Solved: 4 slots of DDR3 SODIMM modules

goychman · ‎12-27-2018

Is it possible to connect 4 SoDIMM slots to a Kintex7 FPGA, to a single DDR (MIG 7) controller? And if so, how?

ryana · ‎01-04-2019

I'll follow up and suggest moving on to an UltraScale based design since DDR4 supports much higher densities where even 128GB is possible for a single RDIMM. For 7-Series you would have to use two controllers with dual slot 16GB SODIMMs to achieve this density. Maybe there's a way to split the traffic/buffers between two cores?

Don’t forget to reply, kudo, and accept as solution.
PG150 - UltraScale Memory Product Guide
UG583 - UltraScale Architecture PCB Design User Guide
UG586 - 7 Series FPGAs Memory Interface Solution User Guide
DDR3 and DDR4 Memory Interface Calibration and Hardware Debug Guide

View solution in original post

goychman · ‎12-27-2018

I need 64G memory (4*16G) to be connected to the FPGA for a new project :)

ryana · ‎01-02-2019

Hello @goychman,

Unfortunately this is not possible. The IP only supports dual slot configurations.

Don’t forget to reply, kudo, and accept as solution.
PG150 - UltraScale Memory Product Guide
UG583 - UltraScale Architecture PCB Design User Guide
UG586 - 7 Series FPGAs Memory Interface Solution User Guide
DDR3 and DDR4 Memory Interface Calibration and Hardware Debug Guide

ryana · ‎01-04-2019

Hello @goychman,

I'll follow up and suggest moving on to an UltraScale based design since DDR4 supports much higher densities where even 128GB is possible for a single RDIMM. For 7-Series you would have to use two controllers with dual slot 16GB SODIMMs to achieve this density. Maybe there's a way to split the traffic/buffers between two cores?

Don’t forget to reply, kudo, and accept as solution.
PG150 - UltraScale Memory Product Guide
UG583 - UltraScale Architecture PCB Design User Guide
UG586 - 7 Series FPGAs Memory Interface Solution User Guide
DDR3 and DDR4 Memory Interface Calibration and Hardware Debug Guide

View solution in original post