DLJ System is supported by readers. If you buy products from links on our site, we may earn a commission. Learn more

Core i9-12900K High-End PC Build: DDR5 and PCIe 5.0 Ready

By: Henz Llarves | Date Posted: July 12, 2022

Core i9-12900K High-End PC Build: DDR5 and PCIe 5.0 Ready

Intel’s 12th gen flagship Core i9-12900K has been around for a while now, offering the best performance a high-end CPU can deliver. Along with superior performance, it also comes with competitive pricing that gives AMD’s offerings a run for their money.

Just a quick overview of the Core i9-12900K, it comes equipped with a total of 16 cores and 32 threads. 8 of those cores are performance cores that can reach up to 5.1 GHz max frequency, and the other 8 cores are efficiency cores that can hit 3.9 GHz max frequency each and optimally lower TDP for power efficiency while lowering temperatures too. This CPU is unlocked meaning you can overclock it to squeeze out even more performance if your chipset or motherboard supports overclocking, just about any aftermarket cooler will be able to cool this CPU nice and efficiently while being quiet to boot.

The Core i9-12900K doesn’t disappoint in terms of single-threaded performance. In fact, it offers the best performance that you can currently get from a mainstream desktop processor. This ensures that even the most demanding applications will run smoothly without any issues. In addition to its leading single-threaded performance, the Core i9-12900K is also a powerhouse when it comes to multi-threaded performance making it one of the best choices when it comes to productivity tasks.

The support for the PCIe 5.0 and DDR5 is also a nice addition for anyone looking to build a high-end PC that will last for the next couple of years.

Indeed, building a PC around the Core i9-12900K will ensure you have a great gaming experience while being able to multitask without any issues. However, choosing the right PC components can be tough so we’ve put together a list of components for you to choose from when putting together your Core i9-12900K PC build.

Components List

Core i9-12900KIntel Core i9-12900K

  • Cores/Threads: 16 (8P+8E) Cores/24 Threads
  • Max Clock Speed: 5.1 GHz
  • Overclockability: Yes
Check on Amazon
GeForce RTX 3080 TiNvidia GeForce RTX 3080 Ti

  • Ray Tracing: Yes
  • Architechture: Ampere
Check on Amazon
MEG Z690 UnifyMSI MEG Z690 Unify

  • Chipset: Z690
  • Form Factor: ATX
Check on Amazon
Trident Z5 RGB 6000MHz 32GB CL36G.Skill Trident Z5 RGB 6000MHz 32GB CL36

  • Size: 32GB
  • Speed: 6000MHz CL36
  • Brand: G.Skill
Check on Amazon
MEG CoreLiquid S360MSI MEG CoreLiquid S360

  • Scale: ‎360mm
  • Type: AIO
  • Brand: MSI
Check on Amazon
1TB RocketSabrent 1TB Rocket

  • Size: 1 Terabyte
  • Type: NVME SSD
  • Brand: Sabrent
Check on Amazon
870 QVOSamsung 870 QVO

  • Size: 1, 2, 4, and 8TB Options
  • Type: SATA SSD
  • Brand: Samsung
Check on Amazon
Toughpower GF1 850WThermaltake Toughpower GF1 850W

  • Wattage: 850W
  • Type: Fully Modular
  • Efficiency Rating: 80+ Gold
Check on Amazon
5000DCorsair 5000D

  • Brand: Corsair
  • Form Factor: Mid-Tower ATX
Check on Amazon

Graphics Card – Nvidia GeForce RTX 3080 Ti

Nvidia GeForce RTX 3080 Ti

Starting with the graphics card, we have here the Nvidia GeForce RTX 3080 Ti, delivering an almost equal gaming performance as the RTX 3090, but at a cheaper price.

Similar to the rest of the GeForce RTX 30 series lineup, the RTX 3080 Ti is built using the Nvidia Ampere architecture, which brings all of its improvements. These are better efficiency and performance, mixed with support for new gaming technologies.

