1 error is enough if its not your fault ie voltage, OC etc.
Why did you not continue this in the same thread as last night m8 ?
" In all cases if MemTest finds an error it will stop and report it to you. If you do get an error, you should consider replacing you RAM or at the very least verifying that your machine is correctly configured. Note that even ONE error is a sign of a serious problem - a correctly functioning computer can run MemTest for weeks with no errors.
The most common cause of memory errors is a faulty memory card. Unfortunately, due to variations in motherboards and chipsets, it is impossible to reliably locate the physical chip that is failing purely via software. It is still possible, however, to determine which DIMM is failing if you have more than one, by elimination: Run the machine with one memory board installed at a time; when errors are found the installed board is at fault. This is also a good diagnostic for another reason: sometimes the problem is really with the motherboard, and it will disappear if you have less RAM installed, or if the DIMMs are installed in different slots. If you have access to multiple computers, you can also try testing the "faulty" RAM in both to isolate whether the problem is the memory or some other component.
If you have more than one DIMM and you find errors with both, even when you test them one at a time, this suggests that your RAM is probably OK. Either your motherboard is failing, you are using memory timing settings that are too aggressive, or your RAM is not compatible with your motherboard. You can experiment with memory timing settings in your BIOS, which may allow you to use your ram without errors at a small performance cost. Another thing to check is that you are using the proper voltage setting for your RAM (not all BIOSes let you set this). Please refer to your motherboard manual for information on this topic - HCI Design cannot provide specific recommendations for BIOS settings.
Another potential cause of memory problems is overheating - make sure your machine is well ventilated and try running the test again.
If you have any questions, please take a look at our FAQ page before contacting tech support. "