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DDR3 speed in example
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You can clock the DDR3 faster if your application needs it. However, when you generate the memory controller block with a frequency higher than 325MHz, you get the warning "To achieve optimum resource utilization, maintain default clock period given by the tool or a value greater than the default clock period. Please contact Xilinx Technical Support for further information."

According to https://www.xilinx.com/support/answers/69313.html by going with 325MHz instead of 400MHz, you save about 30% of the LUTs.

For most applications, this is a valid trade-off. If you need the extra speed and don't mind the extra resource usage, you can generate the MIG core to run at 400MHz.
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Messages In This Thread
DDR3 speed in example - by LMN128 - 11-05-2020, 07:42 PM
RE: DDR3 speed in example - by alchitry - 11-09-2020, 05:34 PM
RE: DDR3 speed in example - by LMN128 - 11-10-2020, 02:47 PM
RE: DDR3 speed in example - by alchitry - 07-22-2021, 02:31 PM

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