Overclocking
Overclocking is never guaranteed so the presented results may vary from results on other memory kits. I am not recommending overclocking if you do not know what are you doing. High voltages may damage hardware and it will not be covered by warranty.
Expectations regarding overclocking potential are raising when we think about G.Skill. This brand is always proving that their memory is well selected and tested. In every each of G.Skill memory kits I found some headroom for additional improvements. Let’s take a look what we were able to achieve on the Ripjaws 4 memory.
All overclocking results were performed on the ASUS Rampage V Extreme motherboard and i7 5820K CPU.
At the beginning one more look at our memory kit. Serial number is suggesting us that inside we can find Samsung memory IC. Most users won’t care about it but overclockers do as it affects our overclocking results or may help to pick right memory timings or voltages.
Our memory is based on Samsung memory chips but you can count to also find SK Hynix in DDR4-2666 or higher clocked Ripjaws 4 memory kits.
Ripjaws 4 DDR4-2800 is overclocking good but you have to spend some time to pick right timings to reach higher memory clocks.
I’ve started from settings at default voltage of 1.2V. At this voltage I wasn’t able to set much higher clock than the DDR4-2800 but I could tighten the timings what of course affect performance. Performance at DDR4-2800 CL15-16-16 1.2V looks good and screenshot with this result you can see below ( please click on the screenshot to see more details ).
Keeping 1.2V I was also able to set:
- 2400 CL14-15-15-25 CR1
- 2666 CL15-15-15-25 CR1
- 2800 CL15-16-16-25 CR1
Next step is to find maximum stable clock. I could boot into Windows at DDR4-3333 but motherboard had problems to recognize all memory sticks so I had to lower clock to DDR4-3200. Trying various memory timings and voltages I finally made it pass stability tests at DDR4-3200 16-17-17-36 and voltage of 1.35V. This is really good result and doesn’t require high voltage.
Other results at 1.35V are as follows:
- 2400 CL12-13-13-25 CR1
- 2666 CL14-15-15-25 CR1
- 2800 CL14-16-16-25 CR1
- 3000 CL15-16-16-25 CR1
- 3200 CL16-17-17-36 CR2
At the end I wanted to try higher voltage so I moved to 1.5V. I couldn’t make higher stable maximum clock than the DDR4-3200 but I was able to tighten timings at lower clocks.
Below we can see DDR4-3000 at CL13 but as I already mentioned, required voltage to set it was 1.50V what can be already too high for many users.
Other results at 1.50V:
- 2666 CL11-14-15-25 CR1
- 2800 CL12-15-15-25 CR1
- 3000 CL13-16-16-25 CR1
Maximum achieved clock is pretty amazing – 1882.1MHz / DDR4-3764. Maybe not stable and only on one memory stick but still counts and shows overclocking potential of this memory.
Link to the CPU-Z validator you can find here.
