The Intel Optane SSD 800p (58GB & 118GB) Review: Almost The Right Size
by Billy Tallis on March 8, 2018 5:15 PM ESTPower Management
Real-world client storage workloads leave SSDs idle most of the time, so the active power measurements presented earlier in this review only account for a small part of what determines a drive's suitability for battery-powered use. Especially under light use, the power efficiency of a SSD is determined mostly be how well it can save power when idle.
SATA SSDs are tested with SATA link power management disabled to measure their active idle power draw, and with it enabled for the deeper idle power consumption score and the idle wake-up latency test. Our testbed, like any ordinary desktop system, cannot trigger the deepest DevSleep idle state.
Idle power management for NVMe SSDs is far more complicated than for SATA SSDs. NVMe SSDs can support several different idle power states, and through the Autonomous Power State Transition (APST) feature the operating system can set a drive's policy for when to drop down to a lower power state. There is typically a tradeoff in that lower-power states take longer to enter and wake up from, so the choice about what power states to use may differ for desktop and notebooks.
We report two idle power measurements. Active idle is representative of a typical desktop, where none of the advanced PCIe link or NVMe power saving features are enabled and the drive is immediately ready to process new commands. The idle power consumption metric is measured with PCIe Active State Power Management L1.2 state enabled and NVMe APST enabled.
The Optane SSD 800p has a bit of an unusual suite of power management capabilities. Previous Optane products have not implemented any low-power sleep states, giving them quite high idle power consumption but entirely avoiding the problem of latency waking up from a sleep state. The 800p implements a single low-power sleep state, while most NVMe SSDs that have multiple power states have at least two or three idle states with progressively lower power consumption in exchange for higher latency to enter or leave the sleep state. On the other hand, the 800p has three tiers of active power levels, so devices with strict power or thermal limits can constrain the 800p when properly configured.
Unfortunately, our usual idle power testing method didn't work with the 800p, leading it to show only a modest reduction in power rather than a reduction of multiple orders of magnitude. This may be related to the fact that the Optane SSD 800p indicates that it may take over a full second to enter its idle state. This is an unusually high entry latency, and something in our system configuration is likely preventing the 800p from fully transitioning to idle. We will continue to investigate this issue. However, based on the specifications alone, it looks like the 800p could benefit from an intermediate idle state that can be accessed more quickly.
(I should mention here that the last Intel consumer SSD we reviewed, the 760p, also initially showed poor power management on our test. We were eventually able to track this down to an artifact of our test procedure, and determined that the 760p's power management was unlikely to malfunction during real-world usage. The 760p now ranks as the NVMe SSD with the lowest idle power we've measured.)
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boeush - Thursday, March 8, 2018 - link
P.S. please pardon the "autocorrect"-induced typos... (in the year 2018, still wishing Anandtech would find a way to let us edit our posts...)Calin - Friday, March 9, 2018 - link
Unfortunately, if you already have a computer supporting only 32 GB of RAM, the 200$ for an Intel 800p is peanuts compared to what you would have to pay for a system that supports more than 128GB of RAM - both in costs of mainboard, CPU and especially RAM. I'd venture a guess of a $5,000 entry price (you might pay less for refurbished). It might very possibly be worth it, but it's still a $5k against a $200 investmentThe_Assimilator - Friday, March 9, 2018 - link
Entry-level Intel Xeon + 1U motherboard with 8x DIMM slots = ~$6008x 32GB modules for 256GB RAM total = ~$3,200
So not quite $5k, but still a lot more than $200 :)
mkaibear - Friday, March 9, 2018 - link
...plus a new case, plus a new PSU, plus a UPS...boeush - Saturday, March 10, 2018 - link
Yes, I did mention a lot of $$$...But that's the point: how badly do you really need the extreme random access performance to begin with - above and beyond what a good 1 TB SSD can deliver? Will you even be able to detect the difference? Most workloads are not of such a 'pure' synthetic-like nature, and any decent self-respecting OS will anyway cache your 'hot' files in RAM automatically for you (assuming you have sufficient RAM).
So really, to benefit from such Optane drives (at a cost 4x the equivalent-sized NAND SSD) you'd need to have a very exotic corner-case of a workload - and if you're really into such super-exotic special cases, then likely for you performance trumps cost (and you aren't going to worry so much about +/- a few $thousand here or there...)
jjj - Friday, March 9, 2018 - link
Yeah not impressive at all. They can't reach mainstream price points with higher capacity and that leads to less than stellar perf and a very limiting capacity.To some extent, the conversation should also include investing more in DRAM when building a system but that's hard to quantify.
Intel/Micron need the second gen and decent yields, would be nice if that arrives next year- just saying, it's not like they are providing much info on their plans. Gen 2 was initially scheduled for early 2017 but nobody is talking about roadmaps anymore.
jjj - Friday, March 9, 2018 - link
Just to add something, NAND prices are coming down some and perf per $ is getting better as more folks join the higher perf party. It's not gonna be trivial to compete with NAND in consumer.CheapSushi - Friday, March 9, 2018 - link
Hardware "enthusiasts" have sure become jaded, cynical, grumpy assholes.Reflex - Friday, March 9, 2018 - link
No shit. I think people are confusing their anger at Intel with whether or not this is a good tech advancement. I am wondering if they even are looking at the article I saw. The vast majority of the charts showed Optane products in the lead, power consumption lower, latency lower, etc. Only a few places showed it behind, most around scenarios that are not typical.It is fair to point out its not worth 3x the cost. I'm building a system now, not going with Optane at this price. It is fair to point out that the capacity is not there yet. That is another part of why I'm not using it. Those are valid criticisms. They are also things that are likely to be remedied very soon.
What is not fair is to bash it incessantly for reasons imagined in their own minds (OMG IT DOES NOT HIT THE NUMBERS IN A PAPER ABOUT THE POTENTIAL IN ITS FIRST GEN PRODUCTS!), or ignore the fact that we finally have a potentially great storage alternative to NAND which has a number of limitations we have run up against. This is a great thing.
Adramtech - Saturday, March 10, 2018 - link
Agreed, Reflex. In 2 years Optane Gen 2 is likely going to look a lot better and impress. Criticizing Gen 1 tech is ridiculous.