This is a known issue for the core implemented in Artix and Kintex devices due to an Intel errata. To work around this issue, please refer to (Xilinx Answer 51135).
An out-of-the-box solution is available to enable customers to run the Kintex-7 FPGA KC705 Base TRD. This involves using a particular set of files (.bit and .mcs file) when running the Base TRD. The files needed, k7_pcie_dma_ddr3_base_x4_gen2.bit and KC705.mcs, can be found at the end of this answer record. Please make your selection based on your software version.
For information on how to run the Kintex-7 FPGA KC705 Base TRD, see the Kintex-7 FPGA Base Targeted Reference Design User Guide (UG882):
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