[M] Silicon Power P34A60 PCIe 3x4 M.2 2280 512GB SSD Review
 

The mainstream PCIe Gen 3x4 P34A60 mainstream SSD from Silicon Power does offer good all-around performance and does not drop to very slow speeds when the cache fills up completely, as we could notice from the HD Tune Pro write test. When copying large files continuously to the drive, we haven’t seen drops of under 90MB/s, which is great for a TLC-based drive, while the 512GB capacity should be enough for a boot drive.

http://www.madshrimps.be/articles/article/1001204/