In previous blog posts about the Lenovo Y700 where we added a high performance NVMe SSD in my case a Samsung 950 pro, others have since added Samsung 960 evo's and pro's. The draw back was that performance was capped at ~1600MB/s which leaves a fair amount of performance unavailable on these high performance SSD's. The issue was tracked down the DMI link speed being set to PCIe 2.0 speeds, this was what was causing the performance cap or around 1600MB.
After Lenovo refused to change the setting, their is finally a work around to set the DMI link to full speed (PCIe 3.0) this fully unlocks the performance for these SSD's. Thanks to our friends over at MDL.
The unleashed performance of the 950 Pro 256GB (rated at 2200MB read 900MB write)
The 960 PRO and 960 EVO SSDs will be available worldwide starting October 2016, with manufacturer’s suggested retail prices starting at $329.99 and $129.99 USD respectively.
Performance of high speed NVMe PCIe 3.0 x4 SSD is capped at ~1600MB/s when installed in the Lenovo Y700 Laptop.
I just received my new Lenovo Y700, First thing was to open it up and install a new Samsung 950 Pro SSD in the available M.2 slot. The advantage of buying without the SSD is you don't end up with the PM951 with terrible write speeds or the CV1 M.2 Series again with not that great write speeds. The 1TB slim HDD is left in place for storage.