Patriot Viper Steel 16GB (2 x 8GB) 288-Pin PC RAM DDR4 4400 (PC4 35200) Intel XMP 2.0 Desktop Memory Model PVS416G440C9K

Pros: Great ram. If you're on AMD and can't get over 3200mhz, it's probably not the memory at fault. See below.

Cons: Other brands like Corsair have an easy to find guide on setting their ram up for Ryzen. I found Patriots competitors guides to be helpful in this case.

Overall Review: Ryzen 3600 Asus Tuf Gaming x570 This was the most challenging experience with setting up DRAM I've ever had. I knew what I was getting into with non-qvl sticks but I was hoping I'd get lucky. Default speed was 2133 mhz on setup - ok Used the timing calculator to try and hit 4,000 - not a chance even at 1.5v. Also learned from forums that 3800mhz with tighter timings is preferable to 4400mhz Found out DOCP = XMP. - couldn't break 3000mhz Found out people with this board have had issues with memory speeds in the A0 B0 slots - switched and could hit 3400 mhz with errors in memtest86. Hopefully a bios update will fix. Used Corsairs PDF for Ryzen memory and found out that 1T and gear down mode OFF can cause instability - and instability it did. 3800mhz on 2T with gear down mode ON no errors. Also used ProcODT of 48 as suggested by the guide. Went for tighter timings like CAS latency 14 - No luck on 14. Final settings with 0 errors on a full memtest86 run are as follows: Use the 1.45v XMP profile. Set to 3800mhz. FLCK auto (1800mhz). Now 15 15 15 15 34 50 for the first 6 settings. ProcODT - 48ohms, Cmd2T - 1T, Gear Down - Enabled. All others on auto.

Pros: This memory is a beast. I was able to get it to 4400Mhz HOWEVER Performance is not real good because of loose timings and how Ryzen handles anything over 3733. Best setup that these work with is Set your FCLK to 1900 Mhz and your memory to 3800Mhz Then set the Memory voltage to 1.5 volts and you can get CL14 timings which will out-perform 4400Mhz on a Ryzen system. If that makes you nervous you can set the voltage to 1.45 volts and set it to CL16 timings at 3800Mhz which will still out perform 4400Mhz. One thing to note I have now purchased 3 pairs of these and I got all three to work exactly the same way and I purchased them 6 months apart so this is not a fluke in the timings that I am saying and I got it to work on an ASUS x470 and an ASUS x570 motherboard with the same timings. Use the Ryzen DRAM Calculator.

Cons: None

Overall Review: Works exactly as advertised

Pros: Was able to boot up XMP on the ASUS X570 ROG Crosshair VIII Hero with a 3800X. Runs 4400 Stable and passes Memtest86. Seriously Install the newest BIOS, set everything to defaults and enable XMP.... Not hard. Optimal results are 3800 CL 14-15-15-15-34-50 T1 @1.45v Passed Memtest86. I was also able to push it to 4500 before extra tweaking and care to the SOC / IF voltage was needed.

Cons: Nothing!

Overall Review: I see a lot of people complaining they can't go above 3600 or even 3200 on AMD. Well that is not the memory fault, it a combination of auto settings on the motherboard and CPU. Not all Ryzen 3000 chips can reach FLCK 1900. I would say 99% can do 1800 Mhz which matches DDR4 3600. So either you are buying this kit because you are trying to go for 3800 CL14 on AMD or you are a Intel user. Don't complain that you cannot get this kit to boot above 3600 on AMD unless you know what you are talking about. Manually setting memory timing is a annoying, but anyone buying this kit should already know that anything above DDR4 3800 on Ryzen 3000 chips is counter-productive.

Pros: One of best RAM kits available for the price. I bought this knowing it would either max out or exceed my 9900k memory controller ability, hence no point in buying more expensive higher speed RAM than 4400.

Cons: Many current cpu memory controllers (intel ie 9900k, ryzen) cant do 4400 yet so requires setting speed/timings yourself if your cpu did not win silicon lottery for memory controllers. Future cpus from intel (10900k and rzyen 4000) should have higher percentage that can run this at rated speed.

Overall Review: One of the best RAM kits for the price. My 9900k's cpu memory controller wont post at 4400, will bench only 4266, 4133 will run memtest stable but only at high 1.4 vccio/vccsa volts. But 4000 rock stable for 8 hours memtest with reasonable 1.27 vccio/vccsa. Instead of stock 4400 19-19-19 at 1.45v, I was able to run 4000 17-17-17 and tight secondary timings with 1.4v dram, 1.27 vccio, 1.27 vccsa for 8 hours memtest stable. 4000 with tigher timings got nearly same aida64 speed with better latency vs 4266 C19 (secondary xmp setting). I tuned my kit by booting 4400k XMP (failed), then 4266 (booted but failed memtest in seconds), then 4133 (failed memtest until incremently raised VCCSA/VCCSI to 1.4 which is too high for my taste for 24/7). Settled on 4000 max for my cpu memory controller and then manually set volts to reasonable 24/7 of 1.4 dram, 1.27 vccio/vccsa. Then tightened primary timings to 18-18-18, ran memtest for 20mins, then to 17-17-17 passed. Tried 16-16-16 and 16-17-17 both failed. Then ran 17-17-17-37 which passed for 2 hours of memtest. Then booted at stock without xmp 2133 and wrote down all secondary timings and booted to xmp and wrote down all secondary timings. Then with 4000 set manually XMP off, voltage manually as above, was able to walk down secondary timings all close to or at 2133 level, left tertiary alone. Then memtest overnight 8 hours with 850% coverage no errors.

