Let's start with the most important part right away. £42 for a 8GB DDR3-2133 memory kit is very cheap, and you can even find it for £36. That's more than reason enough to take a closer look at the Kingston Predator 8GB DDR3-2133 CL11 kit, to see how fast it is.
The Predator DDR3-2133 CL11 modules are based on Hynix H5TC2G83CFR PBA memory chips. It's likely the reason for the low price, as many other DDR3-2133 memory kits are based on the more expensive Samsung chips. Kingston claims the modules run at 1,066MHz (DDR3-2133) with a CAS latency of 11V and 1.6V. The modules have an XMP profile with these values and 11-12-11-30-49-T2 timings. For motherboards that do not support DDR3-2133 there is also a DDR3-1600 CL9 XMP profile.
The modules are equipped with a relatively tall heatspreader (5.4cm) with cooling ribs. Whether this has any effect on the temperature is doubtful, but visually they're striking. You do have to make sure they don't obstruct other components on your motherboard.
We tested the three Crucial kits the same way we tested the modules in our recent Ivy Bridge memory round-up.
Our test system consists of a Core i7 3770K processor on an ASUS P8Z77-V Deluxe motherboard. We validated whether the modules had the correct XMP information and whether they ran well at the indicated clock speeds. Then we tried to overclock them as far as possible. First we used the standard timings and the standard voltage, according to the XMP values.
Then we raised the voltage to 1.7V to find out if we could push the modules further, and lastly we attempted 1.7V together with 11-13-13 timings. We ran MaxxMEM² and Sisoft Sandra 2012 memory benchmarks on all configurations. You can read the rest of Kingston HyperX Predator 8GB DDR3-2133 CL11 kit preview on Hardware.info.