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bcomer

macrumors regular
Original poster
Jan 25, 2008
205
145
Ottawa
Tonight I bought a Corsair MP600 2TB M.2 SSD and Orico NVME M.2 Expansion card.

Mounted the SSD then plugged the board into my MP 7,1 and everything worked.

BlackMagic reports 3113.6 write and 2948.4 read equals a happy customer.
 
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Superficially - this sounds glorious - but I've only found one* m2 PCIe SSD (SS 970 PRO) that maintains 3000 MB/s after the first 30 - 40 seconds. The worst part is that they drop down to levels that are the equivalent of SSUAX (or PCIe 2.0 x2) transfer speeds (about 690 - 770MB/s).

Test results like this remind me of the VW scandal where the diesel engines were rigged to perform a certain way diagnostically when the engine emissions were being tested and awarded with gold medals from the green olympics committee.


Please test your MP600 again and transfer a 400GB folder from Disk A to Disk B. I suspect you can't for reasons that become obvious as I continue to write..... [you would need another MP600 as the target drive]..

Anyway - I'm genuinely interested to know of a PCIe SSD where the sustained transfer speeds don't fall off a cliff. The invitation to 'recommend' is open to every one here - those Samsung 970 PRO NVMe SSDs are twice the price of all the others on the market - we need a decent alternative!
 
What temp do you have on the ssd? I used to have a EVO 1TB on a Lycom adapter with passive cooling and got about 50°C. Now I have a Sonnet 4x4 and the temp went down to 30°C. I think the Sonnet is the much better solution IMHO.
 
From what I understand up to this point - the speed doesn't drop because of thermal throttling. It drops because of the VW trick - the disk flash memory 'cache' fills in 30 secs and then it bottlenecks and falls of a cliff.

I've got my disks in an iocrest syba adapter which provides ample cooling :)
 
Real world test:
DISK TO DISK.. 186GB in 80 seconds.. the disks used in this test are Samsung 970 Pro 512GB (x2)....

They are too expensive but at least they work!

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