However, it is not only the low operational voltage that makes LoVo HyperX memory modules from Kingston so attractive. Overclockers may also be quite interested in them, because they are based on Elpida “Hyper” chips that boast one of the best frequency potentials out there. And since these are ordinary chips, the memory modules based on them can work just fine at the same voltage as standard and overclocker DDR3 modules do. So, on the one hand, 1.65 V voltage is of no risk to this memory, and on the other, such serious increase in voltage compared with the modules’ nominal setting can be of great value during overclocking.
Well, let’s take a look what Kingston KHX1866C9D3LK2/4GX memory from LoVo HyperX series is capable of during overclocking. Our next series of tests was aimed at finding that maximum clock speed, at which the tested kit could work without any problems using three most typical timings sets: 6-6-6-18-1T, 7-7-7-20-1T and 9-9-9-24-1T. We used different DIMM voltages: from the nominal for this memory 1.25-1.35 V to standard 1.5 V and higher 1.65 V. The stability test during this test session consisted of a 30-minute run of 64-bit Prime95 25.11 version in Blend mode.
As you see from the obtained results, 7-7-7-20 timings are no problem for Kingston KHX1866C9D3LK2/4GX. Of course, at lower voltages you can only count on frequencies below 1600 MHz, but if you set the voltage at 1.5 and 1.65 V, the results will be very good: the modules will be fully operational at frequencies even higher than 1866 MHz.
The use of less aggressive timings of 9-9-9-24 causes a significant increase in frequency potential, so that you could use Kingston KHX1866C9D3LK2/4GX modules as DDR3-2000 even at 1.5 V voltage.
Unfortunately, we couldn’t achieve long-term operational stability during the tests at 1.65 V voltage. The modules equipped with standard aluminum heat-spreaders overheated fairly quickly. That is why there is no result for the 1.65 V voltage setting on our graph. However, with minimal improvement of the modules cooling, Kingston KHX1866C9D3LK2/4GX can definitely produce a more impressive result.
Instead, the kit proved fully operational with aggressive 6-6-6-18 timings. We had to sacrifice some frequency in this case, but nevertheless, the ability of this memory kit to work as almost DDR3-1600 with timings like that may come in very handy in certain conditions.
Summing up the obtained results, I have to say that dual-channel Kingston KHX1866C9D3LK2/4GX kit behaves in a pretty typical manner for a memory kit based on Elpida chips. The advantage of these DDR3 SDRAM modules is their ability to conquer pretty high frequencies with 9-9-9-24 timings, which is exactly what we saw during this test session, even though the tested kit is from the LoVo HyperX series.