I apologize for DOS'ing the list, I can only get online about once a week. On Wed, 3 May 2017 11:38:26 +0100 Luke Kenneth Casson Leighton <[email protected]> wrote: > On Wed, May 3, 2017 at 11:28 AM, zap <[email protected]> wrote: > > > > > > On 05/03/2017 01:01 AM, Luke Kenneth Casson Leighton wrote: > >> --- > >> crowd-funded eco-conscious hardware: > >> https://www.crowdsupply.com/eoma68 > >> > >> > >> On Tue, May 2, 2017 at 10:50 PM, zap <[email protected]> > >> wrote: > >>> I assume that's going to be the third series of libre cards right? > >>> you making a lowrisc based processor and graphics, etc, > >> more likely the fourth or fifth. all these things happen in > >> parallel. the one after the RK3288 to investigate is the RK3399 > >> (6-core). also i've heard that the iMX7 is out so am having a look > >> at that. > > > > RK3399... 11.0 ghz speed if you count all the four cores which are 2 > > ghz each and 1.5 for the other ones... > > > > wow... > > > > I wonder how much watts that processor uses... > > > > that is crazy fast. I mean really... 4GB ram too I see as the norm. > > which is good. > > > > on a different note though, perchance will the fourth or fifth series > > of libre cards support 8gb of ram or more? > > > > I bet you could even get it to 16gb if you wanted... though that > > wouldn't be needed. heh. > > the cost of the RAM ICs to do that are insane. the 1GB DDR3x16 ICs > are already $10 **EACH**. > > normally a DIMM would have 8 or 16 RAM ICs, meaning that for a 4GB > DIMM you need 8x 512mb ICs, or you could do 8GB by using 16 of them.
But that would mean that an 8GiB stick for a desktop would cost $80 just for the ICs. I can find 8GiB of RAM for $60 and cheaper, I bet, if I poked my nose around. Or maybe desktops don't need ICs??? > normally you get 2 (matched) DIMMS totalling 8GB. > > if you want *32* GB you get 2 matched DIMMs, but nobody in > "mass-production" is shipping windows PCs or laptops with 32GB of RAM > (and if they are it's DDR4) You write that as though being dismissive of DDR4. Why is DDR4 currently unacceptable for one of your designs? > additionally, it would need either 2 pairs of x32 DDR RAM > controllers, or it would be necessary to do a cascade layout: a > daisy-chain of RAM ICs.... and i'm not sure it would be possible to > fit 8 RAM ICs onto the 43x78mm PCB anyway. > > bottom line it's far too expensive and quite impractical. 4GB is the > practical limit at the moment and even that's stupidly expensive > relatively speaking. > > l. Well, I bought a 4GiB RK3399 SOC card fro firefly for $200. Don't get me wrong, I love your effort, but I need RAM, CPU power, lots of ports, and more screen landscape. Hmm, maybe you should invent an OpenSource IC? Sincerely, David _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
