Hi, sorry for being a bit lazy and not trawling through the 390 pages, did a search only only a couple of mentions but nothing starting whether it works well. Buy Amazon has an offer on the WD_Black SN850, just wondering if this will work ok with my MacBook Pro 13” Early 2015. The first page just a say WD_Black v1, v2 & v3??
CORRECTIONS WELCOMED, ALL ERRORS ABOVE ARE MINE, USE AT YOUR OWN RISK... etc.
I think WD Black v3 = SN850. Not 100% sure, it might also be the SN750 (the full-fat version, not the SN750 SE).
The SN850 is almost certainly way too much drive for this application. I believe that max read/write capability for your computer is 1500 MB/s, whereas the SN850 is a top-of-the-line 7000 MB/s drive.
From a speed standpoint, you need a Toyota Corolla or a Honda Civic, whereas the SN850 is a Ferrari. This is an opportunity to get a quality lower-cost drive because you for sure are leaving money on the table if you use the SN850.
A things to consider when you are thinking about NVME drives and Macbook Pro/Air retrofits, beyond just whether they will work. These were nonobvious to me, but over the last week or so I have become enlightened:
(1) Power consumption. NVME drives power consumption is actively managed by Windows systems and that doesn't come standard in MacOS. There have been a lot of unhappy experiences with folks finding their computers draining the batteries by (it seems to me) ~20% overnight. Some have even ripped out the NVME and gone back to their old Apple drives.
There are two ways to handle this.
(1.a) Choose a drive that sips power, even when unmanaged. Based on reading the 390 pages of posts, the two I have noticed that fit that category are the Kingston A2000 (there may be others, I am not claiming this is a comprehensive statement) and the SK Hynix P31. iKalamaZoo wrote about her experiences with the A2000 here:
Performance Report For those who as thinking about what NVMe to buy in order to get a good battery usage for daily use and a decent read/write speed to work with at least 2x Apple original SSD performance Kingston A2000 1TB SA2000M8/1000G Without Thermal Pad NO KERNEL PANIC AT ALL Perform a...
forums.macrumors.com
(she replies to enquiries in the course of the next few posts - it's very complete and worth reading).
She ran the A2000 without any further mods to her OS, and has had a good experience. The one thing that gives me pause, however, is the read/write times on her drive, which are slow.
The SK Hynix P31 is widely lauded for its exceptionally low power consumption. Vince22 wrote of his experiences here:
after a week of Monterey Beta 3, no spotlight indexing, no Lilu and NVMefix kext loaded, only ssdpmEnabler installed, this Hynix P31-gold really shines in speed and very low power idle consumption on my Early 2015 13" Macbook Pro.
forums.macrumors.com
He got a lot higher disk read/write speed - close to the theoretical max for his computer, I believe.
(1.b) apply a kernel extension ("kext") that gives your MacOS the NVME power management it otherwise lacks. Folks have had a lot (but not uniform) success with this. A list of working models and the reduction is here:
Contribute to kvic-z/SsdPmEnabler development by creating an account on GitHub.
github.com
The kext in question is called SsdPmEnabler. How to install this is beyond the scope of this post - I haven't done it myself yet. You can start reading about it here:
Contribute to kvic-z/SsdPmEnabler development by creating an account on GitHub.
github.com
There are a couple of Mac models for which SsdPmEnabler won't work.
(2) DRAM vs DRAM-less NVMEs. NVMEs get a lot of their write speed by having fast DRAM to maintain (while operating) a lookup table for the data contained in the drive, usually at a ratio of about 1 byte of DRAM for every Kb of NVME NAND memory. To reduce the cost of NVMEs and make them more compact, a lot of cheaper drives have come out recently with DRAM-less designs.
Instead, many of them rely on using Host Memory Buffers - basically, the NVME drive carves out a small section of computer main memory for itself. Of course, this has to be enabled by the OS, and my understanding is that it's not in MacOS. So, my takeaway is that you want a drive that has it's own DRAM, but that said, I've seen OK (but not exceptional) write speeds quoted for Macs retrofitted with drives that I know are DRAM-less.
Still, a DRAM drive is on my personal checklist.
(3) TLC (or MLC) vs QLC. QLC NVME drives are cheaper because they fit more memory into less space, but QLC drives are also less durable. All NVME drives will ultimately die - you can only rewrite to memory so many times. QLC drives die faster than TLC drives. It wouldn't surprise me if, over time, semi conductor engineers figure out how to make QLC more durable, but it's not yet the case. So for me, TLC (or MLC) is still on my checklist.
Here's a list, maintained by a subreddit, of NVMEs and their characteristics. It's not fully comprehensive, but it's pretty wide:
docs.google.com
maintained by:
https://www.reddit.com/r/buildapcsales/
(that subreddit is public and it does routinely provide a link to this list, so I feel OK sharing it).
Anyway, I am on the verge of upgrading a MBP 11,1 and a MBP 11,4 using the info in this thread, so I did a deep-ish dive into this stuff.
Based on what I know, I am at this point about 90% sure that I'll go with a SK Hynix P31 for both of them. It's a bit too much drive (in terms of speed) for the 11,1 (but still has the advantage of being low power) but I think just about right for the 11,4, which has a theoretical read/write maximum of about 3000 MB/s. Note that I have a Windows machine too, which is important because you need to install a firmware update on the P31 which I think is easier to do (perhaps is required to be done) on a Windows box.
So far in this Black Friday season, the cheapest for this drive is Amazon with a 15% off coupon on a list of $130 for the 1 TB. We'll see if that gets better once the true BF craziness starts tomorrow.
On the subject of adapters, the one everyone swears by is the Sintech:
NOTICE:because too many customers can use it,I suggest you to try it again if your MAC can't detect nVME SSD. Pls notice to insert card fully into SSD slot and you must prepare bootable USB disk(see third point) with High Sierra to format M.2 SSD first, it can't support recover from internet. mai...
www.amazon.com
sintech Electronic shop
eshop.sintech.cn
There's zero intelligence in these adapters. They simply map the standard NVME pins to the pins of the Apple socket. Yeah, all this time, Apple could have just used a standard m.2 socket but they chose not to. To the extent that some adapters work and others don't, it appears to be simple electrical arcing or other stray signals. People have had a lot of success with the Sintech in this regard.
You'll also need a pentalobe screwdriver and Torx T5 screwdriver to get into the Mac and to remove the screw holding in the device.
It's also worth looking at Youtube videos of people doing this, to get a sense of what's involved, if you've never gone into a machine yourself. For instance:
But there's also some bad info in some of these. For instance, Luke Miani has a very successful Mac-oriented channel, and he does an upgrade video here:
But he says some things that are wrong - for instance, that any NVME drive will work. Nope, definitely not true.
Watch some others as well - there are a number of ways to do the necessary software re-install, it appears. I think you'll want a version of MacOS on a bootable USB drive, but I've seen other installs that don't go this route.
ONE LAST THING - if you are still receiving operating system upgrades from Apple, you'll want to keep your original Apple SSD because some upgrades try to install a firmware upgrade for the SSD, and if it doesn't find an Apple drive, the whole install fails. So, yeah, thanks Apple. So you might need to re-install the original SSD to get a future MacOS upgrade - such is my understanding.
ONE LAST LAST THING - if you open up your Mac, you may as well give it a clean (if you find a lot of dust in there, and you probably will), particularly the fans (to make sure you keep the air flowing) and re-do the thermal paste, which by now has probably lost its efficacy, if it's never been changed since birth. There are many videos on how to do these things.
Happy Black Friday to all...