|RAMCHECK LX Testers
RAMCHECK LX DDR2
RAMCHECK LX Base Tester
200-pin DDR2 SO-DIMM
200-pin DDR SO-DIMM
66-pin DDR Chip
Why Test Memory?
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- Q. Why are some known good modules
failing on RAMCHECK?
A. There are several possible reasons. First, your RAMCHECK may need to have
its firmware updated. We recommend updating your RAMCHECK's firmware in these
instances to make sure that your firmware is current before calling for tech
support in order to rule out any support issues that we are aware. Check our
Program Download Site for the latest program
revision. Second, your RAMCHECK may need an Hardware upgrade because the device
you are testing may not be supported with your current hardware. For further
information to determine if your RAMCHECK needs to be upgraded please visit the
RAMCHECK upgrade page. Third, the module itself
is not yet supported by our firmware.
We are constantly developing additional support based on modules sent to us for
evaluation by our customers. Please review the
Test Accuracy and Reliability FAQ
page for further reasons on why this may happen. Please also refer to
Application Note INN-8558-APN5 for
- Q. Why disabling "Full Page
Burst" may cause "failing" modules to pass RAMCHECK
A. The Full Page Burst mode we use for SDRAM modules enables RAMCHECK to
achieve fairly fast test times. However, since Full Page Burst is not a
required feature by the PC-133/100 standards, many memory modules are not
supporting this feature, or have only a partial support. RAMCHECK tries to
assess if the Full Page Burst feature is supported on the tested module. If it
determines that this feature is not supported, RAMCHECK will automatically
disable this feature. However, we have found that some modules "fool"
RAMCHECK to use Full Page Burst, and eventually fail the module. We recommend
that if you encounter modules that fails intermittently in Basic Test, to try
and disable the Page Burst feature manually. This can be done using
Change-on-the-fly or Setup. Motherboards do not use Full Page Burst mode and
therefore, disabling this feature only lengthen some portions of the test.
For further details on the Full Page Burst Mode please review
Application Note 7.
- Q. Why do some modules pass the test
on RAMCHECK and yet fail in the computer?
A. Unfortunately, all memory testers, including those costing $500,000 and
more, cannot achieve exhaustive tests (that is, 100% accuracy) due to the
virtually unlimited possibilities of data combinations which may be stored
inside a memory device. Therefore, while we continuously thrive to improve
RAMCHECK's test algorithms, we cannot guarantee 100% accuracy of the test
results. Try first to verify that you have the latest firmware and that you do
not need an hardware upgrade as discussed above. If the module still passes
RAMCHECK, consider sending it for evaluation. We are continuously improve our
test algorithm based on "strange" modules sent to us by our
customers. Please also review the Test
Accuracy and Reliability FAQ page for more detailed information.
- Q. Why the latest adapter I have just
received is not working with my RAMCHECK?
A. With the rapid development of RAMCHECK firmware and new adapters, your
RAMCHECK may still have an older version of the firmware which does not support
the new adapter. Verify that the program version (seen during power up on the
RAMCHECK display) supports the adapter you are trying to use by reviewing our
RAMCHECK Development Log. ALWAYS MAKE SURE TO
UPGRADE YOUR RAMCHECK VIA THE INTERNET - it is free and easy. Check our
Program Download Site for the latest program
If the program version is correct, there may be a bad contact between the
adapter and the RAMCHECK expansion slot. A simple tech spray solution applied
to the adapter's connector pins will usually eliminate problems that are due to
a bad contact or connection. Sometimes, the adapter you have just received was
developed after your unit was manufactured and since then we have incorporated
some hardware changes in the RAMCHECK. Please review our
Calibration and Upgrade procedure page and
contact our Tech Support.
- Q. Why is the RAMCHECK PC COMMUNICATION
Software not transmitting the firmware to my RAMCHECK?
A. Depending on your computer and/or your Network Configuration it may be
necessary to change the COM port setting in your Windows Platform.
Please refer to this page for further details.
- Q. After various test parameters have
been set, I can no longer use the RAMCHECK without encountering test failures.
How can this be corrected?
A. RAMCHECK uses a nonvolatile EEPROM which stores the setup changes,
therefore, when turning it off then on, the previous setup is restored. If this
causes problems with modules that the setup was not intended for, simply enter
the code sequence F2-F4 from standby mode. This will clear any changes done to
- Q. I have recently purchased a
RAMCHECK Plus tester and I am receiving a "Connector Wiring
A. Confirm that the DDR adapter is properly seated on the RAMCHECK base unit.
Make sure that the RAMCHECK is turn off. Remove the adapter by carefully
lifting the front of the adapter up first, then the back. Next, re-insert the
adapter by aligning it on top of the two gray sockets, noting the pin
orientation. Then carefully put pressure on the front of the adapter until it
is seated all the way. Do the same for the back. Turn the RAMCHECK on. Once the
unit boots up and is flashing DDR 184-PIN DIMM, press F1 with no
memory inserted. You should see No Memory displayed on the LCD. Now
you should be ready to test. Insert a DDR 184-pin module and press F1 to start
the Basic Test.
- Q. Why on some modules I need to re-insert
it 2 or 3 times or lean the module in the test socket for the RAMCHECK to test
A. A worn or dirty test socket or used modules could cause this symptom due to
the contacts between the two. Cleaning the contacts of the test socket may help
if the test socket is not to worn. Use regular isopropyl rubbing alcohol or a
product like Blue Shower, which can be found at most electrical supply houses.
When using rubbing alcohol please use a soft bristle brush small enough to fit
inside the nozzle of the alcohol bottle.
If you remove the adapters often we also recommend running the brush soaked
with alcohol gently along the contacts of the gray socket of the adapter. You
should notice after you do this that the adapters will be easier to remove and
If you still have intermittent test issues, the test socket may be worn and
need to be replaced. Most of the test sockets that the Ramcheck and its
adapters are user replaceable. If you are considering replacing your socket
please contact us to determine if the test socket in question is user
replaceable or not.
If you have additional questions, please feel
free to email us at firstname.lastname@example.org.
Please remember to include your phone and fax numbers.