I found a great deal on NCIX less than a week ago on a Sandisk Extreme 240GB and I decided to jump on it as fast as I could since the quantities were limited on the deal they had for it. I had only read a few reviews that put it up there as one of the highest performing SSDs. Since I’ve gotten it, I’ve cloned my old partition from a previous drive and connected it in SATA 2 at first. The results were impressive; it pretty much maxed out my SATA 2 for seq. reads/writes and everything else was at least higher than it was with my previous Intel x25-M G2 SSD.
A couple days later, though, I built my new computer, consisting of an i5 3570k and an ASRock Extreme4 Z77 motherboard. I’ve updated the drivers and everything but the write performance has been degrading ever since the first benchmarks. I’ve tried both the native Intel SATA 3 ports and the ASMedia 1061 (which gave very poor performance).
This is what my benchmarks look like right now: http://i49.tinypic.com/nz54sp.png
As you can see, we’re very far from advertised speeds. The disk is only half full, and I didn’t write much onto it other than standard Windows 7 usage and some benchmarking (no overkill on these). I also used a program called SSD Tweaker to force a TRIM command and idle’d for a good 30 to 40 minutes. The result is what you see on that screenshot. Previous to it, my reads were lower, but it didn’t improve the writes. I’m pretty disappointed and I hope this isn’t permanent.