Taking a look at the specification, we see that the GeForce RTX 3080 Ti offers 10,240 CUDA Cores with a Boost Clock of up to 1,665MHz. The card has 112 ROPS and 320 Texture Units and is paired with a 384-bit Memory Interface and 12GB of GDDR6X memory. The performance figures you can expect are simply staggering, with up to 34.1 TFLOPS of processing power. That is enough to run any game at 4K 60fps with ease, and even the most demanding titles in VR without difficulty.

With the GeForce RTX 3080 Ti you get access to Deep Learning Super Sampling, or DLSS, which uses deep learning algorithms to create an image upscaled by AI rather than traditional anti-aliasing methods, resulting in better overall performance at the expense of image quality. And with the help of the 320 Tensor cores that the GeForce RTX 3080 Ti has, AI processes like this one can be handled much faster. Furthermore, it also has 80 RT cores for ray tracing, which is a technique used to render realistic reflections and other advanced lighting effects, massively improving the level of realism in games.

I would say, for this build, the GeForce RTX 3080 Ti has everything you need to build a high-performance gaming & workstation PC – a perfect GPU to pair with the Core i9-12900K.

Motherboard – MSI MEG Z690 Unify

MSI MEG Z690 Unify

The MSI MEG Z690 Unify gaming motherboard just really suits this Core i9-12900K PC build. It supports this CPU out-of-the-box with its Z690 chipset and it is loaded with a lot of features that gamers and professionals will appreciate.

This MEG Z690 Unify packs an incredible power design. It harnesses all that power using premium digital PWM paired with massive 19+2 phases (each phase holds a 105A). MSI Titanium Choke III and Dual CPU Power Connectors are also included for maximum performance. With regard to the cooling solution, you will notice that all important parts on this motherboard are covered with heatsinks. There is an aluminum cover, a VRM heat pipe, an M.2 Shield Frozr to ensure that the M.2 SSDs are cooled effectively, 7W/mK thermal pads, and an aluminum backplate to help heat dissipate fast.

This motherboard also has tons of connectivity options including 6x SATA 6Gb/s ports, 5x M.2 slots, a total of 8x USB 3.2 Gen2 ports (Gen2 Type-A & 1x Gen2x2 Type-C) at the rear, and 2x USB 2.0 ports. For your PCIe devices, there are 2x PCIe 5.0 x16 slots with Steel Armor reinforcement to prevent GPU sag under heavy load and 1x PCIe 3.0 x4 slot.

The DDR5 memory support is a huge step up from the DDR4 that is common in most builds today. It supports higher RAM speed and can achieve even better performance when paired with the right hardware. The MSI MEG Z690 Unify was designed to take advantage of the latest DDR5 memory, so it’s perfect for this build, and an excellent motherboard overall.

DDR5 Memory – G.Skill Trident Z5 RGB 6000MHz 32GB CL36

G.Skill Trident Z5 RGB 6000MHz 32GB CL36

For the RAM, we have 32GB of DDR5 Trident Z5 RGB memory from G.Skill. It was designed specifically for 12th gen Intel and newer to provide the best performance.

The Trident Z5 RGB memory modules offer ultra-fast speeds of up to 6000MHz, along with high-density 32GB kits for extreme performance and capacity. With regard to CAS latency, it comes in at CL36. Also, it has XMP 3.0 support which makes it just as easy to use as any other DDR4 memory module. All you have to do is set it and go, and the memory will automatically adjust to the correct settings for your motherboard and CPU. Additionally, XMP 3.0 allows two user-defined profiles to be saved in the memory module, so you can take your favorite settings with you wherever you go.

The G.Skill Trident Z5 RGB RAM also comes with a very attractive heat spreader. The dual-texture heat spreader design is unique and looks great, while the RGB lighting is smooth and provides plenty of options for customization using the G.SKILL lighting control software or any supported third-party software. Overall, this RAM is a great choice for any Core i9-12900K Build, it provides excellent performance and looks.

