Final Words

The Plextor M8Pe cannot keep up with Samsung's 960 Pro, but otherwise it is a solid contender in the PCIe SSD space. Its overall performance is near the Samsung 960 EVO and the Toshiba OCZ RD400. All of them offer better real-world performance than Intel's SSD 750, showing that the PCIe SSD market has progressed and expanded greatly since that first consumer NVMe SSD. This level of performance now represents the middle range of the PCIe SSD market, where the Intel SSD 750 was a very exclusive top of the line product.

The M8Pe has once again shown that M.2 PCIe SSDs walk a fine line with with their power and temperature management. Comparing the M8Pe with and without its heatsink shows large performance differences on many of our long-running synthetic benchmarks, but minimal differences on our AnandTech Storage Bench tests that replicate real-world I/O patterns. Even though the M8Pe uses more power than most of its M.2 PCIe competitors, a heatsink is still not necessary for ordinary use. This is the same conclusion we came to with the Samsung 950 Pro and the Toshiba OCZ RD400. For users with unusually heavy storage workloads or with a concern for the aesthetics of their SSDs, Plextor offers two different cooling options: the M8PeY LED-lit add-in card with a substantial heatsink over the drive, or the similarly styled heatspreader on the M8PeG variant.

The performance differences between the Plextor M8Pe and the Toshiba OCZ RD400 are small enough that it will usually make sense to get whichever is cheaper at the moment. The RD400 does seem to have better write speeds while the M8Pe has better read speeds, but this adds up to only a slight advantage for the RD400 on our more realistic AnandTech Storage Bench tests. The RD400 also has lower power consumption than the M8Pe, which makes it less susceptible to thermal throttling during sustained loads.

The one big surprise from the Plextor M8Pe was its steady-state random write performance. With the heatsink it performed in the same league as the Intel SSD 750 and Samsung's 960 Pro and EVO. Even without the heatsink, it performed better than most consumer SSDs. Furthermore, when given the benefit of some extra spare area to work with, the M8Pe with a heatsink turned in the fastest steady-state random write speed we've measured on a consumer SSD. This shows that the Marvell 88SS1093 controller is quite capable of competing against Samsung's Polaris controller and even the enterprise-grade 18-channel monster from Intel. The Marvell controller can support 3D NAND, so we hope to soon see an even faster product using 3D MLC NAND. The steady-state performance of the M8Pe is also a credit to Plextor's custom firmware development, providing substantially higher performance and consistency than Toshiba delivered with the OCZ RD400 that uses the same NAND and a controller with comparable capabilities.

  128GB 250-256GB 400-512GB 1TB 2TB
Samsung 960 EVO (MSRP)   $129.88 (52¢/GB) $249.99 (50¢/GB) $479.99 (48¢/GB)  
Samsung 960 Pro (MSRP)     $329.99 (64¢/GB) $629.99 (62¢/GB) $1299.99 (63¢/GB)
Samsung 950 Pro   $196.90 (77¢/GB) $339.99 (66¢/GB)    
Toshiba OCZ RD400A $126.71 (99¢/GB) $215.76 (84¢/GB) $311.72 (61¢/GB) $729.99 (71¢/GB)  
Toshiba OCZ RD400 M.2 Out of stock $149.99 (59¢/GB) $279.47 (55¢/GB) $809.44 (79¢/GB)  
Intel SSD 600p $50.99 (40¢/GB) $80.99 (32¢/GB) $195.00 (38¢/GB) $386.80 (38¢/GB)  
Intel SSD 750     $349.99 (87¢/GB) $998.99 (83¢/GB)  
Plextor M8PeY
(AIC w./ heatsink)
$119.99 (94¢/GB) $179.99 (70¢/GB) $311.50 (61¢/GB) Out of stock  
Plextor M8PeG
(M.2 w./heatspreader)
$100.25 (78¢/GB) Out of stock $298.29 (58¢/GB) $649.99 (63¢/GB)  
Plextor M8PeGN
(bare M.2)
$84.95 (66¢/GB) $163.16 (64¢/GB) $249.99 (49¢/GB) $516.57 (51¢/GB)  