Pros: Solid memory with heat spreaders that are not too tall. I was able to overclock these quite a bit, awesome Samsung B-die memory works very well. I tried at various clock speeds using DRAM Calculator 1.7 (4000, 3866, 3733, 3600) and the best results for me were to set them at 3600MHz, CL14 at 1.38v. I followed all the DRAM Calculator settings for 'Fast' timings and it worked like a champ in my MSI X570 MPG Gaming motherboard. YMMV

Cons: Can't think of too many. Guess I wish it were cheaper, but not complaining for the performance I was able to achieve

Overall Review: Highly recommend, especially if you can get these on sale. Forget about using 4000MHz CL19 speeds. Even though that is fast, you can do better - much better. Start with that timing from the XMP profile, but then tune these to run much faster by doing some research online and put in some time to tune and test them. Worth it!

Pros: price low timings

Cons: fragile radiator

Overall Review: So far this result has turned out: 3600MHz 16-15-15-15-30 CR1 1.37V, SOC 1.05V. AMD RyZen 5 3600 4.2GHz 1.2875V + MSI X370 GAMING PRO CARBON Bios 7A32v1NV. I will continue to try to lower the timings :) UP. The final result - 3800MHz 16-16-16-16-30 CR1 1.38V, SOC 1.075V. Everything is stable.

Pros: Sleek look Good value

Cons: None

Overall Review: I was able to tune timings down to 16-16-16-36, 1.38 volts with Asus Z390 TUF board + Intel 9600k. Stable on multiple tests so far. Impressed and happy with the speed on relatively low voltage and might try to push to CL15 if I get bored. Hard to match the price-performance if you're able to get fast timings. Gun metal look is awesome.

Pros: 4400Mhz with 19-19-19-39 timings and 1.452V. Still running AIDA64 as I type this....Almost 18 hours. Samsung B die. No RGB

Cons: One minor con thus far. One of the heatsinks fell off upon insertion. Simple fix...Squeeze them before you install them.

Overall Review: Quick Update (8/12/19): The Gigabyte Z390 Aorus Master's BIOS is a bit flaky. That's a whole other story. I'm stilling tinkering with the memory and the board but thought I'd pass a few things along. It will boot and run stably at 4266 17-17-17-37 with DIMM voltage set to 1.48v in BIOS (1.488-1.500 effective). Also, the memory controller voltage and system agent can be lower to 1.30v. The tRFC and tREFI can probably be tweaked some. I recommend getting ASRock's Timing Configurator as what's shown in the BIOS is not accurate. If you have a Z390 Aorus Master be sure to double check your settings. Sometimes the BIOS needs to be cleared and the values have to be re-entered manually or via a saved profile. Also, put the board into single BIOS mode and save your profiles to a USB drive (FAT32). One final thought, results will differ from differing products however it can post and get into Windows at 4600Mhz with 19-19-19-39 timings. I may play with the higher frequencies at a later time. I'm opting to use the lower CAS latency and hoping to improve RFC and tREFI. I'm using a Gigabyte Z390 Aorus Master and an i9 9900k at 5.0Ghz on all cores. I don't think I can link Buildzoid's YouTube video but the memory sub-timings he used are an important part of getting these things stable. Set the last six sub-timings to 60, 60, 120, 120, 40, and 40 on both DIMMs. Also, set the voltage to manual. I used 1.44V which equated to 1.452V. Auto on my board ends up being 1.482V and it's not stable there. I disabled turbo but left EIST, CSM, and all the C States enabled. Also, I set the CPU voltage manually to 1.285V which ends up being 1.308 - 1.320V. This is with the CPU LLC set to Turbo. I haven't messed with the uncore yet. It's set automatically to 43 and I know some people are reporting success up to 47. My rig Gigabyte Z390 Aorus Master Intel Core i9 9900k @ 5.0Ghz all cores using MX-4 big blob method. Cooler Master ML360R no RGB Top mounted intake with the fans on top of the radiator running at full speed. Noise isn't an issue. EVGA Supernova 1000W G3 PNY 2TB M.2 CS3030 5 SATA III hard drives Phanteks Enthoo Pro Full Tower using stock fans at full speed and an additional Phanteks 140mm 1,200RPM fan wedged in the optical drive bay area. 18 hour AIDA64 average CPU Package temperature 80.1. Using 1.280V and CPU LLC set to Turbo yields 79.2 average CPU package temperature but failed after 13 hours.