ram

Again, what do you mean by "reliable"?

Why do you fear that it might be unreliable?

Have you done any research into the standard techniques of doing this sort of thing - including Banking (or "Paging") and "Virtual Memory"...?

Again, what do you mean by "reliable"?

Why do you fear that it might be unreliable?

Have you done any research into the standard techniques of doing this sort of thing - including Banking (or "Paging") and "Virtual Memory"...?

Maybe the OP has 163840 old 32K*8 SRAM chips kicking about.

No problem with nasty DDR timing there.

"Maybe the OP has 163840 old 32K*8 SRAM chips kicking about."

Sounds like an interesting way of heating a house. Too bad the reliability of so many chips would be quite bad, unless some more chips are added and everything connected to get ECC protection.