For Versions Earlier than 14.0, Problems May Occur With DDR3 LRDIMM Interfaces on Stratix V Devices - For Versions Earlier than 14.0, Problems May Occur With DDR3 LRDIMM Interfaces on Stratix V Devices Description This problem affects products on Stratix V devices, targeting DDR3 LRDIMMs, with versions of the Quartus II software earlier than 14.0. DDR3 LRDIMM interfaces on Stratix V devices may not reliably operate at frequencies above 533 MHz. Also, if you are using half-rate mode or are targeting a multi-slot LRDIMM configuration, a patch is required to ensure proper assertion of ODT. Resolution The workaround for these issue is as follows: For DDR3 LRDIMM interfaces on Stratix V devices, install version 14.0 or later of the Quartus II software to ensure reliable interface operation at frequencies above 533 MHz. For DDR3 LRDIMM interfaces on Stratix V devices using half-rate mode or targeting a multi-slot LRDIMM configuration, contact Altera for a patch to modify the assertion of ODT for multi-DIMM topologies and half-rate modes. These issues are fixed in a future version. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 13.1.2 ['Stratix® V FPGAs'] ['novalue'] ['novalue'] ['novalue']