expired Posted by Suryasis • Aug 9, 2022
Aug 9, 2022 6:06 PM
Item 1 of 5
Item 1 of 5
expired Posted by Suryasis • Aug 9, 2022
Aug 9, 2022 6:06 PM
1TB Kingston NV1 M.2 2280 NVMe 3.0 PCIe Solid State Drive
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DRAM is used to store an index (a "map") so that when you look for a file, it knows exactly where to find it (think of a card catalog in a library). DRAM-less SSDs would store this on the NAND flash itself, which is slower than DRAM. Storing this information on the NAND flash would introduce more wear, but that's where wear-leveling technology comes in. Now, wear-leveling also would introduce a bit more latency, but it's a good trade-off to extend the life of the drive.
More recently, to reduce the latency of DRAM-less SSDs, modern NVMe drives (NVMe version 1.2 and higher - NOT the same as PCIe version) now leverage HMB technology (host memory buffer), which borrows the system memory in place of a dedicated DRAM. This significantly improved the performance of DRAM-less SSDs, so when you hear things like "DRAM-less SSDs are worse than hard drives!", that's simply not true (and never really was for the vast majority of people). This does not use a significant amount of system memory, so don't go out and upgrade your kit to 64gb.
Even what I said is likely a simplification (there's also stuff to consider such as how much space is needed for the mapping index), but hopefully this helps explain that DRAM-less SSDs are not somehow "garbage" as some would quickly declare.
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Same as my Crucial P2 in a i5 6th gen. Samsung 970 performed just about the same.
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DRAM is used to store an index (a "map") so that when you look for a file, it knows exactly where to find it (think of a card catalog in a library). DRAM-less SSDs would store this on the NAND flash itself, which is slower than DRAM. Storing this information on the NAND flash would introduce more wear, but that's where wear-leveling technology comes in. Now, wear-leveling also would introduce a bit more latency, but it's a good trade-off to extend the life of the drive.
More recently, to reduce the latency of DRAM-less SSDs, modern NVMe drives (NVMe version 1.2 and higher - NOT the same as PCIe version) now leverage HMB technology (host memory buffer), which borrows the system memory in place of a dedicated DRAM. This significantly improved the performance of DRAM-less SSDs, so when you hear things like "DRAM-less SSDs are worse than hard drives!", that's simply not true (and never really was for the vast majority of people). This does not use a significant amount of system memory, so don't go out and upgrade your kit to 64gb.
Even what I said is likely a simplification (there's also stuff to consider such as how much space is needed for the mapping index), but hopefully this helps explain that DRAM-less SSDs are not somehow "garbage" as some would quickly declare.
DRAM is used to store an index (a "map") so that when you look for a file, it knows exactly where to find it (think of a card catalog in a library). DRAM-less SSDs would store this on the NAND flash itself, which is slower than DRAM. Storing this information on the NAND flash would introduce more wear, but that's where wear-leveling technology comes in. Now, wear-leveling also would introduce a bit more latency, but it's a good trade-off to extend the life of the drive.
More recently, to reduce the latency of DRAM-less SSDs, modern NVMe drives (NVMe version 1.2 and higher - NOT the same as PCIe version) now leverage HMB technology (host memory buffer), which borrows the system memory in place of a dedicated DRAM. This significantly improved the performance of DRAM-less SSDs, so when you hear things like "DRAM-less SSDs are worse than hard drives!", that's simply not true (and never really was for the vast majority of people). This does not use a significant amount of system memory, so don't go out and upgrade your kit to 64gb.
Even what I said is likely a simplification (there's also stuff to consider such as how much space is needed for the mapping index), but hopefully this helps explain that DRAM-less SSDs are not somehow "garbage" as some would quickly declare.
Our community has rated this post as helpful. If you agree, why not thank Linoleum
Same as my Crucial P2 in a i5 6th gen. Samsung 970 performed just about the same.
DRAM is used to store an index (a "map") so that when you look for a file, it knows exactly where to find it (think of a card catalog in a library). DRAM-less SSDs would store this on the NAND flash itself, which is slower than DRAM. Storing this information on the NAND flash would introduce more wear, but that's where wear-leveling technology comes in. Now, wear-leveling also would introduce a bit more latency, but it's a good trade-off to extend the life of the drive.
More recently, to reduce the latency of DRAM-less SSDs, modern NVMe drives (NVMe version 1.2 and higher - NOT the same as PCIe version) now leverage HMB technology (host memory buffer), which borrows the system memory in place of a dedicated DRAM. This significantly improved the performance of DRAM-less SSDs, so when you hear things like "DRAM-less SSDs are worse than hard drives!", that's simply not true (and never really was for the vast majority of people). This does not use a significant amount of system memory, so don't go out and upgrade your kit to 64gb.
Even what I said is likely a simplification (there's also stuff to consider such as how much space is needed for the mapping index), but hopefully this helps explain that DRAM-less SSDs are not somehow "garbage" as some would quickly declare.
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