Performance Comparisons – Sequential and Random
The 970 PRO is faster than its predecessor, but for burst writes can't match the SLC cached write speeds of the 970 EVO 500GB and 1TB models. Do note that at QD2 and up, the WD Black still cleans house for sequential writes.
The 970 PRO offers impressive gains over the 960 PRO, especially at lower QD.
NAND SSDs are surprisingly fast at low QD random writes. This is for a few reasons. To explain better, let's review what happens when a typical NAND-flash SSD writes or reads:
- Writes: Host sends data to SSD. SSD receives data and acknowledges the IO. SSD then passes that data onto the flash for writing. All necessary metadata / FTL table updates take place.
- Reads: Host requests data from SSD. SSD controller looks up data location in FTL, addresses and reads data from the appropriate flash dies, and finally replies to the host with the data, completing the IO.
The 960 SSDs are the green-overlapped-orange lines running near the bottom of the pack. The WD Black was impressive at the time, but the newer 970 products make an impressive jump in performance here.
…and now we flip the script. Random reads require all of the work to be done before the IO can be completed, and the limit here at the more critical lower queue depths is NAND's read response time. NAND is the storage medium of all SSDs in this comparison, so we find them all starting at a similar range, with the ramp determined more by how many parallel flash dies are present.
For this chart, I've zoomed in a bit and shifted to a log scale so we can more clearly see the spread. It's still a close race, but the two PRO series drives clearly dominate over the rest of the pack. These differences are more clearly seen as we get into our QD weighted comparisons (next page, please).
$.10 per GB or GTFO
$.10 per GB or GTFO
It’s hard to take comments
It’s hard to take comments like yours seriously.
People considered $1.00/GB a breakthrough affordability price point right up until it was reached. Then people considered it offensively expensive and said $0.50/GB was the affordability point. We passed that point as well and much the same thing occurred.
Now here we are with people complaining that disks are not $0.10/GB. If this new disk -were- that cheap, I suspect that you’d be complaining that it’s not $0.05/GB. Please recognize that you’re unlikely to ever be satisfied at any price point. Setting realistic expectations goes a long way toward fulfillment.
In the OP’s defense, $0.10/GB
In the OP's defense, $0.10/GB is a bit of a running joke on our podcast. Ryan want's it to happen yesterday, and I keep reminding him that we're just not there yet.
If not yesterday, how about
If not yesterday, how about tomorrow? 🙂
haha, glad someone got the
haha, glad someone got the reference.
I think this is not limited to just Ryan wanting it to be $.10/GB, I am pretty sure everyone wants that(by everyone, I mean customers).
So, 970 series is slightly
So, 970 series is slightly better than the 960 series. That’s what I got from this review.
Nothing escapes you
/s
Nothing escapes you
/s
That’s pretty much it.
That's pretty much it.
LOL @ prices.
LOL @ prices.
Some misinformation going on
Some misinformation going on here. IEEE1667 finally made it to the Samsung 960 EVO and Pro with the latest firmware. Or actually, the two latest in terms of the Pro but the previous got pulled.
The sad thing is that Samsung keeps complaining about UEFI firmware issues with most motherboards making it impossible to get IEEE1667/Microft Edrive to work with the 960 EVO and Pro as boot drives which is likely what they are being used as 99% of the time.
It’s not working with neither my Asus Maximus IX Apex or my Asus Maximus X Apex both running the latest BIOS/UEFI Firmware version and when contacting Asus about the problem they claim they don’t know anything about such a issue.
It works perfectly when the drive is being used as a secondary drive. So there seems to be something going on with the NVMe module in the UEFI firmware and how it loads in terms of Windows 10.
The big question is.. How does this all work with these new drives? Do they magically work without a UEFI Firmware fix like Samsung keeps claiming is needed for the 960 EVO and Pro and if so how is it that these new ones don’t require the same fix from motherboard manufactures?
Hopefully PC-Per and others can do some digging here.
