Kingston HyperX Predator KHX28C12T2K2/8X Reviewccokeman - May 8, 2014
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Kingston HyperX Predator 2800MHz Testing:
Memory is often hard to separate from one kit to another in gaming, but when it comes to number crunching and computing, some memory provides an extra boost in comparison. To see just what kind of performance this kit has to offer, I will be running the modules through a series of benches to see just how they compare. There will be 8GB and 16GB kits ranging in speed from 2133MHz - 2400MHz, tested at native speeds, as well as overclocked. Overclocking of course will be dependent on exactly how far the testing rig will allow, but I'll push it as far as I can. The testing setup used for these benchmarks is listed below, where Turbo Boost has been disabled to eliminate uncontrolled clock changes that may skew the results. The CPU will be run with default Boost clock speed of 3.9GHz for baseline testing and bumped up to 4.2 GHz for OC testing, or as close as possible to that speed. All current updates and patches are installed for Windows 7 Professional 64-bit and the latest driver for the NVIDIA GTX 770 will be used.
- Processor: Intel Fourth Generation Core i7 4770K
- CPU Cooling: Corsair Hydro Series H100
- Motherboard: MSI Z87-GD65 Gaming
- Memory: Kingston HyperX Predator 2800MHz 8GB
- Video Card: NVIDIA GTX 770
- Power Supply: Thermaltake Smart 750W
- Hard Drive: Corsair Force GT 240GB SSD
- Optical Drive: Lite-On Blu-ray
- Case: Corsair Obsidian 650D
- OS: Windows 7 Professional 64-bit
CPU-Z: This application visually shows the settings that we have chosen in the BIOS. Items shown in this application include CPU speed and bus settings, motherboard manufacturer, BIOS revisions, memory timings, and SPD chip information.
Task Manager: We use this utility to show physical memory, kernel memory, page file, and processor usage.
- Processor: Intel Fourth Generation Core i7 4770K @ 4200MHz
- Memory: Kingston HyperX Predator 13-15-15-35 3025MHz
Overclocking on Intel Haswell processors is quite a bit different from what we are used to in the last few generations, where the CPU clock speeds did not influence the clock speed the memory controller could handle. Entry to Haswell memory overclocking 101 shows that, while the CPU may handle a nice overclock of up 4.7GHz to 5.0GHz on really impressive examples, the memory may not scale up past 1866MHz or 2133MHz at those CPU clock speeds, even though the memory modules are rated much higher. What I found on both of my CPUs was that anything greater than around 4250MHz on the CPU would not run the memory at 2600MHz or higher. That being said, keeping the CPU as close to 4200MHz was imperative if I wanted to push a set of modules to anything north of 2666MHz.
Pushing the HyperX Predator series any higher than 2800MHz required loosening the primary timings up and increasing the voltage applied to the DIMMs to 1.77v. Tweaking the system agent, analog and digital I/O voltages and some of the subtimings was required to get over the 3000MHz mark for a final clock speed of 3025MHz. This bump of 225MHz over the XMP #1 profile hopefully brings some additional performance to the table.
Maximum Memory Speed:
The maximum memory speed for each set of overclocked modules is indicative of how well the modules ran on this test system. As such, your results may differ in either a positive or negative way based on the capabilities of your hardware. In other words, your mileage may vary!
The benchmarks used in this review include the following:
- PCMark 8
- Geekbench 3
- Hyper Pi 0.99
- SiSoft Sandra 2014
- X.264 5.1
- Metro: Last Light