Intel controller algorithms that deliver terrific write I/O performance on its X25-M solid state drives actually contributes to them slowing down over time. The issue is fragmentation. The Intel controller combines many small file writes, smaller than the X25-M's block size, into a single larger one thus avoiding unnecessary block erase/write cycles. To avoid the flash wearing out through repeated writes, its wear-leveling algorithm avoids concentrating writes on particular cells by re-mapping the physical cells into logical ones and progressively moving around the flash cells, such that logical flash cell zero isn't necessarily physical flash cell zero.
Check complete analysis:
Long-term performance analysis of Intel Mainstream SSDs
http://www.pcper.com/article.php?aid=669&type=expert&pid=1
Conclusion:
If you have money to spend on SSD go for 10 or 15k SAS. On Long term it will give you better performance and reliability.
e9163ea1-afbe-4f4e-99b6-799c26a47c28|5|1.8