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Posted by John-Y on September 14, 2005, 3:59 pm
Please log in for more thread options instabilities (random file corruption, system crashes). Basically memtest would report thousand of errors in a matter of minutes.Turned out the the problem was caused by a faulty Bios setting (memory was set to 'performance mode'. Whatever that means) After setting the value to default, the problem was corrected. But now I'm still getting an error. A single one this time. Happens on test 7 always at the same address (0000006952c). The error occured semi-randomly it seems (but always at the same address) every 2 passes or so on average. So I wonder if this is normal. Is this a sign a defective/"incompatible" Ram? | ||||||||||||||||
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Posted by w_tom on September 14, 2005, 4:48 pm
Please log in for more thread options and your system has crashed. Not only should memory test just fine every time, but it should also test just fine even when heated with a hairdryer on highest setting. If in doubt, then look at the operating temperature from memory datasheets - well above what your hand (or hair) will call comfortable. But a defective memory sometimes may fail Memtst86 (and other memory tests) only when at elevated (and perfectly normal) temperatures. Heat finds weak memory before it causes hard failures later. Unfortunately some never learned this and install more fans to cure a defective semiconductor problem. Pig's Heaven to memory is a temperature at the uppermost and lowermost temperature numbers on that datasheet. Any memory that fails at the 'paradise perfect' temperature of a hairdryer is 100% defective - even if only one memory location fails 1 in 100 tests. Hairdryer tends to find defective (intermittent) memory faster. To work, every essential digital IC in a computer must work correctly every time - which is why we use digital logic and don't use analog logic circuits. In computers, no tolerance for digital logic errors - especially from memory. John-Y wrote: | ||||||||||||||||
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Posted by Alceryes on September 14, 2005, 8:24 pm
Please log in for more thread options > So I wonder if this is normal. Is this a sign a defective/"incompatible"
> Ram? You should receive absolutely NO errors no matter how many passes it makes. It sounds like the RAM might be defective. You might also want to change the BIOS setting from 'default' to custom and manually enter the timings your RAM is rated at. -- "I don't cheat to survive. I cheat to LIVE!!" - Alceryes >I recently used memtest86 after experiencing many serious system
>instabilities (random file corruption, system crashes). Basically memtest >would report thousand of errors in a matter of minutes.Turned out the the >problem was caused by a faulty Bios setting (memory was set to 'performance >mode'. Whatever that means) After setting the value to default, the problem >was corrected. > > But now I'm still getting an error. A single one this time. Happens on > test 7 always at the same address (0000006952c). > The error occured semi-randomly it seems (but always at the same address) > every 2 passes or so on average. > > So I wonder if this is normal. Is this a sign a defective/"incompatible" > Ram? > | ||||||||||||||||
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Posted by John-Y on September 22, 2005, 3:27 pm
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>I recently used memtest86 after experiencing many serious system
>instabilities (random file corruption, system crashes). Basically memtest >would report thousand of errors in a matter of minutes.Turned out the the >problem was caused by a faulty Bios setting (memory was set to 'performance >mode'. Whatever that means) After setting the value to default, the problem >was corrected. > > But now I'm still getting an error. A single one this time. Happens on > test 7 always at the same address (0000006952c). > The error occured semi-randomly it seems (but always at the same address) > every 2 passes or so on average. > > So I wonder if this is normal. Is this a sign a defective/"incompatible" > Ram? > Thanks to Alceryes and w_tom for the informations. I brought the PC to the place from where I got it so they can have a look a it. I explained what's wrong it,the error reported by memtest and everything. Guy said: "all right I'll have a look". Anyway, a week later the guy tells me he fixed the problem, said it was "related to gfx card". Well he fixed it my a**... Problem is still present.(at least he didn't charged me.) But now,I'm observing some other problems...So far, this is what I've seen: -The PC does not always boot. That is, it "powers up" fine but the bios won't execute.So nothing happens.No choice but to turn off and restart. This seem to happen more frequently when the Pc is "cold" (when it's been off for more than an hour iow) -After the above failure to boot, it'll report: "CMOS checksum error.Returning to default". Regardless, after a while the problem will reappear. -Memtest fails the "Memory sizing - Bios All" test (configuration,option3,option2) Reports nothing but errors. -And of course the error reported on test 7 at address 0000006952 like I said above... Does the above shed new lights on what may cause the problem? And no, I haven't changed the Ram module yet...(I kinda hoped the "repair guy" would do so) | ||||||||||||||||
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Posted by John-Y on September 22, 2005, 3:35 pm
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> -The PC does not always boot. That is, it "powers up" fine but the bios
> won't execute.So nothing happens.No choice but to turn off and restart. > This seem to happen more frequently when the Pc is "cold" (when it's been > off for more than an hour iow) > > -After the above failure to boot, it'll report: "CMOS checksum > error.Returning to default". Regardless, after a while the problem will > reappear. > > -Memtest fails the "Memory sizing - Bios All" test > (configuration,option3,option2) Reports nothing but errors. > > -And of course the error reported on test 7 at address 0000006952 like I > said above... Forgot the most important one: -PC crashes randomly.And this under almost any software environments,including during installation of Windows XP,something I've never experienced before. On average,it'll take 15 to 30 minutes to get a crash. | ||||||||||||||||

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> instabilities (random file corruption, system crashes). Basically
> memtest would report thousand of errors in a matter of
> minutes.Turned out the the problem was caused by a faulty Bios
> setting (memory was set to 'performance mode'. Whatever that
> means) After setting the value to default, the problem was
> corrected.
>
> But now I'm still getting an error. A single one this time.
> Happens on test 7 always at the same address (0000006952c).
> The error occured semi-randomly it seems (but always at the
> same address) every 2 passes or so on average.
>
> So I wonder if this is normal. Is this a sign a
> defective/"incompatible" Ram?