At the moment, Samsung's 960 Pro and EVO are still only available as pre-orders, and several other PCIe SSDs have limited availability. This makes price comparisons tricky, but the general trend seems to be that the Plextor M8PeGN is slightly cheaper than the Toshiba OCZ RD400. This also puts it right around the MSRP for the Samsung 960 EVO. When it becomes available and assuming prices don't shift dramatically, the 960 EVO will be the clear pick out of those three models at the 1TB capacity point: Samsung's SLC caching implementation is top notch and the 1TB 960 EVO has plenty of room to handle typical write loads. At smaller capacities, RD400 and M8Pe will have the performance advantage, especially for heavier workloads.

The big question for most users will be whether any of these PCIe SSDs are worth the price premium they carry over SATA SSDs. As compared to the Samsung 850 Pro, the M8Pe is at least 66% faster on each of our AnandTech Storage Bench tests. With the 850 Pro pricing around 42¢/GB, the PCIe SSD offers quite a bit more performance for the money. The comparison against more mainstream SATA SSDs like the 850 EVO is not as easy. At about 33¢/GB, the 850 EVO is just over half the price and the M8Pe can't always deliver twice the performance. It's even less often that the performance of the M8Pe would feel twice as fast, since it's hard to improve on something that already feels instantaneous. Ultimately, the SSD market has broadened to the point that there's nothing close to a one size fits all recommendation, but for now the Plextor M8Pe is one of several reasonable high-end options.

ATTO, AS-SSD & Idle Power Consumption
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  • The_Assimilator - Wednesday, December 14, 2016 - link

    Conclusion page: the paragraph "The performance differences between the Plextor M8Pe and the Toshiba OCZ RD400..." is repeated. BRO DO YOU EVEN EDITOR?
  • Billy Tallis - Wednesday, December 14, 2016 - link

    I think the problem may have been too much editor. My browser was getting really laggy and unresponsive while I was finishing up the article and rearranging things.
  • Threnx - Friday, December 16, 2016 - link

    Whoa there are still readers here? hah, I was cleaning out my bookmarks and saw anandtech. You realize all the talent left ages ago right? This site is dead. They're just riding on the name now...
  • cbrownx88 - Friday, December 16, 2016 - link

    @Threnx - where do you go now since Anandtech is a shell of its former glory?
  • TemjinGold - Wednesday, December 14, 2016 - link

    So... it basically loses across the board to the EVO but they want to charge more for it?
  • Billy Tallis - Wednesday, December 14, 2016 - link

    Keep in mind that the 960 EVO results here are for the 1TB model, and that kind of capacity advantage usually brings some performance advantage, too. But yeah, once the 960 EVO is actually shipping in volume, a lot of prices will probably have to come down. Unless the 960 EVO price goes up.
  • close - Wednesday, December 14, 2016 - link

    Prices for Samsung SSDs are rising due to the NAND shortage. If Plextor manages to resist this trend they might do well. After all most current workloads don't need anywhere near that kind of level of performance so a slight performance disadvantage is tolerable as long as it's reflected in the price.
  • BrokenCrayons - Wednesday, December 14, 2016 - link

    I wasn't aware of a NAND shortage. Do you happen to know the cause?
  • Samus - Wednesday, December 14, 2016 - link

    It's simply a supply and demand issue. Other causes are manufacturing process adjustments and lower yield issues often associated with transitioning to new processes.

    However, the shortage isn't as dire as 'close' makes it seem. Drive prices aren't necessarily increasing because of the shortage, but they aren't falling as they should be with the density improvements associated with TLC and widespread adoption of 3D VNAND. Samsung drives are increasing in price because vendors have noticed sharper demand for them than other drive, and I'm sure you can guess why based on this article alone...I'm not a Samsung fan, but they are currently the most balanced SSD products on the consumer market.
  • BrokenCrayons - Wednesday, December 14, 2016 - link

    Ah that makes sense. Thanks!

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