frontpagetDames | Staff posted Jul 24, 2025 07:45 PM
Item 1 of 4
Item 1 of 4
frontpagetDames | Staff posted Jul 24, 2025 07:45 PM
4TB WD_BLACK SN7100 PCIe Gen 4 NVMe M.2 2280 Internal SSD
+ Free Shipping$230
$270
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The SN7100, released in late 2024, is a much newer SSD with considerably more advanced 218-layer BiCS8 TLC NAND Flash. The SN850X was released in Mid-2022 and features a the 3 generations older 112-layer BiCS5 TLC NAND Flash. What this means is that the memory on the SN7100 occupies much less space. In fact I think the 1 and 2TB version only has ONE package on the PCB whereas the 4TB version has two. The SN850X on the other hand has twice as many. The SN850X also has a DRAM chip for caching whereas the SN7100 does away with it and instead rely on a small portion of NAND memory space in SLC mode for that. What that all means is that the SN7100 draws a lot less power -- 4.5 watts (max) / 0.095 watts (idle) vs 7.4 watts (max) / 1.1 watts (idle). This makes the SN7100 far superior for laptop applications where battery life is a concern.
In terms of raw performance, both are almost identical, with the SN7100 reaching 7,000~7,250 MB/s (read) / 6,700~6,900 MB/s (write) depending on capacity. The SN850X does 7,200~7,300 MB/s (read) / 6,300~6,600 MB/s (write), which is marginally faster in read speeds but slower in write speeds. Both drives are limited mostly by the PCIe 4.0 controllers -- the SN7100 having a 4ch x 2400 MT controller, whereas the SN850X has an 8ch x 1200 MT controller. Both are rated for 2400 TB written in endurance.
Given the similar performance but much lower power consumption (and heat output) of the SN7100, I'll say that the SN7100 is clearly the better drive. That said, if you have them in a Desktop PC, I doubt you'll care which one you have.
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The SN7100, released in late 2024, is a much newer SSD with considerably more advanced 218-layer BiCS8 TLC NAND Flash. The SN850X was released in Mid-2022 and features a the 3 generations older 112-layer BiCS5 TLC NAND Flash. What this means is that the memory on the SN7100 occupies much less space. In fact I think the 1 and 2TB version only has ONE package on the PCB whereas the 4TB version has two. The SN850X on the other hand has twice as many. The SN850X also has a DRAM chip for caching whereas the SN7100 does away with it and instead rely on a small portion of NAND memory space in SLC mode for that. What that all means is that the SN7100 draws a lot less power -- 4.5 watts (max) / 0.095 watts (idle) vs 7.4 watts (max) / 1.1 watts (idle). This makes the SN7100 far superior for laptop applications where battery life is a concern.
In terms of raw performance, both are almost identical, with the SN7100 reaching 7,000~7,250 MB/s (read) / 6,700~6,900 MB/s (write) depending on capacity. The SN850X does 7,200~7,300 MB/s (read) / 6,300~6,600 MB/s (write), which is marginally faster in read speeds but slower in write speeds. Both drives are limited mostly by the PCIe 4.0 controllers -- the SN7100 having a 4ch x 2400 MT controller, whereas the SN850X has an 8ch x 1200 MT controller. Both are rated for 2400 TB written in endurance.
Given the similar performance but much lower power consumption (and heat output) of the SN7100, I'll say that the SN7100 is clearly the better drive. That said, if you have them in a Desktop PC, I doubt you'll care which one you have.
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Right now, my shopping cart has a Predator GM7 4TB and a Samsung 990 Pro 2 TB.
I'm not married to anything, but I've got everything for my build except for a motherboard. The CPU is a 9800x3D from that Micro Center deal. And I am someone who has eight or nine 20+ TB external hard drives sitting around. So, if I had the extra space, I'd use it, but I don't want to bottleneck my main drive with an SSD that's problematic.
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Right now, my shopping cart has a Predator GM7 4TB and a Samsung 990 Pro 2 TB.
I'm not married to anything, but I've got everything for my build except for a motherboard. The CPU is a 9800x3D from that Micro Center deal. And I am someone who has eight or nine 20+ TB external hard drives sitting around. So, if I had the extra space, I'd use it, but I don't want to bottleneck my main drive with an SSD that's problematic.
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https://slickdeals.net/f/18472072-4tb-crucial-t500-gen4-nvme-m-2-internal-solid-state-drive-ssd-200-free-shipping
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It runs hot in the back of my itx motherboard though. 80c under load in the back, but the front one maxes at 55. Maybe shouldve got dram less or a gen 3 one for storage.
Use two of these in my PLEX server. They run 24/7/ 365 and run well. But transferring data to them does suck for big files or lots of files
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