Motherboard RAM Slots - CompTIA A+ 220-901 - 1.2
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Join them; it only takes a minute: Perhaps I may be overlooking some aspect that is an important cause as to why these don't exist, but I feel that having RAM expansions through PCIe would be perfectly feasible.
I know that a lot of operating systems use virtual memory and store some lower priority items on hard disks, but considering the lower speeds I feel that we could use some bonus not-quite-as-fast memory.
Why not have a PCIe board with a couple of RAM slots for use with the old RAM that you just replaced with that recent upgrade?
PCIe has the benefit of being on almost https://free-deposit-slots.website/memory-slots/two-slots-supporting-dual-channel-memory.html motherboard out there.
One 'adapter' PCIe RAM Expansion Board would be supposedly compatible most Memory expansion slots />What am I missing since this hasn't been done yet?
Note: Almost no PC have PCI-X.
It was development based on classical PCI and is not related to PCI Express often abbreviated PCIe.
In most cases, it is cheaper and better to simply replace the motherboard with a new motherboard that supports the amount memory expansion slots RAM that you require.
I have a motherboard here in front of me that can take 16 memory modules.
The largest memory expansion slots available is 32-Gig.
That's a total of 512 Gigabytes in a single machine.
Having the RAM on the MoBo means that it is the highest speed possible.
You can use it for both a RAM-Disk as well as normal program and data storage.
The best of both worlds.
But in your question you keep comparing it to SATA storage, so I am thinking that you'd want to use this extra RAM as a RAM-disk and not for general CPU Memory expansion slots />This is a valid use, and years ago people did have PCI cards with lots of RAM on it specifically for this purpose.
Those cards looked like another disk drive, and not just more CPU RAM.
Often these cards had an external power connector on them so you could give them some sort of backup power in case the main power failed.
These types of cards have largely gone away.
They were obsoleted mainly by three things: 1.
Motherboards now can have much more RAM on them than in the past.
There are more modern solid-state drives using Flash memory and PCIe some with large RAM caches that work better.
They were just too expensive for what memory expansion slots advantages it gave.
There are other reasons why you might want to have a PCIe card with lots of RAM, but all of them are applications where the card is doing memory expansion slots other than just storing data.
Like Video cards, or data acquisition cards.
These things do not apply here.
I've had a similar idea floating in the back of my head.
The concept was a PCIe or perhaps SATA3 based "drive" that uses inexpensive sticks of last-generation ram, for volatile-only use.
It should be possible to obtain SSD-like read speeds, with much faster write speeds, and by using last-gen sticks it memory expansion slots cost substantially less than adding more general RAM.
I suppose people find SSDs good-enough in most cases.
In a non-server environment, ram slots are often very scarce, and motherboard replacements are frequently non-viable.
In a server environment things are rather different.
Such a device would definitely have less impact there.
I'll also admit that this would work better if prices for old generation RAM dropped faster than they actually do.
More recently, PCIe flash usually with a DRAM cache has taken a similar role.
This was a way to get past the 1MB limit of the original PC.
Modern PCs have a section of extra RAM attached to the video card, separate from main memory.
The reason why you don't get RAM expansion cards nowadays is that latency is a serious problem.
There was no separate video memory, so the add-on also enabled 80 column text and double-resolution 'graphics'.
Any requirement to scale beyond that with faster-than-SATA speeds is covered by that boast x8 PCIe speeds and many TB of capacity without the data volatility issues associated with DRAM.
Your "midgrade system" is a rack mounted server.
Come on guys, we're talking enthusiast class.
With main memory being larger, there is also less of a need.
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Motherboard Expansion Slots and Bus Speeds - CompTIA A+ 220-901 - 1.2
When add or upgrading memory in a computer, you need to know how many memory slots are available, to make sure you purchase and add the correct memory chips. Review the sections below to determine the number of memory slots in your computer. Note Keep in mind that the memory already installed in.
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