You are here: romanrm.net » Loongson-based devices » Upgrading RAM in Loongson2F-based computers
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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.gz · Last modified: 2019-08-24 17:51 UTC by rm