thissideup Posted July 8, 2014 Share Posted July 8, 2014 Since we had to replace memory in one of our Optiplex 780 MT towers, we ordered the same Corsair Memory blocks we had to replace the old ones. However, after putting them in, we were hitting a Memory recognition problem. 1.3.2 beeps. Curiously enough, it turns out that the RAM we received have the Version 2.21 while the older RAM have Version 3.19. The memory in question is CMX16GX3M4A1333C9. As I've said, the memory is exactly the same, apart from their version. We tried unsuccessfully on different Optiplex 780 MT towers, all upgraded to the latest BIOS (A15). Could it really be that the ver2.21 ones are not supported on our machines? thanks! alex. Link to comment Share on other sites More sharing options...
LangZone Posted July 8, 2014 Share Posted July 8, 2014 As per : http://www.dell.com/downloads/global/products/optix/en/optiplex_780_tech_guidebook_en.pdf The max memory the 780 MT board supports is 8GB with 4X2GB Modules at 1066mhz. CMX16GX3M4A1333C9 is 16GB at 1333mhz. So maybe try dropping it down to 1066mhz and removing half the sticks and if that fails get the recommend spec ram. Link to comment Share on other sites More sharing options...
thissideup Posted July 8, 2014 Author Share Posted July 8, 2014 As I've said, we simply tried to replace the existing but now broken down memory with the exact same model. We did have 16GB of memory running in the one tower and all of our other optiplex 780 mt towers are currently running with 4x4GB of that exact memory model installed. Also, as per http://www2.corsair.com/configurator/new_configurator_corsair_custom.aspx?sc=&id=6002755 the optiplex 780 mt is configured to run with 16GB, although it states that it could handle the recommended memory, which runs at 1600 Mhz. As I've said, the memory in question is the exact model apart from the inferior version number. Hence the question, could that lead to the problem? Also we've checked after I posted, and it turns out that the old memory (ver3.19) is running at 1066Mhz in linux. Could it be that the non-working memory (ver2.21) is not able to clock down, but the ver3.19 is (assuming of course that the tower indeed cannot handle 1333Mhz)? alex. Link to comment Share on other sites More sharing options...
LangZone Posted July 8, 2014 Share Posted July 8, 2014 That's possible. Will it let you set it to 1066 in the bios? Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.