AMD Ryzen 9 3900X 12-core, 24-thread Unlocked Desktop processor with Wraith Prism LED Cooler
Condition: Used - Very Good
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Availability:
Only 3 left in stock, order soon!
Arrives
Saturday, Sep 12
Style: Processor
Features
- The world's most advanced processor in the desktop PC gaming segment
- Can deliver Ultra-fast 100 plus FPS performance in the world's most popular games
- 12 Cores and 24 processing threads, bundled with the AMD Wraith Prism cooler with color controlled LED support
- 4.6 GHz max Boost, unlocked for overclocking, 70 MB of game Cache, DDR 3200 support. OS Support-Windows 10 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit. Operating System (OS) support will vary by manufacturer
Description
AMD Ryzen 9 3900X 12 core, 24 thread unlocked desktop processor with Wraith Prism LED cooler.
Brand: AMD
CPU Manufacturer: AMD
CPU Model: Ryzen 9 3900X
CPU Speed: 4.6 GHz
CPU Socket: Socket AM4
Processor Series: Ryzen 9 3900X
Processor Speed: 4.6 GHz
Processor Socket: Socket AM4
Secondary Cache: 64 MB
Wattage: 105 watts
Cache Memory Installed Size: 64 MB
Processor Count: 1
Processor Number of Concurrent Threads: 24
Processor Core Count: 12
Platform: Not Machine Specific
Item Dimensions L x W: 1.57"L x 1.57"W
Brand: AMD
Processor Brand: AMD
Model Number: Ryzen 9 3900X
UPC: 730143309950
Manufacturer: AMD
Mfr Part Number: Ryzen 9 3900X
Warranty Description: 1 Year Limited, 3 year manufacturer
Item Type Name: Desktop Processor
Global Trade Identification Number: 50
Item Weight: 1.6 Ounces
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If you place your order now, the estimated arrival date for this product is:
Saturday, Sep 12
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View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Processor
The AMD Ryzen 9 3900X is an amazing processor with outstanding speed and multitasking performance. Installation was easy, and it handles gaming, streaming, and productivity tasks without any issues. Runs smoothly and delivers excellent value for the performance. Highly recommended for anyone building a high-end PC!
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Reviewed in the United States on May 13, 2026 by Thomas
Style: Processor
So I have stuck with AMD since they released their Ryzen series CPUs. Back in the day (pre 2000 and into early 2000s) I used the Athlon processors exclusively. Eventually switched to Intel processors, and since about 2016 have stuck with AMD Ryzen exclusively. Every time I upgrade I am happy I decided to stick with them. I overclocked this Ryzen 9 3900x which I overclocked to 4.2ghz (able to go to 4.5 but haven't tested that out yet). Just as with my last Ryzen 7 2700 that was overclocked for the 1.5 years I used it it has been incredibly stable. I do not use the wraith cooler, I have a dual chamber water cooler as these CPUs run a bit hotter than the Ryzen 7 (8 core) CPUs - of course I used a water cooler with that as well due to overclocking. You could get away with the cooler and overclocking possibly but it is best just to use the water cooler just in case. The processing power is incredibly. I have it coupled with a 2080ti and 32 gigs of 3200mhz ram. I do video editing, graphics, and sound editing for work. Heavy CPU and graphics card usage in those processes and this computer runs perfectly. I would stack this against any intel chip in the same range... this one beats it in speed and price. In Ryzen Master software currently it is fluctuating between 36 degrees C, and 38.6 degrees. With my Ryzen 7 2700 which was overclocked to 4 ghz and with my other water cooler (single chamber) it was usually between 24-30 C. so we added 4 more cores, and more power per core. I have not noticed a significant increase while running games/software but the limit is 95 degrees C so it is not really something you need to worry about. I highly recommend this CPU. This is expensive when looking at CPUs like the Ryzen 7 2700x and similar, but 430 dollars or whatever it was is well worth it. My old PC (which has been rebuilt and still has a GTX 1070) is still a modern PC that is capable of a lot and this current one will be for several years really. Short of upgrading the video card to the 3090 within the next year (maybe) I do not foresee any real need to upgrade the CPU for at least 3-4 years. As far as money goes - sometimes we need to be reminded of perspective. My fiance was getting a laptop the other day and wanted to spend 500-650 max. She is a traveling medical worker. So a laptop will be very important to her and used a lot as she goes from city to city. So I explained that we drop upwards of 1000 dollars or more on our phones every 1 to 2 years without much thought at all. yet when we are buying electronics that will need to have a lot of power and hold up and be used as much or more we get very cheap. I spent 2000 dollars on a laptop back in 2012 and have upgraded it here and there (ram and hard drive) and it still runs extremely well. I use it for a lot of things. Had I spent 500 dollars it would have been useless by now. So if you have the means, do not cheap out and buy a 300 dollar option for your CPU - you will end up spending that much or more very soon. Always buy beyond what you need when building a PC if it is doable for you. I have had systems that ran flawlessly for many years, and ones that played the latest games at high settings with decent FPS, and ran adobe software wonderfully. I will update this review when I test an OC of 4.5 ghz and give you the details on cinebench for both the 4.2 and 4.5 OC.
