Performance

The following table lists DDR3, DDR4, and LPDDR3 speeds.

Table 1. DDR Performance
Memory Type	I/O Type	Speed (-1)	Speed (STD)
DDR3	HSIO	1333	1067
DDR3	GPIO	1067	800
DDR4	HSIO	1600	1333
LPDDR3	HSIO	1333	800

Note: For DDR timing closure, use the SmartTime reports from Libero SoC.

The following table lists DDR3, DDR4, and LPDDR3 throughput.

Table 2. Throughput
Memory	Fabric Interface Frequency (MHz)	Fabric Interface  Data Width	DDR  Memory Data Width	Theoretical Throughput	Actual Throughput		Actual Throughput (%)
Memory	Fabric Interface Frequency (MHz)	Fabric Interface  Data Width	DDR  Memory Data Width	Max Throughput (MB/s)	Write (MB/s)	Read (MB/s)	Write (%)	Read (%)
DDR3	166.66	256	32	5344	4945.19	4987.06	92.5%	93.3%
DDR3 (AXI4)	166.66	256	32	5344	5338.89	4866.08	99.9%	91.2%
DDR4 (NI¹)	200	256	32	6400	5916.5	5866.9	92.4%	91.6%
DDR4 (AXI4)	200	256	32	6400	6395.9	5558.12	99.9%	86.84%
LPDDR3 (NI¹)	166.66	256	32	5344	5034.4	4917.6	94.2%	92%
LPDDR3 (AXI4)	166.66	256	32	5344	5340.59	4681.22	99.9%	87.5%

Notes:

1.NI refers to native interface.
2.To get high DDR4 throughput, set tCCD_L to 4 on the Memory Timing tab of the PF_DDR4 Configurator.