|I ran Memtest v 3.4 for 20 pass[es] and it didn't find any errors.
| floalma
|
Testing RAM often requires a great deal more patience than that.
Try it overnight while you are sleeping.
If you don't have air conditioning
or do have a shed or room that can be isolated and opened to the air,
the best time to test could be during the day's peak temperatures.

This, however, will NOT tell you much that you don't ALREADY know.
There is only **one** source of "parity error":  Your RAM **is** defective.

|Do you think it could be due to dust in the computer,
|on Ram memory or everything else ?
|
I don't see how dust could be the problem;
just heed the STATIC ELECTRICITY part of that page.
I doubt it is a poorly-seated module / flakey connection either.
You could try those; it won't cost you anything.  FIRST,
make sure you understand the STATIC ELECTRICITY caveats to which I linked.

As stated, the evidence says that you have a defective RAM module
that must be replaced.

As stated, the problem is relatively high in the memory address space.
You haven't stated the *amount* of RAM you have,
but, if it is spread over _multiple_ sets of SIMMs,
you could change things (probably for the WORSE)
by rearranging the existing devices.

|What do you suggest then ?
|
As stated:
||What you have is a HARDWARE problem (Bad RAM).
||No amount of further SOFTWARE finageling will get you closer to a solution.

In the end, something needs to be *purchased* and installed as a replacement.
As stated, good RAM vendors will accept the Make/Model data from your computer 
and deliver a corresponding part number of what you can purchase from them.

This is an excellent opportunity to "max out" the RAM that your computer can use.
There is NOTHING that is more cost-effective to improve its performance.

You may also be able to *recycle* your old, defective RAM thru a specialty service
**IF** they know the nature of its problem when they start to harvest the chips
in an effort to put them on a new (larger-capacity) SIMM card.
I suspect these folks can also simply *repair* the bad SIMM
(though how they can make a profit doing this I don't know).

Note: I haven't had dealings with any of these folks,
but I have second-hand stories that they exist.

All told, unless you can find a source of free compatible SIMMs,
there is no way you are getting past this without spending money.

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