maxtherabbit wrote on 2021-06-12, 02:43:

rmay635703 wrote on 2021-06-12, 02:07:

I can clearly show you many period advertisements advertising 0 wait states
45-56ns system memory in their mid-range to upper range offerings with all sorts of cpus.

Can you, please? Because I certainly have seen them for up to 20MHz processor clocks, but not beyond

Neither have I. Nor have I seen any evidence that 50ns or faster 30pin SIMMs were ever available commercially. There may have been hand picked modules for bespoke systems but not that you or I could walk into a store or buy mail-order.

megatron-uk wrote on 2021-06-12, 07:56:

maxtherabbit wrote on 2021-06-12, 02:43:

rmay635703 wrote on 2021-06-12, 02:07:

I can clearly show you many period advertisements advertising 0 wait states
45-56ns system memory in their mid-range to upper range offerings with all sorts of cpus.

Can you, please? Because I certainly have seen them for up to 20MHz processor clocks, but not beyond

Neither have I. Nor have I seen any evidence that 50ns or faster 30pin SIMMs were ever available commercially. There may have been hand picked modules for bespoke systems but not that you or I could walk into a store or buy mail-order.

I don’t want to waste too much time but looking at the first 1991 magazine scan looky what I’ve found

Yet it's only 20MHz...

maxtherabbit wrote on 2021-06-13, 00:37:

Yet it's only 20MHz...

And 53ns

The Computer Shopper always listed 50ns ram at astronomical prices as well

So yes it existed in the day but as stated 1991 hit 50ns was invented and after that literally no one cared about zero wait states or memory speeds

I remember this ad too, only ran for 2 or 3 months, the 53ns stands out in my mind but ad was in color showing the ram sticks too.

Cheers,