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Corsair Vengeance LPX DDR4-2666 32GB Review


Overclocking Results

For our memory overclocking tests we are usually interested in two main elements: how well the memory scales with additional voltage and how versatile it is at overclocking with different timings. However, we quickly found out that this memory kit doesn’t really benefit from going above 1.40V and in fact sometimes worsened overclockability depending on timings. So we decided to simply increase the voltage from the manufacturer specified 1.35V to 1.40V, and put all our efforts on timings scalability instead.

In order to make sure that there weren’t any possible CPU-related bottlenecks, the CPU Cache Voltage was set to 1.30V and the CPU System Agent Voltage set to 1.25V. We focused on four basic timing configurations (12-12-12 / 13-13-13 / 14-14-14 / 15-15-15) all with a 1T command rate for optimal performance.

With the pleasantries out of the way, let’s get to the fun stuff.

Large capacity memory kits have always been more hit or miss when it comes to overclocking since there are more ICs and thus more chances to be held back by just one poor clocking chip. However, since the 16GB version of this memory kit proved to be an exceptionally good overclocker, we obviously had high hopes for this model especially since it features the same Hynix MFR ICs. We had no doubt that it would be able to upstage our last 32GB kit – a low-clocked Crucial part that nevertheless proved to have a lot of headroom – but by how much was a mystery. Thankfully, as you can see above, this Vengeance LPX model turned in some very solid numbers.

Obviously, we would have loved to hit the Holy Grail of DDR4-3000 15-15-15-1T, but it wasn’t quite meant to be. Having said that, 36Mhz off isn’t something we are going to gripe about. As a consolation prize, this kit was particularly impressive at 14-14-14 and it achieved the highest frequency that we seen so far at DDR4-2854. Further tightening the timings to 13-13-13 caused a serious decline in headroom, but we were still above this kit’s stock DDR4-2666 clock speed, so it’s still pretty remarkable. Impressively, when we set the timings to 12-12-12 this memory kit’s overclock was almost 70Mhz higher than what we managed on the 16GB DDR4-3000 G.Skill Ripjaws4. Clearly, this Vengeance LPX 32GB model is a very versatile solution for those who want to be able to play around with frequency and timings to find their system’s particular performance sweet spot.

Click on image to enlarge

These screenshots are just to prove that we did indeed achieve the overclocks listed, and that they were stable enough to pass a series of mainstream benchmarking and stress testing applications. If you are doing super critical work, then may a little Prime95 stress testing should be done as well, but for gaming and day-to-day tasks our testing is more than sufficient.

Since all of these overclocks were done with the 1T command rate, we decided to see what this Corsair kit was capable of at 2T, which is what this particular model is rated for anyways. As you will see below, it is very impressive.

As you can see, by loosening the command rate we were able to push this kit just past the DDR4-3000 mark while still keeping the tighter than stock timings. To put this into perspective, there is only one 32GB DDR4-3000 15-15-15 memory kit on the market right now, and it retails for over one thousand dollars. If your results end up matching ours, we think you’re getting a relative bargain here. So does any of this actually translate to worthwhile day-to-day performance improvement? Well check out the following two pages to see our benchmarking results with eight different timing configurations, including the two XMP 2.0 profiles.

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