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loongson:2f-ram [2019-08-24 17:51 UTC]
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loongson:2f-ram [2019-12-09 10:39 UTC] (current)
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==== EMTEC Gdium, on the other hand, ==== ==== EMTEC Gdium, on the other hand, ====
...has been reported to work with just a random 2GB module made by Transcend, marked as '2G DDR2 667 SO-DIMM CL6', part number 221787-4078 and on a separate sticker JM667QSU-2G-E -- with 8 chips on each side. Maybe [[https://en.wikipedia.org/wiki/Gdium|Gdium]] has a more favorable board layout for high-capacity DDR, despite the memory controller being within the CPU (and in theory same limitations would apply to all hardware based on it). ...has been reported to work with just a random 2GB module made by Transcend, marked as '2G DDR2 667 SO-DIMM CL6', part number 221787-4078 and on a separate sticker JM667QSU-2G-E -- with 8 chips on each side. Maybe [[https://en.wikipedia.org/wiki/Gdium|Gdium]] has a more favorable board layout for high-capacity DDR, despite the memory controller being within the CPU (and in theory same limitations would apply to all hardware based on it).
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 +==== and even Fuloong, ====
 +"...the Lemote Fuloong seems more resilient to the type of RAM it accepts, and jasper@ mentioned he successfully upgraded his device using a Kingston 2GB DDR2 SO-DIMM module (KFJ-FPC218/2G). Unfortunately, this module does not work on any of my Yeeloongs."((https://www.cambus.net/openbsd-loongson-on-the-lemote-yeeloong-8101b/))
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 +KFJ-FPC218/2G appears to be a dual-rank module, so it might be that on the Fuloong (some of?)those actually can work.
==== 1GB or 2GB? ==== ==== 1GB or 2GB? ====
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==== Testing the new RAM ==== ==== Testing the new RAM ====
After installing your new RAM stick, make sure the stability is not compromised. Unforunately the well-known "Memtest86+" does not exist for MIPS, but you can use the [[pdo>memtester]] package, first closing all the memory-hungry apps including X.org (so that almost all RAM is free), then running memtester with a value close to the total amount of RAM (leave about 50 MB for the OS). After installing your new RAM stick, make sure the stability is not compromised. Unforunately the well-known "Memtest86+" does not exist for MIPS, but you can use the [[pdo>memtester]] package, first closing all the memory-hungry apps including X.org (so that almost all RAM is free), then running memtester with a value close to the total amount of RAM (leave about 50 MB for the OS).
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===== Links ===== ===== Links =====

loongson/2f-ram.1566669117.txt · Last modified: 2019-08-24 17:51 UTC by rm