4 Replies Latest reply on Sep 3, 2009 5:49 PM by chaos

    x5540 with 1333Mhz memory


      OK, so we've received some new Workstations that use the x5540 processor and our purchase included 1333Mhz memory. However, after some research it turns out that the 5540 only supports the 10300 memory speeds. Is it possible for us to use the 1333 memory? We will plan on upgrading the processors in the future and were hoping that we could make use of the faster memory speed once the proc. were upgraded. Any thoughts on the possibility of using the 1333 memory with the x5540 processor?

        • 1. Re: x5540 with 1333Mhz memory

          Chaos, you're right about Xeon 5540 only supporting 1066MHz memory. You can still use a 1333MHz memory, but it will run at 1066MHz. If you're using an Intel server board, please make sure you're using tested memory. There are many other factors that affects memory performance, like SR/DR/QR, number of DIMMs, etc. You can use the Memory Configuration tool to determine your memory configuration.

          • 2. Re: x5540 with 1333Mhz memory

            Yes, you should be able to populate your system with 1333 MHz memory with the E5540 CPU, but the max speed the memory will actually operate is 1066 MHz.  Then if you choose to populate with a X5550 or above at a later time, then the system memory should then operate at 1333 MHz.


            Don't forget to check what memory types your vendor supports for your particular systems.


            Hope this helps...Ed

            • 3. Re: x5540 with 1333Mhz memory

              Thanks for the response guys. It turns out that this particular processor requires Registered ECC RAM. The memory that we received was unbuffered, so that would be the big show stopper. Guess we'll be sending back for the registered RAM type.

              • 4. Re: x5540 with 1333Mhz memory

                Chaos, the CPU DOES support both Registered and Unbuffered DIMM, but you can't mix RDIMM and UDIMM in the same system. RDIMM is only required when you need to use a DIMM > 4GB size, because Registered DIMM can provide larger capacity. Which server board are you using? You may want to check if there is any special requirements for your server board...