Patriot Viper Steel DDR4 RAM 16GB (1X16GB) 3200MHz CL16 1.35v UDIMM Desktop Gaming Memory Module Compatible with XMP - PVS416G320C6

The compatibility and how it functions is very reliable. Fits perfectly in my computer very compatible. Does not crash and looks great

Before I get on to the specifics, please keep a few things in mind:1.) Forget about XMP, this is going to be manual tuning all the way. Probably even on an Intel platform.2.) If you just want to game or run some other app that requires fast memory with a minimum of hassle, this kit is not for you.3.) If you have a Ryzen platform, you probably won't get useful performance out of this kit above 3800 MT/s.4.) Unless you have won the silicon lottery with your specific Ryzen CPU sample, even 3800 MT/s isn't going to happen.5.) Likewise, even if you have a golden chip. you are going to need some luck with your motherboard.6.) You should expect to spend hours and hours tweaking and testing to get something usable. If that is not your idea of fun, this kit is not for you.Now, if you are undeterred by all of the above and are still interested in this kit, please read on.The kit comes in some rather plain packaging. Some people are unhappy with this, but I say that the plainer the packaging, the easier it is to recycle, so I am good there. I want my money to go to R&D, quality binned B-die chips, and QA. Not to marketing or packaging.Another complaint I hear about this kit is that the heat spreader is kind of cheap. This is fact. However, fancy heat spreaders are a bit of a scam. Even at high voltage and clock, you are not sinking much more than 5W of power into each stick, so whatever. I would prefer no heat spreader, same binned b-die, same quality PCB, and $1 less for the product. That being said, these sticks are a little on the tall side. Keep this in mind if there might be a clearance problem between your RAM and your tower cooler. If I wanted two kits of this, it would be an issue for me. But since I only want one and the slot nearest to the CPU is unoccupied, I have no clearance issue.I spent hours trying to get these to run at 3800 MT/s, to no avail. It is either the IMC inside my R5 3600XT or my motherboard (MSI B450 Pro Carbon WiFi), not the kit's fault. I had no trouble at all running at 3733 MT/s, and I got timings that were even better than were suggested by DRAM Calculator for Ryzen. I used 'fast' settings, 'A3/A2/B1' for for PCB rev, and (of course) "Samsung B-die' for memory type.I used the exact recommended primary, secondary, and tertiary timings. However, the termination resistances didn't work for me; I went with the board's defaults for those. After testing extensively at 15-15-15-15-30-1T and passing, I went for 14-14-14-14-28-1T. Those passed my quick testing and I am half way through the full battery of MemTest86 as I write this review. I am really, really comfortable with the looser settings and they are giving me everything I want.That being said, I am looking forward to hours and hours more fun tightening down the secondary and tertiary timings to not leave even one cycle of performance on the floor. If I get bored with that, I might be forced to game instead of benching -)For $125 I got a kit of the highest possible bin of B-die memory and it suits me perfectly. You can buy more expensive kits if you need the name "G.Skill" printed on the side, and still more expensive kits if you want that plus RGB. As for me, I don't care about anything except the bin quality and quality time at my bench. I figure I saved somewhere between $50 and $100 making this choice as opposed to the best bin of TridentZ RGB and lost exactly zero performance doing it. That is going to be my down payment on a shiny new R5 5600X as soon as I can get my sweaty little hands on one.Now, if you are still planning on buying these, I have a few quick tips for you to save some time:1.) Have your bootable USB stick with MemTest86 on it ready before your package arrives.2.) Use the same stick to save your OC profiles, unless your mobo will retain your profiles after clearing CMOS3.) Plan on testing outside of your case unless you have a clear CMOS button on your back panel.4.) For initial testing, cut the address range down to 4G and skip the last two tests, and do two passes instead of four. this will save you a ton of time.5.) Once you have settings you like, run all tests, full address range over night before using them 24/7.6.) Start at DRAM voltage of 1.5V. Once you have settings you like, you can experiment with cutting some voltage, if you like. This won't hurt anything and will save you some time upfront.7.) Enjoy the ride. If this doesn't sound fun, just get a 3600 CL16 kit for $80, boot it in XMP and call it a day.I hope this helps and thank you for reading.

Works exactly as advertised full speeds and full space, added them to my current 32gb viper works seamlessly

Just a forewarning to anyone looking to buy this kit is to make sure to check your motherboard manufactures QVL of compatible RAM. check the part numbers for example this kit "PVS416G440C9K" and check if its there. for peace of mind if you want to play it safe. I purchased this kit anyways even though its not in the QVL. but that doesn't mean you can't run it :Dtesting results are done by a complete novice (me) and will verify soon in forums if they are done right for now its just a typical amazon review. I had a lot of fun benching this kit to find the right timings for a few profiles on my daily rig. There were tons of trials and errors cold booting double booting no boot etc. all while learning how timings work. took a few days/nights trying to find the right sweet spot for my system, While trying to stay within the memory controller limits, hopefully its enough to utilize this kit. Here are my results.Tested PC PartsCPU - Ryzen 9 3900x OC 4.3ghz on all CCX'sCooler - Noctua NH-U12S (push/pull on NF-12 fans)Board - Asus TUF x570 Plus Wi-Fi bios rev. 1407 ( memory kit is NOT in the motherboard QVL)GPU - Nvidia GTX 1060 6gb (doesn't really matter for this test)Case - Lian Li Lancool IIPSU - EVGA 850 G5Storage - Corsair Force MP600Tested Profile:CPU Setting - Ryzen Master on Manual OC @ 4.3 1.28v on all CCX'sManual (D.O.C.P. Off) - CL15 3800Mhz 1.45v FLCK1900 (15-15-15-26-CR1)Memtest86 - 900%/1500% pass 0 errors stable on all 16gb (proof with intel burn test/pictures)Aida64 - Memory Read/Write - Hovers around 57000-576000 latency is around 7.2ns avgDRAM Calculator - Tested using internal memtest/latency check and fine tuningThaiphoon - Module Verification - Read the Kit and report, Then scroll down and click "view delay in nanoseconds" and then Export to .HTML so that you can finally get the proper timings in DRAM Calculator**Use this program to find the delay/latency and to import the DOCP/XMP to DRAM Calculator**Summary:Amazing kit that clocks FAST. I was scared to buy this kit at first because its not in my motherboards Qualified Vendor List (QVL) furthermore I was looking at the voltages on the kit themselves, Which they state are rated to go 4400Mhz @1.48v I would say its fairly high for daily use. Normally should be around 1.35v is what everyone says, but I will test it out in the long run @ 1.45v. I ran MEMtest86 overnight with a 0 errors and a 1500% pass so I would say its stable that this profile. I will try to test for higher frequencies another day, maybe 4200? Overall I am satisfied with how this kit performs. I would definitely get another set if I could.