Analysis and Conclusion
In both AS-SSD and CrystalDiskMark, the Kingston HyperX 120GB SSD had respectable performance. With a sequential read of around 450MB/s given the claimed maximum of 555MB/s this is a quite noticeable difference, although the difference between the box speed and actual performance on the write speeds was quite jarring.
In PCMark8, the results were good with respectable scores being returned in all application opening tests, but a lower than expected result was returned in the overall bandwidth result. This returned result was still higher than in CrystalDisk and AS-SSD, but as can be seen real world performance is a far cry from the box advertised speeds.
Taking the PCMark 8 results as more indicative of real world performance as well as the results of my own use of the drive as a primary unit the Kingston HyperX 120GB 3K SSD was exceptionally solid. Boot times were quick and loading apps similarly so.
The only issue I have is its price, retailing for around 65 pounds it is priced higher than some of its competition, thankfully though if you are transitioning and want to keep data, the appeal of the software and external caddy makes it a better choice.