PCWorld (USA)

Crucial P5 Plus: A fast PCIE 4 SSD with tough competitio­n

This follow-on to the affordable and speedy P5 is (slightly) faster and supports PCIE 4, but it’s also significan­tly pricier.

- BY JON L. JACOBI

The P5 Plus is the follow-on to Crucial’s affordable and surprising­ly fast P5 NVME SSD ( go.pcworld. com/crp5). It’s a worthy encore, at least in terms of performanc­e. Not only is this new version slightly faster, it offers the PCIE 4 support the older drive lacks. Alas, that slight uptick in performanc­e and the PCIE 4 support also come with a significan­t price bump, putting it in direct competitio­n with Samsung’s excellent 980 Pro ( go.pcworld.com/980p).

Note that Crucial has come under fire for switching from TLC to far slower QLC in its P2 SSD without changing the name. Should your P5 not perform up to our numbers, let us know.

DESIGN AND FEATURES

The Crucial P5 Plus comes in at $108 for 500GB ( go.pcworld.com/c50g), $180 for 1TB, what we tested ( go.pcworld.com/c1tb), and $367 for 2TB ( go.pcworld.com/c2tb) flavors. The PCIE 4.0, x4 SSD uses the standard 2280 (22mm wide, 80mm long) form factor and employs 176-layer, TLC (Triple-level Cell/3-bit) NAND with an in-house Micron controller.

The Crucial P5 Plus is warrantied for five years, as well as rated for 300TBW (terabytes that can be written) per 500GB of capacity. That’s in line with the drive’s price. Though essentiall­y the same as pro drives, consumer drives are expected to see less use and are priced accordingl­y. They carry lower ratings, which will mitigate the warranty, to discourage high-transactio­n use in servers and other intense endeavors. That said, most users will never write nearly as much data as even bargain drives are rated for.

I have to mention Crucial including an M.2 mounting screw in the box. Losing those little suckers has been a problem as long as I’ve been testing the type. Nice touch.

PERFORMANC­E

Because of the older P5’s surprising­ly fast performanc­e, the good numbers turned in by the 1TB P5 Plus that Crucial sent were hardly unexpected. In general, it outpaced its predecesso­r by about 5 to 10 percent. Massive 450GB writes slowed down by a third once they got about two-thirds into the operation, and peak PCIE 4 write speed wasn’t rated top-tier by synthetic benchmarks. Other than that, especially in real-life transfers, it was all good.

Crystaldis­kmark 6 was slightly pessimisti­c about the P5 Plus’s write speed over PCIE 4 compared to the other drives. However, 5Gbps is still a very nice boost over PCIE 3—the non-plus P5 topped out at 3.3Gbps over that interface, as does the P5 Plus when you plug it into a PCI 3 system.

As noted, the Crucial P5 Plus’s real-world sustained reads and writes (shown below) were very good. It lost to the top-ranked Seagate Firecuda 530 and aforementi­oned Samsung 980 Pro, but not by a large margin.

The P5 Plus lost half a star in our final rating due to a drop in write speed during our long 450GB write, which we run to show where drives run out of main cache as well as the native speed of the NAND. Main cache (not DRAM) is NAND treated as SLC (Single Level Cell). Writing a single bit is far faster than writing three as you would do natively with TLC NAND. Contents of the cache are transferre­d to three bits when the drive has time.

For the 1TB P5 Plus tested, cache ran out at around the 315GB mark of our 450GB

write test. The 500GB capacity will likely run out sooner and turn in slower times, while the 2TB capacity will probably not run out at all and shave a hundred seconds off the times shown above. Slowdowns somewhere during this test are the general rule for second-tier or lower drives—kingston’s KC2500 ( go. pcworld.com/kn25) excepted. As to the meaningful­ness of this test, most normal users will rarely if ever move more than 315GB of data in one go.

All in all, the Crucial P5 Pro is a very good performer in just about every scenario the average user is likely to experience.

The PCIE 3 tests utilized Windows 10 64-bit running on a Core i7-5820k/asus X99 Deluxe system with four 16GB

Where the Crucial P5 Plus really showed its lowcost nature was in our long 450GB write. Up to about 315GB it was as fast as the rest, but then it throttled down as it ran out of cache.

Kingston 2666MHZ DDR4 modules, a Zotac (Nvidia) GT 710 1GB x2 PCIE graphics card, and an Asmedia ASM3242 USB 3.2x2 card. It also contains a Gigabyte Gc-alpine Thunderbol­t 3 card, and Softperfec­t Ramdisk 3.4.6 for the 48GB read and write tests.

The PCIE 4 testing was done on an MSI

MEG X570 motherboar­d socketing an AMD Ryzen 7 3700X 8-core CPU, using the same Kingston DRAM, cards, and software. All testing is performed on an empty or nearly empty drive that’s TRIM’D after every set of tests. Performanc­e will decrease as the drive fills up.

If your performanc­e varies drasticall­y from what we found with our review drive, please let us know.

BOTTOM LINE

The P5 Plus is a very good NVME SSD, but it’s not the bargain its predecesso­r was. I still recommend the older drive for PCIE 3 users seeking to save money, but at the time of this writing, the more consistent-performing Samsung 980 Pro ( go.pcworld.com/980p) is priced lower than the P5

Plus. That makes the P5 Plus a bit of a tough sell.

 ?? ??
 ?? ?? Crucial sent us this image of the speedy P5 Plus, which illustrate­s the 2280 form factor perfectly.
Crucial sent us this image of the speedy P5 Plus, which illustrate­s the 2280 form factor perfectly.
 ?? ?? Real-world performanc­e leveled the playing field slightly, with the P5 Plus only losing to Seagate’s best-of-breed Firecuda 530 ( go.pcworld.com/
fcda) and the Samsung 980 Pro by a small margin.
Real-world performanc­e leveled the playing field slightly, with the P5 Plus only losing to Seagate’s best-of-breed Firecuda 530 ( go.pcworld.com/ fcda) and the Samsung 980 Pro by a small margin.
 ?? ?? The Crucial P5 Plus can’t quite keep up with the better drives in synthetic benchmarks such as Crystaldis­kmark 6, but it’s still a dramatic improvemen­t over PCIE 3.
The Crucial P5 Plus can’t quite keep up with the better drives in synthetic benchmarks such as Crystaldis­kmark 6, but it’s still a dramatic improvemen­t over PCIE 3.
 ?? ?? Here you can see the P5 Plus running out of cache at around the 315GB mark in a 450GB write.
Here you can see the P5 Plus running out of cache at around the 315GB mark in a 450GB write.

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