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I think I have a bad part am I right here?


B00ne

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Hallo I think I have a bad part: Memory: Corsair Twinx512 XMS3200XL 2x256MB

 

The memory is not failing memtest86+ (at least not for about 8hrs). However my computer is failing Prime95 after 8-12 hrs (time to error varied). Everything is on default settings. For some reason the memory does not default to 2-2-2-5-1T as specified by Corsair but to 2-3-2-5-1t so I changed that one 3 to be 2 cyles - 2-2-2-5-1T)

 

Now to isolate the problem I reduced the memory frequency down to 166 MHz. As a Result I am not getting errors in Prime95 anymore (at least not for about 14-15 - I stopped after that). To further confirm that it is the memory, I increased my HTT to 223 Mhz and reduced my Memory further to 150 (effectively Memory is running at 167.5 Mhz) So far (ca. 11 hrs) I did not get errors - I will check soon if it is still running (17hrs then)

 

edit: Yeah 17hrs still working at overclocked CPU but underclocked memory. Dunno if it is important but Vdram is set to 2.5 but it reads 2.64 (if put to 2.6 it reads 2.73).

 

So I think it has to be the memory.

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Can you tell me the make and model of MB you have along with the CPU speed and it’s FSB as well? In addition, please tell me the bios settings you have set for both CPU and memory and any performance settings that you may have set?
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Thanx for the reply

 

I have DFI Lanparty UT NF4 Ultra-D, A64 3000+ (90nm) (200MHzx9)

Everything is pretty much default (Auto). I only changed the RAS to CAS from 3 to 2 because for some reason the mem defaultet to 2-3-2-5-1T instead of the promised 2-2-2-5-1T :)

I dont know what the default Dram voltage is but I set it to 2.5 (min) because the Bios is showing the voltage with 2.64 @ 2.5V and with about 2.7x @the 2.6V setting.

 

BIOS is still original and I basically do not have any Problems. Just that the system is producing errors in Prime 95 (after 8-12 hrs) if the mem is set to 200MHz.

 

Like I said: I lowered the Mem frequency to 166 and Prime didnt produce errors anymore. And again, to confirm that the mem is being the reason for the errors , I reduced the mem Frequency further (150MHz) but raised the CPU to 2GHz (HTT@223) instead. I ran Prime again and it didnt produce any errors (I stopped it after 22.5 hrs)

 

I hope that helps

 

PS I populated the orange dimm slots (2/4 I believe) as suggested by DFI (Anand)

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Ok, But the original BIOS is the latest BIOS. All the others out there are beta - and I dont even know if they are from DFI. So i am kind of reluctant to try them. After all this is the BIOS not just some driver. Maybe I shouldnt worry too much...
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I would contact the MB maler and get the latest beta bios and then you would need to set the memory Voltage to 2.75 Volts Minimum so I would suggest 2.8 Volts and then test the modules one at a time with http://www.memtest.org.

 

I did as you suggested, Now I am getting the prime arrors afet 1-2 minutes abd SuperPi errors.

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