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AMD RYZEN 9 3900X 12-Core 3.8 GHz (4.6 GHz Max Boost) Socket AM4 105W 100-100000023BOX Desktop Processor

Ships from Canada.

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  • 3rd Gen Ryzen
  • Socket AM4
  • Max Boost Frequency 4.6 GHz
  • DDR4 Support
  • L2 Cache 6MB
  • L3 Cache 64MB
  • Thermal Design Power 105W
  • With Wraith Prism cooler

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about Ryzen 9 3900X

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details
  • Return Policies
  • We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1, 2019 and December 24, 2019 you will have until January 31, 2020 to return your product. There's nothing additional that you have to do!
Anonymous
Ownership: 1 month to 1 year
Verified Owner
4/ 5
Very satisfied 11/13/2019 9:55:47 PM

Pros: -Excellent performance out of the box on X570 with the most recent drivers
-Depending on the chip and your cooling solution, Precision boost 2 will cause at the very least some cores to hit the advertised 4.4GHz boost clock.
-Performance scales well with faster memory - makes OCing memory worthwhile. If you go above 1866 Mhz make sure to lock MemCLK = UClk in bios.
-Includes decent stock cooler

Cons: -Precision boost 2 can be overly aggressive during light workloads. HWInfo reporting core voltage spiking up to 1.49 sitting on the windows desktop.

-If you OC your memory, your board may not be able to deliver enough juice to OC your CPU. I can manage a 4.4GHz all cores lock, but anything higher either fails to POST or crashes windows. (MSI MPG X570 Pro Carbon wifi). Not a big deal if you'd prefer to not OC, or OC memory instead.

Overall Review: Overall very happy with this CPU as it is on par with comparable, more expensive intel chips. For multithreaded apps, performance can be better than intel counterparts.

The usefulness of manually OCing this chip is questionable, as temperature will be the limting factor for non-liquid cooled rigs. PB2 is very good at adjusting the frequency and power delivery to the perfect spot to sit just under your defined TJMax. It also is very good at only boosting frequencies where there is a reason to do so - i.e. the thread is actually being used.

AMD recommends that the chip not exceed 95C, but it will never get close to that outside of torture testing provided you have decent cooling. The included stock cooler is fine.

Undervolting to 1.2 and locking all cores to 3.6GHz yields a fast and very cool CPU for everyday use. Let PB2 do its thing and you've got an awesome gaming/Content Creation CPU. PBO power Limits can be adjusted to make it more likely that PB2 automatically OCs to 4.4.

Would Recommend, but took off one egg for the overly aggressive PB2 algorithm. It can be fixed with a few minor tweaks, such as limiting the CPU's maximum power consumption, but then you are sacrificing performance when you really want it.

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Ownership: 1 week to 1 month
Verified Owner
1/ 5
missing pin doa 11/13/2019 8:10:25 PM

Pros: None

Cons: only if it worked

Overall Review: Just when I had the free time to make a build a bad CPU come to the doorstep

0 out of 3 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Great for average gaming 11/12/2019 9:54:05 AM

Pros: Great price point
Fast enough

Cons: Single core speed is lowest of newer cpu's

Overall Review: A 2600x gives the same performance. Both will boost to 4100 mhz and run under 60c with proper cooling. If you are doing high refresh 1080p or 1440p gaming I would suggest the 3600x or 3700x. If you are doing 60hz 1080p/1440p the 3600 is perfect.

0 out of 3 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
AMD IS BACK! 11/12/2019 9:22:13 AM

Pros: Rock solid performance for the price.

Cons: It doesn't rack the leaves in my yard.

Overall Review: So glad AMD is back with some decent CPU's. I last got burned several years ago with an AMD FX CPU witch had abysmal performance and very misleading advertising at the time and had gone back to Intel for a while after that incident. I decided to give AMD another try with a game console sized PC build and couldn't be happier. 7NM computing is finally here!

1 out of 1 people found this review helpful. Did you?
Anonymous
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Best bang for your buck 11/11/2019 7:59:25 AM

Pros: It provides the best performance for your dollar.

Cons: Stock cooler is junk. Running a stress test the temps jump to high 80's low 90's, double checked thermal paste, it was good. Cooler simply doesn't have the capacity it needs. Changed to a hyper 212 Evo and max temps now in the low 70's after 20 minutes of stress testing.

Overall Review: I would absolutely recommend this cpu for a mid range (high mid range) just be sure to budget a bit extra for a better cooler. 4 star only because the stock cooler is junk.

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Anonymous
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Heck of an upgrade 11/9/2019 5:48:58 PM

Overall Review: Upgraded from a 1500X. Difference is night and day. Massive uplift in many games I play, finally I'm not bogged down by CPU bottlenecking (1070 Ti). Kudos to AMD for supporting older motherboards.

Did you find this review helpful?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Extremely Happy 11/9/2019 3:22:04 PM

Pros: - Excellent performance for the price.
- No issues with the ASRock x570 Taichi.
- Extremely fast with a gen4 nvme drive.
- Security against classes of speculative execution vulnerabilities.

Cons: - Max clock I've seen has been 4.587GHz, not an issue for me or worth taking a star off.

Overall Review: I've had zero issues with mine thus far. My last chip was 10 years old and I am extremely content with my decision to make the leap and upgrade.

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Great Cpu 11/9/2019 2:33:13 PM

Pros: Runs cool overclocked to 4100

Cons: None

Overall Review: Great cpu no issues so far

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