CPU Cooler – MSI MEG CoreLiquid S360

MSI MEG CoreLiquid S360

The Core i9-12900K doesn’t include a bundled cooler, so you’ll need to buy one separately. The MSI MEG CoreLiquid S360 is a great option, as its performance-oriented and has a stylish design.

The MSI MEG CoreLiquid S360 comes with a 360mm radiator and has three Silent Gale P12 fans, which are designed for silence and offer great performance. The fans on the MSI MEG CoreLiquid S360 can spin at up to 2000 RPM, which can output a maximum airflow of 56.2 CFM. They also have a noise level of 22.7 dBA, so they won’t be too loud and feature a Hydro-Dynamic Bearing (HDB), which provides a longer lifespan and better performance. Finally, a 60mm fan is placed within the water block, which is designed to help dissipate heat from the M.2 SSD, CPU VRMs, and other surrounding components.

One feature that stands out on the MSI MEG CoreLiquid S360 is its 2.4″ IPS screen. It is capable of displaying a wide range of hardware system information such as CPU temperature, system clock, and live weather. You also have an option to put customizable graphics. So, it is a great way to monitor your system’s performance, as well as to easily customize the look of your system’s cooling solution. It’s a great addition that makes using the MSI MEG CoreLiquid S360 a more enjoyable experience.

The MSI MEG CoreLiquid S360 is an excellent CPU cooler for the Core i9-12900K and would be a great choice for this high-end PC.

Main Storage – Sabrent 1TB Rocket

Sabrent 1TB Rocket

For the main drive of this PC, we’ve chosen the Sabrent 1TB Rocket. It provides plenty of storage for a boot drive and other frequently used apps, though there is a 2TB version if you need more space.

This Sabrent 1TB Rocket features PCIe 4.0 interface for top-of-the-line performance and is compliant with NVMe 1.3, meaning it will take full advantage of the latest storage technologies. The Sabrent 1TB Rocket also boasts a read speed of up to 3400 MB/s and a write speed of up to 3000 MB/s. It’s pretty fast and will ensure that your PC runs smoothly and without any lag.

The Sabrent 1TB Rocket also comes with a heatsink. The heatsink is made of aluminum and helps dissipate heat, preventing the drive from overheating. Not all NVME SSD comes with a heatsink, so it’s a nice added bonus on this one. Plus, the Sabrent 1TB Rocket supports SMART and trims commands, ensuring long-term reliability and optimal performance. And finally, it features advanced wear-leveling, error correction code, bad block management, and over-provisioning technologies to help keep your data safe and healthy.

All of these features make the Sabrent 1TB Rocket a great choice for the main storage drive of this PC build. It’s fast, reliable, and comes with a heatsink.

Large Files Storage – Samsung 870 QVO

Samsung 870 QVO

This PC isn’t just for gaming but also for professional work and content creation, so having a dedicated storage drive for larger files is important. The Samsung 870 QVO is a great option for this and is available in different capacities from 1TB to 8TB.

The Samsung 870 QVO uses a SATA III interface and has a sequential read speed of 560 MB/s and a sequential write speed of 530 MB/s. It has an advanced ECC algorithm, which contributes to its stability.

There is also Samsung Magician software, which is a powerful tool for managing and optimizing your drive. The program is updated regularly, and it contains tools that monitor the health and condition of your hard drive.

For storage, it provides everything you need – a good storage drive for large files overall.

Power Supply – Thermaltake Toughpower GF1 850W

Thermaltake Toughpower GF1 850W

We will be using Thermaltake Toughpower GF1 850W. It’s an 850W PSU, which should be enough to power this entire build with some headroom for future upgrades and addition.

