MiSTer FPGA Forum

Hello!

It seems all the 128MB SDRAM boards is made of AS4C32M16SB chips.

But what if we try AS4C32M16SC?
These have even lower operating current - 60ma only, vs 110ma for AS4C32M16SB.
Not sure if they differs in any other way.

Will it be good idea to try?

Regards,
Vlad.

Max clock on those is 133 MHz

No need for more.
Many sdram boards based on 166MHz AS4C32M16SB-6TIN can't go much higher, actually.

It's been a long time since I've seen the relevant math, but as far as I know the delay imposed by the board and connectors is relatively constant in this frequency range. So with 133 MHz chips I would not expect it to be stable at much more than 110 MHz.

Okay, i see, thank you.

But it seems that no one tried these new chips in practice?