Also, if you have a more specific question about memory types, I can try to answer them.
But honestly my knowledge getting dated too. For example, I don’t know much about the specifics of GDDR7 (RTX 5000 memory) off the top of my head.
Comment on Does the RAM being closed to CPU actually matter?
veloren23djk@lemmy.zip 2 weeks agoYou you know some resources when I can learn about these RAM technologies in depth (down to its physics)
brucethemoose@lemmy.world 2 weeks ago
justme@lemmy.dbzer0.com 2 weeks ago
my ADHD is acting up to much to read all the text above, so in case it wasn’t included: the is a physical limit to frequency in conventional conductors. normally metals have only ohm resistance, which does not depend on frequency and is generally rather low, but for instance in the case of copper a capacitative resistance significantly rises at around 1ghz, which gets only worse. this comes from structural effects in the lattice which form like small capacitors. i don’t know the exact details from a solid state point of view, just remember the fact itself from a fiber optics lecture.
long story short: for high frequency (ergo, high data throughout) signals the resistance becomes insane, so you want to have your conductors as short as possible.
another thing that just pops into mind: i remember that for pci-5 the motherboard length is also more limited, due to the same reason.
brucethemoose@lemmy.world 2 weeks ago
Like a primer? I don’t know anything off the top of my head, but all this stuff is literaly 1st-year computer engineering in college. The basic of ISAs, circuits, low level programming and computer design are all kinda background you need to understand why RAM trace length is so important.
There are definitely college courses you can look up and read for free.
Most “guides” you’d find on Google repeat outdated information; watch out for that. That’s why the Apple “memory on the CPU” thing keeps persisting; most discussion isn’t even updated to account for CAMM modules. But ECE focused magazines are good about covering and explaining commercial memory tech:
semiengineering.com
www.eetimes.com