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Reviewed in the United States on November 10, 2020 by JJ Oliver
Style: Processor
I absolutely love this CPU (3900X), having come from an old I7-2600K that served me well OC'd way over it's spec. I've got plenty to say about it. It's great at gaming and productivity. Intel can push individual cores higher, but their low core counts and larger process makes them very hot and bottle-necked at multithreaded applications. Be sure to read the warning below about the socket and swapping heatsinks. Thermals When I first got this, I noticed it ran very warm! I read all kinds of complaints on forums of people that couldn't run this cool, or that couldn't OC it. I've been fortunate on both fronts. I went into the UEFI and brought the CPU VCore down to 1.298V while also overclocking to 4.3GHz (all cores). I've never had stability issues with these settings, although I may have simply won the "silicon lottery." The stock cooler is very aesthetic and works pretty well for a stock cooler, but I swapped out the CPU cooler for a Cooler Master Hyper 212 Black Edition, which brought the top temps down by ~10C under load, which I think is pretty respectable. WARNING!!! If you apply a heatsink to this CPU, and then remove it, there's a very high chance that the CPU will pop right out of the socket, glued to the heatsink and in the process bend pins. Bent pins on this processor are *VERY HARD* to fix (at least tedious to bend back without breaking off). The socket retention system on the AM4 socket compared to Intel's is complete garbage!!! I had bent about 3 pins pulling my heatsink off after just a little wiggling of the heatsink on the surface of the CPU by pulling off the heatsink while the CPU was still stuck to it. Yes, the retention arm was still down, and yes, I ensured it was installed correctly before putting on the heatsink. This is just a quirk of this socket. If removing the heatsink, very carefully wiggle it around side to side to try and get air in-between the CPU and heatsink so it doesn't rip out the CPU from the socket. If you're impatient, you probably could just pull the heatsink straight up with the full intention of taking the processor with it, and then lay the heatsink with the processor straight up for removal, but I really wouldn't recommend it (unless that was a last resort). Over Clocking I wouldn't say I'm an expert over-clocker, but I've overclocked my systems for sometime, so I can at least give some starting advice. First, two things kill your CPU faster than anything else: heat, and over-voltage. There are a dizzying array of settings that can be played with in today's UEFIs. The ones to pay attention to are: VCore, CPU ratio, DRAM FCLK, and DRAM voltage. This is a CPU review, so let's stick to VCore and CPU ratio. My advice is to try lowering the voltage on this chip first! This is to reduce the heat put out by this blazing hot blowtorch. I dropped my to VCore 1.298V. Once you've verified that you can boot at whatever voltage you've dropped it down to, now try and overclock by changing the CPU ratio from the stock 3.8GHz to something a bit higher, like 4.3GHz. That's what I've been running with great stability. If you're going for pure performance, then you're going to want to stick with the normal VCore voltages and then push your CPU ratio, but you'd better have a great cooling solution that can handle the extra heat this will produce. Good luck!
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Reviewed in the United States on September 20, 2020 by Axon
Style: Processor
upgraded from my Ryzen 7 to this Ryzen 9 3900X for gaming cache. First off its insanely snappy. Will run a bit hot even with liquid cooling. If you buy this get liquid cooling. So right out of the gate my RTX 2700 Super Founders Edition had insane eye candy and much better speed. Anything you through at it will open at break neck speeds. Your mouse will be your enemy. It will move entirely way too fast due to its processing power. This thing mops the floor with all the Intel Chips ive ever owned. Even my I9 chips dont game or compute as this chip does. Its a must have if you want to play video games and do insane amounts of processing. It operates on all buses on your system board quite efficiently. Ive been debating messing with my memory timing as I have AMD Ryzen Memory Ready RAM which automagically times with the system clock of the CPU and AMD Ready Ram will run at 3600 MHz. You must set your XMP/DOCP option in the BIOS. But Ryzen makes efficient use of PCIE 4.0 and its fast. You wont be disappointed other than it will push some heat but running any gaming on a 70 MEGS of video cache dedicated to video rendering makes this a seriously badd chip for anything you want to do. Its smoking intel and I have been an Intel Fan for so many years until this thing fell into my hands. All I do for a living is work on PCs Desktops Servers, and Land based internet I go home to this and appreciate all it does. It will not disappoint and will stay strong for years. This absolutely buries Intel. Worth every penny I put towards it. Now my Ryzen 7 2700 will sit in its plastic case. Trust me I had to do it. When I play Ghost Recon with my son it looks as though he is Sprinting it renders frames so fast. The game runs so quick with playing with other gamers your mouse will piss you off you will have to lock the frame rates on your mouse and they move so fast on your screen its simply amazing. Eye candy with games coupled with a NVIDIA RTX you will be amazed. Okay not a fanboy of Ryzen but I love this chip. See how it holds up and I am a verified user.