The Thermaltake Toughpower GF1 850W is an 80 plus gold certified PSU. This means that it delivers up to 90% efficiency, making it a very efficient and reliable power supply. It also features Japanese capacitors, which offer the highest stability, reliability, and durability. The included 140mm hydraulic Bearing fan is extremely quiet and efficient, making it the perfect choice for this build. It also features a Smart zero fan mode, which automatically regulates the fan speed based on power consumption. This ensures that the fan only operates when needed, resulting in near-silent operation. Lastly, it’s fully modular, so you can choose only the cables you need, which makes cable management a breeze.

The Thermaltake Toughpower GF1 850W is an excellent choice for powering this high-end Core i9-12900K build. It’s extremely efficient, reliable, and quiet, and it comes with all the features you need to keep your system running smoothly.

Chassis – Corsair 5000D

Corsair 5000D

Aside from looks, another thing we prioritize before choosing the case for this build is the airflow. We decided to go with the Corsair 5000D, as it provides both minimalist design and great airflow.

The Corsair 5000D is an excellent case for this high-end PC build. It has a simple design and a high-performance steel front panel that provides tremendous ventilation to your system. Even under heavy use, your computer may stay cool thanks to this feature. It also supports a 360mm radiator on top and front, so the MSI MEG CoreLiquid S360 liquid cooler that we used on this PC will work just fine.

There are also two CORSAIR 120mm AirGuide fans included, which make use of anti-vortex vanes to focus airflow and improve cooling. However, if you wish to replace them with something much better, we recommend getting the Corsair LL120 RGB case fans. These fans are PWM, which allows for dynamic speed changes between 600 rpm and 1,500 rpm. This means you can set the fans to run at a low speed when you’re working or gaming quietly, or have them ramp up to provide maximum airflow when needed. Also, with 16 individually illuminated RGB LEDs in each fan split between two separate light loops, it allows you to create some amazing lighting effects that will really highlight your PC, so they are great system fans that match the entire system.

The Corsair 5000D also has a great cable management system that makes it simple to route your wires through a single hidden channel. There’s also plenty of room behind the motherboard for all of your cables, so you can keep your PC looking neat and tidy.

All in all, the Corsair 5000D is an excellent case for this high-end Core i9-12900K PC Build, and it provides great airflow, excellent cable management, and an aesthetically pleasing design that gamers and professionals will like.

Periperhals for this PC Build


  • Resolution: 3440x1440p
  • Refresh Rate: 240hz
  • Panel: IPS
  • Size: 27"
Check on Amazon

  • Resolution: 3840x2160p
  • Refresh Rate: 144hz
  • Panel: IPS
  • Size: 28"
Check on Amazon
Alloy Origins CoreHyperX Alloy Origins Core

  • Switches: Mechanical Red Switch
  • Brand: HyperX
Check on Amazon
Sensei TenSteelSeries Sensei Ten

  • DPI: 18,000
  • Switches: Mechanical
Check on Amazon

Quad-HD Monitor – ASUS ROG Swift PG279QM


This PC build will give you a competitive edge in 1440p gaming so the ASUS ROG Swift PG279QM monitor is a great choice.

The monitor features a 240Hz refresh rate to deliver smooth, tear-free gaming, and has support for NVIDIA G-SYNC. The NVIDIA Reflex Latency Analyzer is also included in the monitor, which will provide you with an accurate reading of system latency for the first time. This can help you optimize your gaming settings and ensure that your system is operating at peak performance. The ASUS Fast IPS technology also enables a 1ms response time, so you’ll be able to enjoy quick and responsive gameplay with high frame rates.

In addition to its fast response time, the ASUS ROG Swift PG279QM also features HDR technology with DisplayHDR 400 certification. This will provide you with exceptional contrast and color performance, making it the perfect monitor for gaming, multimedia, and creative work.

Overall, the ASUS ROG Swift PG279QM is an excellent choice for a Quad-HD monitor. It is a great gaming monitor to pair with the GeForce RTX 3080 Ti, and it really suits the rest of the PC build.

4k Gaming – ASUS TUF Gaming VG28UQL1A


The ASUS TUF Gaming VG28UQL1A is a great choice if you want to play on 4K resolution.

