As we have previously mentioned in our review of the Plextor M6M solid state drive, it is important to remember that SSD's can come in different shapes and sizes. Not all drives are going to be the 2.5" form factor and fit perfectly into your ultra book or desktop. We spoke briefly about the mSATA form factor and that you will find it most often in a laptop, but as laptops and ultra books become slimmer, the demand for smaller, yet faster, drives increases. Bring in the native PCIe M.2 form factor. The PCIe M.2 SSD eliminates the SATA 3 bottleneck, where with SATA 3 you can expect SSD speeds around 500 MB/s, but with PCIe you can expect speeds nearly double this. Incredible isn't it? Imagine, 1GB/s and you are not even using a RAID 0 configuration; it really is astonishing. The Samsung XP941 PCIe M.2 SSD is one of, if not the fastest drive we have ever seen. Let's take a closer look!