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Reviewed in the United States on April 7, 2020 by Derrick Henry
Style: Processor
Very long overdue by like almost 6 years! Great CPU! Works great no matter what you throw at it! Video editing is excellent for that and audio editing and whatever else you do! Can't really comment on gaming since I don't game personally! Pretty easy to install and decent speed although now there's better CPU's since AM4 is pretty much dead. AM5 has been out a while. This CPU is still kicking well!
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Reviewed in the United States on March 7, 2026 by Mike Sniadecki
Style: Processor
In a word? IT'S A MAD BEAST. I have wanted something that could handle 4k and 8k video (codecs really play a part as all are not handled the same here). If you work with adobe products and you want a smoother performance then this CPU is for you and I never even see it go over 20% usage even when rendering. It's so good. As newer CPU's come out, this will be cheaper and will even be better value for money. Its mops the floor with its intel equivalent. Pros: * its fast, is beefy and its gonna chew through most of what you are struggling with now. A great balance for gaming and productivity. * Comes with a cooler (honestly it is the best looking stock cooler you will ever own) which manages to keep it tamed, just make sure to buy a case with high airflow. I dont recommend the NZXT cases because they dont have good front airflow. * Cooler comes with pre-installed thermal paste which is brilliant and it is very easy to install. (Look at the X570 motherboards for this CPU) Cons: * It gets hot. Oh it bakes very quickly so you will have to either buy an after market cooler or AIO to keep it cool over long periods of time if overclocking. Otherwise it's fine with the stock cooler Very impressed with the R9 3900x so far. I will be good for the next couple.of years for sure.
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Reviewed in the United States on February 25, 2021 by scotty zepplin
Style: Processor
The new Ryzen 3000 series chips are amazing. I was looking to replace my aging Haswell (4th Gen) Intel Core i7 4790k with something more modern - and when I read about the new Ryzen 3000 series, I waited an extra 6 months to re-build my PC...and boy am I glad I did! I cut encoding times for a 1080p 2 hour movie from 2 hours (near real-time) to < 30 minutes!! And through the power of the PCI-e 4.0 that this enables (when paired with an X570 motherboard), my storage access is now running at 5GB/sec write and read (with a PCI-e 4.0 enables NVMe SSD). Everything is blazing fast even when I have a ton of stuff running. If you’re looking for the ultimate chip for content creation, coding, and a very good option for gaming also (even if it gives up a few FPS to the highest end intel chips), look no further!! And it even comes with a passable cooler (if you don’t mind a bit of noise and don’t plan to overclock) with nice RGB LEDs built in. Quick note for early adopters with first generation X570 boards - several boards (mine included) want to give this chip more power than is really needed. On stock BIOS settings (with automatic voltages), it was providing upwards of 1.5v under load, which would cause the chip to get towards or above 80C, even with a high-end AIO water-cooling system. I put in a manual voltage offset of -0.20 so it doesn’t go above about 1.3V - at that voltage, it performs wonderfully and even under sustained 100% load it never goes above 69C. I gave up a few points in high end benchmarking but in real world loads (even encoding), it’s comparable performance and should improve longevity.
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Reviewed in the United States on October 18, 2019 by Brett
Style: Processor
This, is an amazing CPU. Lets go over things, though. PLEASE, PLEASE, keep your brackets/adapters that it(doesent) come with(mine didnt) it probbably came/is on your motherboard. I had to use a extra part from a spare wraith prism to attach the cooler. Im not sure if most motherboards come with those brackets, but i don't remember any coming on mine. You might want to order ahead some wraith prism brackets in advance if you don't have any(you can google to find the amazon link for them) otherwise, the cooler will NOT clip into the motherboard(because it doesn't have any place to actually clip into it) I would look up some youtube showcases about the prism cooler, you'll see what i mean. --- Pros. - Very quiet, except when under load(detail later in the review) - Absolutely SHREADS any game you put at it(seriously, i was running a csgo game at under 20% usage) - Most motherboards support it, but i had to update my BIOS(x370 gaming plus) - VERY CUSTOMIZABLE COLORS with the Wraith Prism software. Although you need another cable for it to work(included in box) - decently easy to install - booted up first try, though probably luck - no screws! just clips -- Mehs/Cons -- Color USB header/ Color control cable is 180 degrees from the actual power cable, making cables run over my graphics card and onto the bottom of my motherboard, making cable management super annoying if you want to control the color on your cooler. Pretty much every motherboard places their usb headers at the bottom of the motherboard, but its annoying running a whole cable over the top of your PCI-E slots to connect to the cooler.(if you want to control the colors with the software, you will have to connect the pre-included cable to your motherboard at the bottom usb input.) (see photo(s) that big cable is actually my CPU power, wrapped with the tiny cable im talking about) -- Brackets/adapters to fit the cooler do not come in the box, but thats my fault i guess for not keeping them when i got my motherboard. --- Thats about it! Amazing cpu. -- not as hot as people are saying here, with the stock cooler im hitting 60C and some slight 70C moments, idles for me at 36-40C. Some people are saying it IDLES at 60c, though i have good air flow in my case and a fresh windows 11 build.
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Reviewed in the United States on July 7, 2021 Reviewed in the United States on July 7, 2021 by Claire Twilegar