All of the channels have to match, so 6 2GB dimms and 2 16GB DIMMs will not work, it would have to be 6 of each. What processor model is in the system? ftp.dell.com/.../poweredge-r710_Owner%27s%20Manual_en-us.pdf page 130 shows the memory configuration guidelines.

You can try resetting the motherboard to default to see if it detects the proper memory speed. Page 178 of the manual, switch the nvram clear jumper, turn the system on, then turn it off and switch it back.

The server came originally with a 12GB RAM configuration of 6 modules, 2GB each; 3 modules for A DIMMs and 3 modules for B DIMMs.

Is there any chance to put them together with the new 16GB modules for a final 44GB RAM configuration?

There are two 16GB modules installed on DIMM A1 and DIMM B1 each. And I see that Memory Speed is 1066MHz on the System Startup screen and in the Memory Information inside the BIOS.

It also shows 1066MHz using just one module on either DIMMs.

Hi Roberto Lopez,

How many DIMMs are in the system? It supports 1333Mhz with one or two DIMMs per channel. Where are you seeing that the memory is only running at 1066Mhz?

What model processor is in the system?

If that processor doesn't support 1333MHz, why the original factory configuration came with 1333MHz RAM memory modules??? That's absurd!

I switched the nvram clear jumper, followed the instructions in the manual but it's like if I did nothing. Still shows just 1066MHz instead of the real 1333MHz memory speed.

But I don't think it has something to do with the processor. Because it would make no sense to have 1333MHz memory modules that won't work with that processor, like the original factory configuration. I'm just trying to upgrade RAM memory so we bought the exact equivalent, but 16GB so I can have 32GB total RAM memory instead of just the original 12GB RAM.

Intel Xeon E5530

That system had the option of a large number of processors, some which supported 1333Mhz and some that did not. Depending on when the server was purchased there may have been options for 1066Mhz memory of 1333Mhz or 1333 was the only option because 1066Mhz memory was not available anymore. If you put the original memory in the system does it show 1333Mhz or does it show 1066? 1333Mhz memory will run fine at 1066Mhz.

The original memory is 1333MHz but the system shows just 1066MHz. I know that 1333MHz memory will do fine at 1066MHz, but that's not its full capability. Now I see it's because of the processor model. Thank you very much.