Micron's consumer brand Crucial has introduced two new NVMe SSD product lines, including their first high-end NVMe SSD which features Micron's in-house SSD controller design. However, Crucial's adoption of NVMe continues to lag behind most brands as both new models are still using PCIe 3 interfaces while the high-end market is migrating to PCIe 4.

The Crucial P5 is the first retail SSD to use a controller designed by Micron. Their in-house SSD controller design efforts date back at least as far as their 2015 acquisition of Tidal Systems, but the first product with a Micron-designed SSD controller only showed up a year ago: the Micron 2200 series client OEM SSD. The Crucial P5 is a clear step up from that, but still uses a PCIe gen3 interface, so it won't be setting any performance records and will face an increasing number of PCIe gen4 competitors as the year goes on. However, it should still deliver solid performance for all but the most demanding prosumer use cases, especially since it looks like Intel won't be offering PCIe gen4 host support this year. The P5 also includes support for all the usual encryption standards, features that are missing from many high-end NVMe SSDs that target the consumer market exclusively and not business customers.

Crucial P5 SSD Specifications
Capacity 250 GB 500GB 1 TB 2 TB
Form Factor M.2 2280
Interface PCIe 3.0 x4, NVMe
Controller Micron in-house design
NAND Flash Micron 96L 3D TLC*
Sequential Read 3400 MB/s
Sequential Write 1400 MB/s 3000 MB/s
Random Read IOPS 210k 390k 430k
Random Write IOPS 355k 500k
Max Power 7 W
Encryption TCG Opal 2.0, IEEE 1667, eDrive
Warranty 5 years
Write Endurance 150 TB
0.3 DWPD
300 TB
0.3 DWPD
600 TB
0.3 DWPD
1200 TB
0.3 DWPD

The Crucial P2 is their second entry-level NVMe SSD, but it is not a direct replacement for the QLC-based P1. The P2 is at least initially only available in low capacities of 250GB and 500GB, and cuts costs by using a DRAMless controller with TLC NAND rather than the P1's combination of cheaper QLC NAND but a controller with a DRAM cache. Micron hasn't disclosed what controller is used on the P2, but it seems likely they're sourcing from a third party as with previous Crucial SSDs—and it might not even be the same controller for both capacities. While both capacities have performance specs that fall within the ranges we expect for a four-channel DRAMless NVMe SSD, the 500GB model is actually the slower one by most metrics.  This indicates that at least one of either the NAND or the controller is meaningfully different from the 250GB model. The 500GB might be using NAND parts with a higher per-die capacity and thus not have any greater parallelism, or it may be using an entirely different controller (or both). The 500GB model's endurance rating is also the same 150TB as the 250GB model, which puts it in QLC territory (though still better than the 500GB P1's 100TBW rating).

Micron's press release for the P2 mentions that it will be available in capacities up to 1TB, but the spec sheets make no mention of the 1TB model. This may be another situation like the 2TB Crucial P1 that was announced as coming a bit later than the rest of the lineup, but never hit the market.

Crucial P2 SSD Specifications
Capacity 250 GB 500GB
Form Factor M.2 2280
Interface PCIe 3.0 x4, NVMe
Controller undisclosed
NAND Flash Micron 96L 3D TLC*
Sequential Read 2100 MB/s 2300 MB/s
Sequential Write 1150 MB/s 940 MB/s
Random Read IOPS 170k 95k
Random Write IOPS 260k 215k
Max Power 2.5 W 3.5 W
Encryption None
Warranty 5 years
Write Endurance 150 TB
0.3 DWPD
150 TB
0.16 DWPD
MSRP $54.99

Micron has confirmed that both the P2 and P5 are currently using their 96L 3D TLC NAND, but they reserve the right to change that in the future. It's unlikely that the P5 will be switched to QLC NAND, but much like the MX500 SATA drive this model might stick around for years even after a replacement with a faster interface (PCIe 4) is introduced. In that case, it would be reasonable to expect the P5 to be updated with a newer generation of TLC NAND, and performance probably won't change significantly. The P2 product line could easily become a mix of TLC and QLC, which Micron has done with the entry-level BX500 SATA SSDs. If/when the P2 gets 1TB or larger capacity options those would seem likely to use QLC NAND, and the 500GB model could probably also be switched to QLC given that its rated performance is not too different from the 500GB P1. We encourage Micron to be more transparent about their controller and NAND choices and especially any post-launch changes.

The Crucial P5 is not yet listed on online retailers, but Crucial.com has the P2 available for direct purchase and it's starting to show up on some online retailers. Launch prices of $55 and $65 are similar to competitors like the WD Blue SN550, but Western Digital has set a performance standard for entry-level NVMe drives which the Crucial P2 may have trouble beating.

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  • brontes - Thursday, April 23, 2020 - link

    I'm love to see new in-house controllers! Even if it's a low end dramless, you have to start somewhere. I always welcome some product differentiation beyond "its another e12/e16" or "samsung."
  • ThortonBe - Thursday, April 23, 2020 - link

    I agree that it is very exciting to see a new controller. The article says the in house controller is in the P5 which does have DRAM.
  • The_Assimilator - Thursday, April 23, 2020 - link

    Seeing a new controller is nice, yes, but unless it actually performs it's not much use.
  • mode_13h - Thursday, April 23, 2020 - link

    I wonder if it'll have end-to-end data protection and RAIN, or if you now have to go to the Micron-branded professional models for that.

    Besides that, let's hope it's priced competitively for its performance. That was a strong selling-point of the MX series (excluding the MX300, which was basically a dud).
  • Adramtech - Thursday, April 23, 2020 - link

    The P5 could be switched to 128L Replacement Gate in the future.
  • Christobevii3 - Thursday, April 23, 2020 - link

    I will never buy another crucial drive. Their support and RMA process is terrible. It is basically impossible to RMA a drive and a huge liability when buying 200 drives at a time for a business.
  • watzupken - Monday, May 4, 2020 - link

    Good to see another alternative. While i don't expect the MSRP to be low, I do hope to see them sell it at a cheaper price in retail market. I also don't feel the lack of PCIE 4 is going to be a show stopper since I don't see a meaningful improvement in real life performance for most users, beyond the increase in seq read/write speed from the transition from PCIE 3 to 4 that we see on benchmarks.
    As for Samsung, while they make good SSDs, they have effectively priced themselves out of the market. In the past, people always look to them for fast SSDs, and willing to pay the premium. With so many good SSDs popping out now, there is little reason to shell out extra money for Samsung drives.
  • Paulone - Friday, May 8, 2020 - link

    I bought 2 for my NAS. There are incompatible.... But P1, yes. Something wrong.

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