Kingston NV2 2TB - cheapest way to add a 4TB Raid-0 NVMe gamedrive

Jul 27, 2020
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Benchmarks look fine for a DRAM-less SSD.
 

Captante

Lifer
Oct 20, 2003
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I wonder how 2 of them would do on an add-in 8x PCIe NVME card?

:p

And only certain drive-benchmarks will be affected by "no DRAM" cache drives (typically BIG reads/writes) so depending on how the drive is used it's possible to never notice it "seat-of-the-pants" for home-users.

OTOH if you frequently deal with large media file-transfers or databases you might end up regretting the purchase after hitting the "cache-wall" a few times and dropping to sub-HDD speeds.
 
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Jul 27, 2020
24,043
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OTOH if you frequently deal with large media file-transfers or databases you might end up regretting the purchase after hitting the "cache-wall" a few times and dropping to sub-HDD speeds.
That's why I would do the RAID-0 to mitigate some of the performance loss. Twice the throughput should mean cutting transfer times in half.
 
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Captante

Lifer
Oct 20, 2003
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That's why I would do the RAID-0 to mitigate some of the performance loss. Twice the throughput should mean cutting transfer times in half.

Game-levels are typically NOT big enough to run into the cache problem even on a single drive so these in RAID 0 used as a Steam drive might be interesting!
 
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Captante

Lifer
Oct 20, 2003
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Right now I have Steam running on a dedicated Crucial 1tb Gen 3 NVME. (original P5 w/DRAM)

Pretty sure RAID 0 will result in the exact same cache usage in both drives so it won't mitigate the problem of no DRAM in applications where it comes up.
 
Jul 27, 2020
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Pretty sure RAID 0 will result in the exact same cache usage in both drives so it won't mitigate the problem of no DRAM in applications where it comes up.

Write speed starts out at around 2.8 GB/s, which is surprisingly low for a "PCIe 4.0 SSD", and in the range of what we're usually seeing on Gen 3 SSDs. The underlying reason is that there's only four flash channels, so writing is slower. Once 88 GB have been written, the pseudo-SLC cache is full, and the drive has to write to flash directly. 88 GB for a 1 TB SSD in 2022 is relatively small, but still ok. Writes now run at a very respectable 600 MB/s—considerably faster than what SATA drives offer. Only once 800 GB have been written to the drive, performance starts jumping between 600 and 80 MB/s, averaging to around 400 MB/s, until the drive is full. This is a HUGE improvement compared to the Kingston NV1, which dropped to approximately 100 MB/s once the SLC cache was full.

With RAID-0, in worst case you would have to write 1.6 TB of data for performance to falter below a constant 600 MB/s.
 
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