Thursday, July 30
Turtles, Termites, And Traffic Jams Edition
- According to Wikipedia, all DDR5 memory modules are registered.
I took a quick look at the docs released by Micron, and they only discuss registered modules, but don't explicitly say that unbuffered modules don't / won't exist.
If they are all registered - and we already know that DDR5 mandates on-die ECC - then there's little difference between desktop RAM and server RAM. Just full-channel ECC in case of bus errors, and LR (load reduced) modules for maximum die stacking.
I'm not certain if DDR5 being registered will work exactly as it does with DDR4, but if it does then the next generation of desktop CPUs will support at least twice as much memory, without needing to wait years for denser DRAM.
Which means that the next-plus-one generation of even entry-level servers will likely support up to 32 cores and 256GB of RAM.
- Zen 3 is due this year. (AnandTech)
Speak the name three times and it will appear.
This means both server and desktop parts. Also next-generation Navi cards for both gaming and datacenter use. Oh, and Xbox Series X and Playstation 5. It will be a busy few months for AMD.
- A passively-cooled 10Gb home server/router from Supermicro for only $1500. (AnandTech)
It's no Cobalt Qube.
- Two of Intel's next-generation Ice Lake Xeons beat a single current-generation Epyc. (Tom's Hardware)
By 7%. If you use AVX-512, which Epyc doesn't have. Will wait for more benchmarks, because Ice Lake should be a significant upgrade, if and when it ever arrives.
- Someone needs to explain to physicists that humans don't live in trees. (Vice)
- A lot has been written about the technological singularity. My view is that (a) it's impossible (at least the way it is depicted in science fiction) and (b) as far as it is possible, it is happening right now which is part of the reason everything is so fucking weird.
I'm not the only one to make that observation. (Less Wrong)
Also of interest is this article about the potential speed of the singularity. (Sideways View)
The two things to expect when it really kicks into gear, is rapid shifting in the labour market leading to high unemployment, and at the same time, global GDP growth in the mid double digits.
The key point of the notiong of the Singularity, though, is that at some point the trends go literally vertical, and that prediction of what things will be like on the other side of that point on the graph are impossible. That is exactly what I predict will not happen, though if I'm wrong no-one will ever know.
Update: Although she's 15 years old rather than 8 this time, she's still the same lovable idiot.
If anyone can find a way to maintain the distinction, you can trust Intel will do so.
Posted by: Rick C at Thursday, July 30 2020 01:56 AM (Iwkd4)
Posted by: Rick C at Thursday, July 30 2020 01:57 AM (Iwkd4)
Also, I had read that the on-die ECC, IIRC, is not the same as the ECC on current DIMMs--it's internal to the chips, again, IIRC. But then again, https://www.rambus.com/blogs/get-ready-for-ddr5-dimm-chipsets/ from Rambus says "With DDR5, each DIMM will have two channels. Each of these channels will be 40-bits wide: 32 data bits with eight ECC bits. ".
Posted by: Rick C at Thursday, July 30 2020 02:04 AM (Iwkd4)
Posted by: Rick C at Thursday, July 30 2020 02:07 AM (Iwkd4)
Posted by: Rick C at Thursday, July 30 2020 02:12 AM (Iwkd4)
Posted by: Jay at Thursday, July 30 2020 02:39 AM (0jVI9)
Also, I didn't mention this in my prior comment, but in the US, tree acreage has basically been stable since about 1910 (and is actually a bit up since then, something like 740M acres now vs 730M then). In other words about the time (very roughly speaking) we realized we were cutting down too many forests we took steps to start replanting.)
Posted by: Rick C at Thursday, July 30 2020 07:28 AM (Iwkd4)
So for big servers with terabytes of RAM, you'll definitely want module-level ECC, and load-reduced modules, but for the average small server - anything up to 32 cores - desktop RAM will be a viable option.
Posted by: Pixy Misa at Thursday, July 30 2020 09:37 AM (PiXy!)
Posted by: normal at Thursday, July 30 2020 11:06 AM (obo9H)
Of course it is, and it's telling that the watermelons have to fall back to saying that when it's shown there's more trees now.
Posted by: Rick C at Thursday, July 30 2020 11:16 AM (Iwkd4)
Posted by: Rick C at Thursday, July 30 2020 11:18 AM (Iwkd4)
Posted by: Pixy Misa at Thursday, July 30 2020 11:44 AM (PiXy!)
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