Podcast #477 - Cord Cutting, Holiday Gift Guide, and more!

Subject: General Tech | November 30, 2017 - 02:38 PM |
Tagged: Z-NAND, video, Samsun, powercolor, podcast, InWin 301, holiday guide, HAVIT HV-KB395L, GIGABYTE AX370, Corsair HS50, Corsair Crystal 460X, cord cutting, Console Frame Rating

PC Perspective Podcast #477 - 11/30/17

Join us for discussion on Cord Cutting, Holiday Gift Guide, and more!

You can subscribe to us through iTunes and you can still access it directly through the RSS page HERE.

The URL for the podcast is: http://pcper.com/podcast - Share with your friends!

Hosts: Ryan Shrout, Josh Walrath, Jeremy Hellstrom, Allyn Malventano

Peanut Gallery: Alex Lustenberg, Ken Addison

Program length: 1:22:41

Podcast topics of discussion:
  1. Week in Review:
  2. News items of interest:
  3. Closing/outro

Source:

Samsung SZ985 Z-NAND SSD - Upcoming Competition for Intel's P4800X?

Subject: Storage | November 20, 2017 - 10:56 PM |
Tagged: Z-NAND, SZ985, slc, Samsung, P4800X, nand, Intel, flash

We haven't heard much about Samsung's 'XPoint Killer' Z-NAND since Flash Memory Summit 2017, but now we have a bit more to go on:

z-nand specs.png

Yes, actual specs. In print. Not bad either, considering the Samsung SZ985 appears to offer a bus-saturating 3.2GB/s for reads and writes. The 30 DWPD figure matches Intel's P4800X, which is impressive given Samsung's part operates on flash derived from their V-NAND line (but operating in a different mode). The most important figures here are latency, so let's focus there for a bit:

bridging the gap samsung z-nand.png

While the SZ985 runs at ~1/3rd the latency of Samsung's own NAND SSDs, it has roughly double the latency of the P4800X. For the moment that is actually not as bad as it seems as it takes a fair amount of platform optimization to see the full performance benefits of optane, and operating slightly higher on the latency spectrum helps negate the negative impacts of incorrectly optimized platforms:

02 - IRQ service time penalty.png

Source: Shrout Research

As you can see above, operating at slightly higher latencies, while netting lower overall performance, does lessen the sting of platform induced IRQ latency penalties.

170808-120245.jpg

Now to discuss costs. While we don't have any hard figures, we do have the above slide from FMS 2017, where Samsung stressed that they are trying to get the costs of Z-NAND down while keeping latencies as low as possible.

z-nand.jpg

Image Source: ExtremeTech

Samsung backed up their performance claims with a Technology Brief (available here), which showed decent performance gains and cited use cases paralleling those we've seen used by Intel. The takeaway here is that Samsung *may* be able to compete with the Intel P4800X in a similar performance bracket - not matching the performance but perhaps beating it on cost. The big gotcha is that we have yet to see a single Samsung NVMe Enterprise SSD come through our labs for testing, or anywhere on the market for that matter, so take these sorts of announcements with a grain of salt until we see these products gain broader adoption/distribution.

Source: Samsung