I've bought 20 GB of these sticks over the last two years. 12GB is in my Core i7 computer, and 8GB is in my Core i5 computer. They've worked flawlessly over the last two years without any issues related to the RAM.
With my Core i7 it showed up as 1333MHz. To get it to work at 1600MHz I had to manually enter the voltages and timings - it took a little bit of fiddling and advice to get it right, but once I did it's been solid ever since.
I give the product 5/5 - the issue I mentioned with the operating frequency above was due to my motherboard's memory support. When I put this memory in my Core i5 with a much newer motherboard, it instantly shows up as 1600MHz - you just have to enable XMP in the BIOS.
| Brand | G.SKILL |
|---|---|
| Product Dimensions | 3.2 x 13.92 x 0.67 cm; 60 Grams |
| Item model number | F3-12800CL9D-4GBNQ |
| Manufacturer | G.Skill |
| RAM Size | 4 GB |
| Computer Memory Type | DDR3 SDRAM |
| Memory Clock Speed | 2666 MHz |
| Voltage | 1.5 Volts |
| Are Batteries Included | No |
| Item Weight | 60 g |