OCC has published a review on the G.SKILL Eco Series PC3 12800 2x2GB

This looked really promising, so I kept moving the volts up and finally had to adjust the TRCD setting to 9, reaching 1946MHz with the timings set to 6-9-6-24 with 1.55 volts, still far from the Intel specified max of 1.65 volts. At this point, I was pretty stoked and figured 1.55 was good so 1.60v should do better. Unfortunately, Memtest stability could not be reached, so I left well enough alone and did not even try to boot into Windows. CAS 6 at almost 2000MHz with 1.5 volts! Not too shabby for a $130 set of modules.

G.SKILL Eco Series PC3 12800 2x2GB Review