There may be some inner power state that is wrong.
- http://superuser.com/questions/459957/thinkpad-t60-does-not-turn-on
- https://www.youtube.com/watch?v=Lqg5wQpkK14
Steps:
- take out power cord
- take out battery
- hold power for 30 seconds or more
- put back power cord, not battery
- try turning on again
Used in the space station: https://www.youtube.com/watch?v=WkYz43qALMU
In 2015, what we use for memory: https://en.wikipedia.org/wiki/Dynamic_random-access_memory
In 2015, what we use for caches: https://en.wikipedia.org/wiki/Dynamic_random-access_memory
Faster and more expensive than DRAM: https://en.wikipedia.org/wiki/Static_random-access_memory
https://en.wikipedia.org/wiki/ECC_memory
Error-correcting code memory.
For applications where errors cannot be tolerated like scientific and financial computing.
Wiki article also talks about DRAM taken to space to observe bit flip ratio, which basically proves that they are caused mostly by cosmic ray neutron secondaries.
https://en.wikipedia.org/wiki/Power_usage_effectiveness
https://en.wikipedia.org/wiki/Display_aspect_ratio
4:3 was the original TV.
16:9 was first introduced for films, and then adopted by laptops in 2008. Also plays well with the keyboard, which is itself rectangular and not square.
Ways to connect hardware to the motherboard.
First came ISA, then PCI, and then PCIe.
- http://www.anandtech.com/ hardware reviews and information
- http://www.phoronix.com/ Linux hardware support, in particular of GPUs
https://en.wikipedia.org/wiki/Foundry_model#Foundry_sales_leaders_by_year
Became fabless in 2009 after spinning out Global Foundries.
https://en.wikipedia.org/wiki/Semiconductor_fabrication_plant
The hardcore applied physics / robotics guys go there!
http://www.masterslair.com/determining-your-maximum-bclk-base-clock-frequency-i7-i5-i3