VR Zone has details about Intel's upcoming SSD 520 "Cherryville", you can read it over here.
The SSD 520 "Cherryville" family is slated for this November, the 4th of November to be precise. That is when one can expect market-availability. The second important bit of information is that SSD 520 is poised to displace the SSD 510 "Elmcrest" series, that's currently out in the market, available at 120 GB and 250 GB capacities.
SSD 520 series, according to fresh information, is built around the idea of providing more capacity choices to the consumer, higher throughput, and lower latencies, compared to SSD 510 series. The new SSD 520 series will be available in capacities as high as 480 GB and as low as 60 GB; provide trasfer rates of 520 MB/s sequential read, 500 MB/s sequential writes (compared to 500/315 MB/s on SSD 510), and 40,000 IOPS read/write 4K random access throughput.