Reasons for data corruption.

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H

HarshNE

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Sep 29, 2015
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Hello everyone,
I was wondering why my desktop computer (used for few months), downloads or copies large files corrupted.
I have been using an Acer laptop which is about 10 years old but never gave me such corrupted files excuses unless the original source is corrupted.
About my desktop computer- I bought a used tower with following specs-
Intel q9450 @ 2.66ghz
4gb ram (2*2gb sticks from kcomputer bay)
GA-G31M-ES2L motherboard
Hitachi 1tb sata 3gb/s Internal drive
and Gigabyte gt 640 gpu
Now, about my problem-
Recently, I made my android phone go bad that i had to install fresh firmware on it. So for this purpose, I used my desktop pc, downloaded filmware to flash in Odin software, and when i selected firmware in odin, it gave me errors like checksum doesn't match. I downloaded the firmware again, and the same problem happened. Finally, I used my laptop, and everything worked fine.
For this corruption of files, I suspected two components-
1. Hard drive( because it is rated lowest score in windows index(5.9), and it makes loud noises whenever something is read heavily from the drive or written into it.)
2. RAM( because laptop has ecc rams, while my desktop uses unbuffered non-ECC rams)

I would like to mention that i overclocked my cpu once making it reach temperatures more than 95 degrees celcius. But i don't think that cpu could be the problem since it is still working perfectly.I guess it would have stopped working if it received enough damage from high temperatures.

Solution I tried-
I bought new internal hard drive Toshiba 2tb sata 6gb/s, and it is rated 5.9 which is same as the older drive. I can certainly see little performance impovement, and it is definitely quiter than the older one. Now I think that hard disk wasn't the problem.
I don't know if ram could be at fault.

Any suggestions,help or more knowledgeable information is much appreciated.
Thank You in advance, and sorry if i was impolite or if there were grammer mistakes,etc.
 
Solution
smorizio
with memtest if the error is in the same bit/dimm location per the failure info. remove that dimm see if one dimm is fine. if it is swap dimms see if the error follows the dimm or the ram slot.
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use cpu-z to read the ram speed.. see if it rated for the intel g31 chipset. the older chipset had max speed of 800. some of them were less then 800. use intel cpu test program to test your cpu. could be bad cache.
the last is the mb bios and the size of the hard drive. old mb bios max hard drive were 500g at the time or less. newer mb have to be efi bios to use larger hard drive right.
 
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Hi Smorizio, Thanks for your suggestions.

Here is the result that intel cpu test program gave me-
Result- FAIL
Attention- Processor under test is verified as "SAMPLE''

and for that cpu-z program, I do not know where it tells if the ram is rated for intel g31 chipset.
I tried to validate whole system,so you could see it for yourself, but i failed to validate by both online and manual means.
 
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Hi everyone,
In the past few days, I tried to overclock ddr2 800 ram and checked its stability using memtest. I chosed a value which was accepted and computer successfully did POST. Then, I tried memtest, and the first pass completed successfully, but in the second, I got lots of errors starting from the Test#7. So, I lowered the overclock little by little, and tried memtest again and again, getting almost same results. I eventually set default values, and even at 800mhz, memtest finds errors in 2nd pass. Does that mean my ram is not good?
 
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Thanks for the quick reply.
I do not know if memtest was testing ram no. 1 or 2 at the time of errors. I can try testing 1 ram at a time.

Can you also explain me my cpu is o.k. because i do not know if there are any faults in sample cpu. What did the software mean from sample cpu?
 
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So,you basically mean that I do not have to worry about cpu?

Now about RAM testing-
I pulled out one ram stick near to the cpu, then tested the remaining stick on the motherboard and it passed 3 passes without any errors. Thinking the ram and its slot on motherboard is fine, i tested second ram stick. I removed the previous stick and replaced it with the remaining one, and when the first pass completed, memtest found 1 error. Actually, that error was found within 10 minutes of the test. So,now i have 1 defective ram.
Just to test the other slot on the motherboard(near the cpu), I tested working ram the whole night. In the morning, there were 0 errors after 10 passes.

What should I do about the defective ram? it still has a sticker showing lifetime warranty.

Since the defective ram was near the cpu, do you think it was used for all of my operations until i exceed 2gb ram? If yes, should i consider reinstalling my windows O.S., and also copy files again from external hard drive?( personal backup files copied using laptop.)
 
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But, my system can run on 2gb until I buy another stick. Don't you think that I should install windows using it? Because 1 ram stick is faulty,should i assume that cpu, and hard drives are error free, and that whatever checksum errors i got were because of ram? Since we are talking about memory, I tried memtest on my laptop too. Result is - pass 1 without any errors, after running for more than 1:30 hr, laptop shuts off completely. I am guessing it shuts off because ram might be overheating during tests. If you know why it shuts off,please let me know. Thanks
 
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