Corsair Vengeance LPX 16GB (4x4GB) DDR4 DRAM 2666MHz (PC4-21300) C16 Memory Kit - Black

There's already a lot of technical reviews on this product so I'll try to keep my review to a minimum. I purchased to packs for a total of 32GB of memory to use with an Asus X-99 Deluxe MB and an I7 5930K CPU. The system runs pretty much 24/7 and for the past 5 months, haven't had even a slight hiccup. I'm a light gamer and use the PC a lot for video editing and Photoshop work as well as some business applications. Everything is fast, fluid and frustration free. One point to note, during initial installation, the Asus X-99 wasn't showing one module at all which caused the matching module in the same bank not to be detected. Initially I thought I had a bad stick, which happens from time to time. I swapped the modules around and then noticed the problem didn't move to a different slot. Made me look at the MB. Long story short, I had to update the BIOS for the X-99 Deluxe. Once I did that, all memory was working great and being recognized by the system, problem solved. When making the initial purchase, I was on the fence with these modules and a few others that were slightly faster. For my use, these worked well and were less expensive and I couldn't justify the cost difference. Other people may have different needs so make your purchases accordingly. Right tool for the right job.

Wanted to upgrade from 32GB to 64GB (max for my current motherboard). The Corsair was listed as compatible with my motherboard MSI Z170A PC Mate (MS-7971) which I bought in 2016ish. There were hundreds of compatible memory listed, but not so many still available for purchase. I didn't want to take a chance on a product not on MSI's compatibility list. I wasn't entirely sure if 2/32GB sticks would work so opted for 4/16GB sticks. Installed easy, and not any bigger than the original memory, so no fit issues. Took 3-4 reboots, w/BSOD each time, before the system registered the new memory, but after that seems to be running without a hitch. Price was very good, less than I originally spent for 32GB. Don't use for gaming so I can't evaluate for that and haven't used long enough to be able to comment on stability but so far, very happy.

Needed 64GB of RAM for a workstation for work. Prices had finally come back down to reality where it was justifiable. In March 2018 this kit sold for more than $850! Now, as of April 2019 it sells for around $300. Much more tolerable. I used this kit in combination with the AMD Ryzen 7 2700 on an ASROCK B450M PRO4 motherboard. I was a bit worried as this particular kit wasn't on the QVL on ASROCK's website, not only that but 64GB was only rated to run at 2666MHz at best according to ASROCK. Well I'm happy to report that this kit is able to run stable at 2933MHz with timings around 17-17-17-17-36. Not the best, but honestly better than I expected. I tried 3000Mhz but it wasn't stable and the system would freeze during long Blender renders. Not sure if this is overall a limitation of my CPU, the motherboard or the kit of RAM. In any case this RAM is performing as expected if not better. Lower profile than typical flashy RAM also ensures compatibility with more CPU air coolers. This RAM is a solid performer, and good value for the money (and the price is getting better every day now)

I use this memory in the computer I built to run Zwift and other virtual cycling apps. For this application and gaming in general, the memory does not need to be exceptionally fast. Rather, the GPU needs fast memory.

I had ordered one about two or so years ago for my old computer build. I decided to build a rig for my son's birthday and I no longer use my old desktop, so when I found out that my old ram worked on his new mobo, I ordered another stick to make sure he had 16gb of ram total. I parted out a few things from it like the ram stick I had, the case, and a few fans as well. It's not the fastest ram his mobo can support but it is a very good choice for him. I was glad they had it still and for less than half the price I originally paid for it.

From an enthusiast standpoint these are... Well, they actually do much better than expected, being a value set. But these things are full of ifs. You are probably saying, "why buy a corsair value pack if you want to overclock?" Well, sure. I convinced myself the money was more valuable than that last 0.5% of system performance. But these actually do reasonably well. Details: They come with two XMP profiles, one set up for 2666 at 1.20V and one set up for 2800 at 1.37V. ROG suggests that "most" DDR4 ICs can handle timings of 15-15-15-34-T2 at 1.40V or less. So here are my results. The 2666 profile handled 15-15-15-34-T1 at 1.30V and passed two iterations of memtest86. I was surprised they could handle T1, but then again I only have 16GB right now. The 2800 profile, though, is a bit tricky. I was able to make 15-15-15-34-T2 stable, but only at 1.47V. Long term effects of such a high voltage are not known this early in the DDR4 lifeline. Basically, running this you could potentially degrade the memory and wind up unstable again, then have to downclock or replace your RAM. The other wacky thing about their XMP profile for 2800 is the PCI clock. 126.96 Hz. This will do some maddening things to you unless you have a good CPU sample. The gist is this: at a 100 MHz Bclk you can reach 4.5 GHz and probably get stable at around 1.25 Vcore (I am running a hex, your mileage may vary with 5960x). If your Bclk is 126.96, though, you can't reach 4.5 - you get to choose between 4.44 and 4.57. You probably have a 1 in 3 chance of your CPU being stable at 4.57 GHz, and if you're like me you get stuck at 4.44 instead. So now you have to choose between 4.44 GHz @ 2800 15-15-15-34-T2, or 4.50 @ 2677 15-15-15-34-T1. There is something magic about that 126.96 Bclk. It seems like you could pick something else and reach 2800 with different settings - bus every other config I've tried (so far) to reach 2800 at a different PCI clock has failed pretty horribly. Like, reset BIOS, your system won't even post. Overall, this set does well, handles tight timings fine, even runs at 2800. But the 2800 profile is pretty awkward to work the rest of your system around. Again, not an enthusiast set, but I've put it through the whole course and these are my results. All 4 sticks work fine. For the competitive price and corsair dependability I gave it 4 stars.

Corsair CMK64GX4M4A2666C16 Vengeance LPX 64GB (4x16GB) DDR4 2666 C16 Desktop Memory Kit for DDR4 Systems Poped it in and no issues at, all 64GB reading in System, no more sudden game closing with 32GB.

So it's an awesome product, however instead of an 8 gb @ 2666, I got 16 gb at 2133. I was pleasently suprised to see instead of 16 gb I had 24 after the upgrade with a very minor difference in speed. I have decided I will keep it, however I think QA should inspect each unit of this ASIN to see if there is a mismatch. The box art seems to say the right description. Even the stick itself says 8gb 2666. It isn't until I go into the BIOS that it says what it actually is. So this goes a little deeper than I was expecting...