This monitor is great for 4K gaming with a fast response time of 1ms and a high refresh rate of 144Hz. It also features ASUS Extreme Low Motion Blur Sync (ELMB Sync) technology to eliminate ghosting and tearing as well as NVIDIA G-SYNC Compatible and AMD FreeSync Premium for seamless gaming. Additionally, it has exclusive Variable Overdrive technology to ensure smooth visuals with high frame rates.

The ASUS TUF Gaming VG28UQL1A also features high dynamic range (HDR) technology with 90% DCI-P3 professional color gamut and DisplayHDR 400 compliance. This provides excellent color performance, with a wider range of colors that can be displayed, as well as more accurate details in dark and bright scenes.

If you decide to use this PC for 4K gaming, then you won’t go wrong with the ASUS TUF Gaming VG28UQL1A, it’s a great 4K monitor overall.

Keyboard – HyperX Alloy Origins Core

HyperX Alloy Origins Core

For the keyboard, we have the HyperX Alloy Origins Core. It has not just great looks but also excellent comfort and durability.

The keyboard uses HyperX mechanical switches, which are rated for 80 million keystrokes. This ensures that you will be able to use it for a long time without any issues. It has a full aircraft-grade aluminum body that makes it durable and also very portable. The design is very compact, and you can easily detach the cable if you need to take it with you on the go. It also comes with excellent RGB lighting that has dynamic effects that will make your gaming experience even more immersive. You can also customize the lighting further using the HyperX Ngenuity software.

The combination of looks, excellent comfort, and long-term reliability makes this HyperX Alloy Origins Core a well-rounded motherboard that really suits this high-end Core i9-12900K PC Build.

Mice – SteelSeries Sensei Ten

SteelSeries Sensei Ten

The SteelSeries Sensei Ten compliments the keyboard we’ve picked. It is constructed using high-quality materials and comes with features suitable for gaming and professional work.

The mouse includes a TrueMove Pro optical gaming sensor which SteelSeries boasts as being one of the most accurate sensors on the market. The switches are mechanical and rated for 60 million clicks, ensuring that they feel solid from the first click to the last. There is also an onboard memory that can store your polling rate, up to 5 CPI settings, and key binds directly on the mouse. Additionally, it’s been engineered with high-grade polymer materials for durability and a long lifespan.

The SteelSeries Sensei Ten is a great mouse for any high-end builds overall, and will definitely perform exceptionally well in both gaming and professional work environments.

My Opinion About This PC Build

I would say it’s an excellent high-end PC build that will be able to tackle any task you put at it. If I had to rate it, I’d give it a 10/10. Gaming performance will be great thanks to the powerful CPU and GPU, while the addition of a 4K monitor (if you prefer it) will definitely take your gaming immersion to the next level. In terms of cooling performance, I am 100% sure that this PC build is well-ventilated even if you decide to stick with the stock fans that the case comes with.

All advanced features such as DDR5 and PCIe 5.0, Thunderbolt 4, USB Type-C, etc. are available in this build.

And as many loves to design their build to look more aesthetically pleasing, I believe this build hits the sweet spot in that area as well.

The only potential drawback of this build could be its price. But if you’re looking for a high-end PC build that will serve you well for years to come, then I say it’s definitely worth the investment.

Final Take

Well, there you have it, our Core i9-12900K PC build. This is quite an expensive setup, but it’s also a powerhouse that will handle anything you can throw at it. If you’re looking to build the best of the best, then this is the way to go.

All components and peripherals included in this build are carefully chosen to offer the best performance and value possible without incompatibility and bottlenecking issues.

Henz Llarves

Henz Llarves

I'm Henz Llarves and I'm passionate about writing and gaming. I've been building gaming PCs for a long time, and I've been writing about them as well.

2 1 vote
Article Rating
Notify of
Inline Feedbacks
View all comments
Would love your thoughts, please comment.x