I am still waiting to meet with our Electrical Engineer, but I found some thermal testing documents in the process.
At one point we published a white paper on the DDR timings. This article is mostly focused on the low-temerature extreme, but it describes the DDR timings which have been tested at both extremes.
http://support.logicpd.co...rtalid=0&EntryId=963 You'll need to be logged into our system to download the file.
These timings came from TI, but tested by Logic PD.
Whenever we see strange behavior I like to look at the timings to make sure everything is operating within normal specs. Since I don't know when your configuration was first setup, I want to have you check the timings with this document and comare the DDR timings.
For the purposes of the above testing, several devices were placed into a temperature chamber and:
allowed to soak, unpowered, at their end temperatures for approximately one hour before testing. When the soaking was complete, the assemblies were powered up. Power to the assemblies was cycled by plugging in and then unplugging their respective AC plugs. This method allowed power cycling without opening the thermal chamber to toggle the baseboard power switches.[\i]
adam