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Parallella Community Supercomputing for Everyone 2013-03-13T16:09:45+00:00 https://parallella.org/forums/feed.php?f=23&t=201 2013-03-13T16:09:45+00:00 2013-03-13T16:09:45+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1251#p1251 <![CDATA[Re: the RAM]]> Statistics: Posted by Kcinnay — Wed Mar 13, 2013 4:09 pm

]]> 2013-03-10T10:28:07+00:00 2013-03-10T10:28:07+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1239#p1239 <![CDATA[Re: the RAM]]> Statistics: Posted by trioflex — Sun Mar 10, 2013 10:28 am

]]> 2013-03-09T22:25:02+00:00 2013-03-09T22:25:02+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1238#p1238 <![CDATA[Re: the RAM]]> Statistics: Posted by Kcinnay — Sat Mar 09, 2013 10:25 pm

]]> 2013-03-09T19:17:31+00:00 2013-03-09T19:17:31+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1237#p1237 <![CDATA[Re: the RAM]]> Statistics: Posted by trioflex — Sat Mar 09, 2013 7:17 pm

]]> 2013-03-09T15:11:28+00:00 2013-03-09T15:11:28+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1236#p1236 <![CDATA[Re: the RAM]]> Statistics: Posted by theover — Sat Mar 09, 2013 3:11 pm

]]> 2013-03-09T13:46:27+00:00 2013-03-09T13:46:27+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1235#p1235 <![CDATA[Re: the RAM]]>
The controller would take ~2% [2] of the Zynq 7020 FPGA area assuming similar synthesis result for Virtex 5 and Zynq 7020.

With the 48 signals available on the PEC_FPGA, it could be possible to connect a 8b/16b wide DDR3 using the PL I/O of the Zynq -- if 1.2/1.5 I/O levels [3] are available on chosen banks (I'm not sure).

Anyway, the performance will be lower than with the hard memory controllers of the Zynq and the PEC connector might impact performances.

Using the 24 differential pairs as a link with another FPGA dedicated to a DDR3 chip/SO-DIMM could give better performance imho.

[1] :
[2] :
[3] :

Statistics: Posted by Kcinnay — Sat Mar 09, 2013 1:46 pm

]]> 2013-03-06T08:20:20+00:00 2013-03-06T08:20:20+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1209#p1209 <![CDATA[Re: the RAM]]> Statistics: Posted by wuher — Wed Mar 06, 2013 8:20 am

]]> 2013-03-05T20:44:28+00:00 2013-03-05T20:44:28+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1204#p1204 <![CDATA[Re: the RAM]]>
I could understand when more ram would require more watt and therefore some problems with overheating or somesuch could evolve (however this kind of problems are usually solved by a new generation of memory chips). but other than that I really expected a 32bit system to address 4gb by default. similar with an intel-chip used in many laptops: even though the processor is 64bit it can use only 2gb! does anyone know how this limitation could be worked around on the zync-chip? maybe some sort of memory-switching, additional ram on a daughter-card? is there anything that could technically be done with usual home-equippment? (i.e. chips definitely cannot be swapped!) anyone experience with enhancing such a limited memory?

Statistics: Posted by piotr5 — Tue Mar 05, 2013 8:44 pm

]]> 2013-03-05T18:00:00+00:00 2013-03-05T18:00:00+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1202#p1202 <![CDATA[Re: the RAM]]> Statistics: Posted by 420maki — Tue Mar 05, 2013 6:00 pm

]]> 2013-03-05T17:28:16+00:00 2013-03-05T17:28:16+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1201#p1201 <![CDATA[Re: the RAM]]>
Tim

Statistics: Posted by timpart — Tue Mar 05, 2013 5:28 pm

]]> 2013-03-05T13:51:22+00:00 2013-03-05T13:51:22+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1200#p1200 <![CDATA[Re: the RAM]]> Statistics: Posted by trioflex — Tue Mar 05, 2013 1:51 pm

]]> 2013-03-05T09:06:24+00:00 2013-03-05T09:06:24+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1199#p1199 <![CDATA[Re: the RAM]]> Statistics: Posted by 9600 — Tue Mar 05, 2013 9:06 am

]]> 2013-03-05T05:53:03+00:00 2013-03-05T05:53:03+00:00 https://parallella.org/forums/viewtopic.php?t=201&p=1196#p1196 <![CDATA[the RAM]]> Statistics: Posted by 420maki — Tue Mar 05, 2013 5:53 am

]]>