Seems to be an issue with the
Seems to be an issue with the BIOS chipset manufacturers like Megatrends, Phoenix, etc, and Samsung has stated they are working with them to resolve the issue.
I consider IEEE1667 broken
I consider IEEE1667 broken for 960 until the community reports that it is working (especially after the firmware back and forths). Same goes for the 970. I'm taking Samsung at their word for this launch, but that will change if the community feedback is the same as it was for the 960. We have a limited sample size of systems that it may or may not work on, so this particular niche use case is better left to those more experienced in using it.
Would like to see a test
Would like to see a test measuring write speed using full disk encryption. The results would probably be similar to the saturated write on a full drive, but given that this is not an unusual setup these days, it might be interesting.
Modern SSDs encrypt to the
Modern SSDs encrypt to the disk regardless. Enabling encryption at the host level just changes the key.
Page “Performance Focus –
Page “Performance Focus – Samsung 970 EVO 250GB, 500GB, 1TB”, under sequential 250GB graph reads “1TB shows a cached (burst) write speed of 1.5GB/s, with sustained (saturated) writes falling off to ~300MB/s.”.
Probably needs to be changed to “250GB shows a cached […]”.
Thanks for the catch. Fixed!
Thanks for the catch. Fixed!
Im a little disappointed you
Im a little disappointed you guys weren’t able to do the same with the new WD Black . For friends,family, and myself i usually dont go higher than purchasing the 250GB. I then always use for storage a regular HDD. I see that the 1TB is on here , i already purchased the WD 250 and installed it last week. Would been cool to see both the WD 250GB VS the new Evo 250GB since there price the same. Like a budget to budget which should you get kinda deal since the better performance is usually is seen on the high capacity drives which is what was tested.
Were you able to use WD Black
Were you able to use WD Black 250 GB as a Windows 10 boot drive?
That was all we were sampled.
That was all we were sampled. I did ask for lower capacities…
What was the NVME driver
What was the NVME driver version used? Tom’s claims to get lower perf on the newest 1.3 drivers.
We used Samsung 3.0 drivers.
We used Samsung 3.0 drivers.
$0.01 per GB or GT*O
/s
$0.01 per GB or GT*O
/s
Any chances of a HP EX920
Any chances of a HP EX920 review? A few reviewers actually put it slightly faster than the 970 EVO at some tasks, especially real world testing and low queue depths all the while being much cheaper.
Allyn, I love how hyped you
Allyn, I love how hyped you are on storage, it’s ridiculous and awesome! I will not purchase a drive without it getting your “Editor’s Choice” stamp. ( my own money, sometime server budgets say otherwise ) Keep it up man!
Yes, we will soon be
Yes, we will soon be crowd-funding a prototype that will clone multiple copies of Allyn Malventano, for exclusive competitions against AI robots falsely claiming comparable knowledge, experience and analytical capabilities — kinda like famous chess matches with Russian masters of times past. My money is on Allyn (and clones), every time!
Hi guys, really appreciate
Hi guys, really appreciate your work. It would be really interesting to compare Samsung 970 with Seagate Nytro 3730 SSD Dual 12 Gb/s SAS 3D eMLC 400gb. Maybe in raid combination too. Just a thought that tickle senses. 🙂 Keep up the good work.
Alan, money no object someone
Alan, money no object someone is giving you a SSD for free. What do you choose Optane P900 or 970 Pro?
Money no object, I’d probably
Money no object, I'd probably do the 900P, but only in a >480GB capacity and if I had a spare slot to support it. M.2 is way more convenient for client storage.
Great review. Thank you for
Great review. Thank you for the context on scenarios wrt write speed after fast write. It shaped my purchasing decision. I always check w pcper Allyn before making a storage decision! I’m going to try one of these puppies on my trusty Z77 board which actually has an NVMe UEFI for M.2 boot. I’ll post results re: IEEE1667.
So, Allyn, upgrading from a
So, Allyn, upgrading from a 950pro 256 to a 970evo 1 gig much of an improvement besides the capacity? I have 3 950 pros in a soc force Mobo.