Is Lenovo still messing with drive speeds?

My new Yoga 12 has a PM851, which I understand to be the OEM 850 Pro.

However, the write speeds with ATTO and Crystal both show it being stuck at 250MB/s, while reads are in the 500s where I'd expect them.

Those writes are really low, and I'm not sure if it's Lenovo limiting me on the SSD or on the laptop itself. With their artificially limiting the T61's SATA speeds, I figure it's worth asking.


For what it's worth: I just tested a work Yoga 12 with an intel 180: write stuck at 210MB/s. Yoga S1 with whatever 128GB drive they used: 135MB/S write. Reads are in the 400s where they should be for both.

 

As far as I remember, the Samsung PM851 isn't the OEM version of the 850 Pro, but the OEM version of the 840 Evo.

 

Well, it wouldn't be the first time I've been lied to by the internet. Give than it's a 256 instead of the 250 the EVOs came in, I figured that those that said it was an 850 Pro were correct.

Even if it is just an OEM 840 EVO, it's still really low. The retail 120GB 840 EVO in my desktop has 500MB/s reads and writes.

I put a retail 850 EVO in there, and I had write speeds back where they belonged. I think it's a limitation of the OEM drives Lenovo is putting out. I've had tons of PM841 drives from Dells that gave the same speeds as the 840 Pros.

I'll just leave the 850 EVO in there, and sell off the PM851.