11–20 of 67 posts
CXL is a standard for compute and I/O extension over PCIe signaling which has been around for a few years, with a couple of available RAM boards (from SMART and others). I think the main bridge chipsets come from Microchip (this one) and Montage. This Gigabyte product is interesting since it’s a little lower end than most AXL solutions - so far AXL memory expansion has mostly appeared in esoteric racked designs like…
> Buy From One of the Regions Below > Egypt :-/ But, because I'm a good sport, I actually chased a couple of those links figuring that I could convert Egyptian Pound into USD but https://www.sigma-computer.com/en/search?q=CXL%20R5X4 > is "No results", and similar for the other ones that I could get to even load
That is amazing. Most consumer boards will only have 32 or 64. To have 512 is great!
A lot of the initial use cases of CXL seem to be to use up lots of older DDR4 RDIMMs in newer systems to expand memory, eg cloud providers have a lot.
That is amazing. Most consumer boards will only have 32 or 64. To have 512 is great!
You havent seen the price of 128GB DDR5 RDIMMs, they are maybe $1300 each. A lot of the initial use cases of CXL seem to be to use up lots of older DDR4 RDIMMs in newer systems to expand memory, eg cloud providers have a lot.
Why did something like this take so long to exist? I’ve always wanted swap or tmpfs available on old RAM I have lying around.
CXL is going to be really interesting. On the positive side, you can scale out memory quite a lot, fill up PCI slots, even have memory external to your chassis. Memory tiering has a lot of potential. On the negative side, you've got latency costs to swallow up. You don't get distance from CPU for free (there's a reason the memory on your motherboard is as close as practical to the CPU) https://www.nextplatform.com/20…
CXL is going to be really interesting. On the positive side, you can scale out memory quite a lot, fill up PCI slots, even have memory external to your chassis. Memory tiering has a lot of potential. On the negative side, you've got latency costs to swallow up. You don't get distance from CPU for free (there's a reason the memory on your motherboard is as close as practical to the CPU) https://www.nextplatform.com/20…
Huh, 200ns is less than I imagined; even if it is still almost 100x slower than regular RAM, it's still around 100x faster than NVMe storage.
Why did something like this take so long to exist? I’ve always wanted swap or tmpfs available on old RAM I have lying around.
For example:
https://en.wikipedia.org/wiki/I-RAM
(Not a unique thing, merely the first one I found).
And then there are the more exotic options, like the stuff that these folk used to make: https://en.wikipedia.org/wiki/Texas_Memory_Systems - iirc - Eve Online used the RamSan product line (apparently starting in 2005: https://www.eveonline.com/news/view/a-history-of-eve-databas... )