Summary: Purchased this set on sale for $60.00. Looks great in my case and is low profile so my Coolermaster 212 Evo heat sink will fit. Great memory for a great price. My specs: Case | NZXT Guardian 921 RED LED PSU | Corsair CX Series 750 Watt / Modular MB | GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX Memory | HyperX 8GB Kit (2x4GB) 1600MHz CPU | AMD FD8350FRHKBOX FX-8350 FX-Series 8-Core Black Edition SSD | Samsung Electronics 840 EVO-Series 120GB Graphics | Sapphire R9 270X 4GB OC
Summary: I didn't notice the voltage rating of the memory was 1.65, and when I did it was already too late to return. I was afraid it wouldn't work out of the box without enabling XMP first, but even with XMP disabled it is still running at 1600MHz. My mobo is a MSI Z87M GAMING and CPU is Intel Core i5 4670k. Great and cheap, definitely recommend.
Summary: It says on the product page that it only does 1.65v but the truth is it's 1600MHz memory without having to pump extra voltage - there's SPD profiles for DDR3-1333 and DDR3-1600 and then XMP for DDR3-1600 at tighter latencies, which uses the 1.65v. I can't really tell a difference between CAS9 and CAS11, so I am just using the standard default DDR3-1600 SPD profile in my system. Still, it's cheap and can be super low-latency if that's your bag.