- How to update an ordinary DDR2 SDRAM stick to be
compatible with the NVIDIA EPP specification?
The easiest way to do that is to extract EPP profiles from SPD dump of another or
similar RAM stick that features EPP data. So, load the SPD data of your RAM
stick into the Hex Editor by pushing the Read button on the main toolbox.
Now select an appropriate SPD address that corresponds to the memory module to
When the EPPROM data has been read you can update it with EPP profiles. Under the
Update Dump with...
Now choose a desired EPP compliant SPD dump file created by Thaiphoon Burner and
Open button. A new dialog box will appear.
As you probably know, according to the NVIDIA's specification bytes 63h-7Fh are
reserved for the EPP profiles. Therefore, we should overwrite this address range
with the EPP data from the selected dump file. In the
Left-most Hex Value field type 63 and type 7F in the Right-most Hex Value
field. Now press Update.
The green cells represent our integrated EPP profiles. The final step is
reprogramming the memory module with our updated SPD data. Actually, we have to
reprogram bytes 63-7Fh only. Therefore, choose Rewrite Selectively under
EEPROM menu or click on the Write button on the main toolbox and
choose the same command.
The SPD Dump Range window will appear.
Now type 63 in the Left-most Hex Value
field and in the Right-most Hex Value field type 7F. Make sure the SPD
contains the same address value that corresponds to your memory module. Set
Refresh Hex Editor on completion to checked
in order to read the SPD data again after the EEPROM has been reprogrammed. Now
click on the Write
button to begin reprogramming.
As we mentioned before, the described method is the easiest. Another method of
implementation of EPP profiles consists in creating profiles by using EPP
Enhancer of Thaiphoon Burner. Despite it takes more time to integrate profiles
into the SPD it is more preferable when you need to choose a type of EPP
profiles or a number of them. Besides, EPP Enhancer provides more flexible
tweaking for all EPP parameters. We also recommend you to run EPP Enhancer
before reprogramming EEPROM to be sure you have selected a proper SPD dump file
with the suitable EPP profiles for your memory module.