Quote
A new player in the technology world is making waves by offering computer memory at a fraction of the usual cost. The Chinese company CXMT is now selling RAM for as low as $138. This is a significant drop compared to the global average price, which currently sits between $300 and $400. By offering such competitive pricing, CXMT is positioning itself as a major challenger to established tech giants. This move could lead to more affordable computers and electronics for consumers worldwide as other companies may be forced to lower their prices to stay competitive. The growth of CXMT represents China's broader push to become self-sufficient in semiconductor manufacturing, a field traditionally dominated by a few major international firms. For tech enthusiasts and budget-conscious builders, this price drop is a welcome shift in an often expensive market.
#RAM #DDR4 #DDR5 #LPDDR5 #LPDDR4 #China #technology #monopoly #disruption
My sentiments exactly
Monopolies need to be shattered
#RAM #DDR4 #DDR5 #LPDDR5 #LPDDR4 #China #technology #monopoly #disruption
RAM CXMT
RAM factory emerged
DDR5 RAM can be found for as little as USD138 (unverified source!)
Sources
https://www.cxmt.com/en/
https://www.cxmt.com/en/product.html
#RAM #DDR4 #DDR5 #LPDDR5 #LPDDR4 #China #technology #monopoly #disruption
Follow-up to this note.
Dragan had asked me to do repeated power-cycle tests with different kernel versions using the patched dtb for #RockPro64 to make sure the kernel #oops wouldn't still be an issue.
I learned that cutting the power of the device could kill the #LPDDR4 #RAM. This is documented in the specification referenced on the RockPro64 wiki page for Micron LPDDR4 Mobile LPDDR4 Datasheet as stated on page 37 in Uncontrolled Power-Off:
An uncontrolled power-off sequence can occur a maximum of 400 times over the life of the device.
I never had heard about this before! Cutting power without shutdown can kill my RAM?
show dmesg and shutdown
To get all the debugging information I needed I wanted the system after booting to print dmesg to the serial console, wait a short time and then actually shutdown.
Radio_Azureus
Tarnkappe.info
Chris Vogel
root:~# cat /root/bin/dmesg_and_shutdown.sh
#!/bin/bash
# a small script that outputs dmesg to serial
# console, waits 20 seconds and shuts down
dmesg > /dev/ttyS2
# show a message how to stop this script and wait 20 seconds
echo "Will shutdown in 20 seconds - to stop me call 'pkill dmesg_and_shut'" > /dev/ttyS2
sleep 20
echo "shutdown -h" > /dev/ttyS2
shutdown -h now
# a cronjob that runs after each boot
root:~# crontab -l
@reboot /root/bin/dmesg_and_shutdown.sh
powercycle the board
I took the time needed for a complete cycle of booting, showing dmesg, waiting and shutting down: well below 2 minutes.
To automate the power cycle I used an #esp8266 based power switch made by #Sonoff (Powr2) running ESP Easy (mega-20210503).
#ESPeasy offers a simple scripting language I used to powercycle after 120 seconds of being switched on:
On System#Boot do
gpio,12,0
gpio,13,1
endon
On button#button_state do
if [blue_led#blue_led_state]=1
gpio,13,0
timerSet,1,2
else
gpio,13,1
gpio,12,1
timerSet,1,0
timerSet,2,0
endif
endon
On Rules#Timer=1 do
gpio,12,0
timerSet,2,1
endon
On Rules#Timer=2 do
gpio,12,1
timerSet,1,2
endon
Pressing the button on the Sonoff device toggles between:
logging
minicom logged the serial output to a file.
Further down the #RabbitHole I went when looking at the resulting logfile…
💡 LPDDR5T, la DRAM di 7a generazione per smartphone più veloce al mondo
SK hynix Inc. crea un nuovo punto di riferimento nella tecnologia mobile con l'introduzione della LPDDR5T, la DRAM per dispositivi mobili più veloce al mondo.
https://gomoot.com/lpddr5t-la-dram-di-7a-generazione-per-smartphone-piu-veloce-al-mondo/
#DRAM #lpddr #LPDDR4 #LPDDR5T #LPDDR5X #mobile #Qualcomm #Samsung #semiconduttori #skhynix #Snapdragon8gen3 #TSMC #smartphone #tablet #rumors
SK hynix Inc. crea un nuovo punto di riferimento nella tecnologia mobile con l'introduzione della LPDDR5T, la DRAM per dispositivi mobili più veloce al mondo.
GOMOOT 
Computer Engineering JMU
heise online (inoffiziell)