Anyone else just noticed that Samsung released the 860 EVO M.2? The specs say this is a SATA drive, I'm wondering if this uses the same high speed AHCI interface that's on the SM951? I'm eyeballing the 2TB model for my Mac Pro 2012.
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Samsung 860 EVO M.2
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May be you miss read the model number, OP is asking about the 860 Evo, not the 960 Evo.
The newly announced 860 Evo is a SATA SSD, available in 2.5", mSATA, and m.2 2280 form factor.
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NO, m.2 is the form factor, nothing to do with the interface standard. The 860 Evo is a SATA SSD, its max speed is about 560MB/s, not even close to a SM951 can deliver.
Shoot. What is the largest PCIe AHCI drive? I currently have a SM951 AHCI 512GB, it's great but I've run out of space and I have no more free PCIe slots.
What's your budget?
If you replace your current PCIe drive, you could go at least 8TB with an Apricorn Velocity Duo X2 and two 4TB SSDs, but there are likely much more economical upgrades than that...
AFAIK, the 1TB XP941 is the highest capacity PCIe AHCI SSD that fit the cMP. However, in general, go for the Kingston 960GB HyperX Predator make more sense.
If you want 2TB AHCI PCIe SSD storage, and budget is not limiting. This 4x SM951 setup is the way to go (only one PCIe slot is required). And the good news is you already have one SM951, so no need to "waste" it.
https://forums.macrumors.com/threads/amfeltec-x16-pcie-with-4-ssds-5900-mb-s.1936311/
For low cost 2TB SSD option, SATA is much much cheaper. If you really need more speed, you may consider RAID two (or even four) SATA SSD together, to get a single fast + high capacity partition.
Since you said you are running out of PICe slot. May I know why you need another fast + high capacity SSD? I am thinking if it's OK for you to put the OS on a 2.5" SATA SSD, connect it just to the native SATA II port (it won't affect the OS operation speed). And use the whole 512GB on the SM951 for high demanding work. "Replace" the SM951 with another larger AHCI SSD sounds like a big waste.
If you want 2TB AHCI PCIe SSD storage, and budget is not limiting. This 4x SM951 setup is the way to go (only one PCIe slot is required). And the good news is you already have one SM951, so no need to "waste" it.
https://forums.macrumors.com/threads/amfeltec-x16-pcie-with-4-ssds-5900-mb-s.1936311/
For low cost 2TB SSD option, SATA is much much cheaper. If you really need more speed, you may consider RAID two (or even four) SATA SSD together, to get a single fast + high capacity partition.
Since you said you are running out of PICe slot. May I know why you need another fast + high capacity SSD? I am thinking if it's OK for you to put the OS on a 2.5" SATA SSD, connect it just to the native SATA II port (it won't affect the OS operation speed). And use the whole 512GB on the SM951 for high demanding work. "Replace" the SM951 with another larger AHCI SSD sounds like a big waste.
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You'd need an adapter like this (https://www.amazon.com/dp/B00MYCQP38), but not 100% sure it's the correct version. Recall there possibly being a special pin connection on the original SM951's Apple used in the early versions of the MBP?
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Thanks bsbeamer for your answer. In fact I would like to understand if it is 100% compatible with the adapter.
We await other friends if they can take away this doubt.
Thank you.
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thank you Kris Kelvin, what is the code that identifies the AHCI version?
I remember seeing it written here in the forum but I do not remember which post.
Can you tell me please?
Thank you.