but I have no real experience with Intel platforms...
BTW: do you run stress test in two instances (on both cores) or just single one? What are your temperatures during stress test?

Prime95 · 2006-02-08, 23:38

Large FFTs stress memory more than small FFTs. Relax your memory timings or slow down the memory bus speed

2006-02-08, 19:34	#1
RichTJ99 2×3³×5×37 Posts	Problems with Large FFT but not Small FFT's? Hi, I am running a DC 3.2ghz (940) Intel processor, with a P5WD2 Premium mobo. I have 2 gigs of PQI memory 5400, a Enermax EG651P-VE FM(24P) 550 Power Supply. When running the small fft's everything is fine. After 30 minutes with a large FFT test, I get a blue screen of death. I am OC'ing at 251 FSB, memory at 4:3 (180mhz in CPUID). Vcore at 1.325. Any suggestions on what is making the Large FFT crash?

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2006-02-08, 21:04	#2
Cruelty May 2005 3130₈ Posts	Hmmm, let me think... overclocking? Your system is simply not "prime stable" I would bet on memory + FSB problem here, but I have no real experience with Intel platforms... BTW: do you run stress test in two instances (on both cores) or just single one? What are your temperatures during stress test?

2006-02-08, 23:38	#3
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 2×53×71 Posts	Large FFTs stress memory more than small FFTs. Relax your memory timings or slow down the memory bus speed