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The Best $2,500 Ultra-Extreme Mini-ITX Gaming PC Build – July 2021

By Ari Altman | Published June 25, 2021 | Updated June 25, 2021

Critical Update: if you actually want to build an ultra-high-end Mini-ITX PC any time before Fall 2021, you’ll need to use an older GPU you have on hand. That’s because GPUs are sold out worldwide due to the latest cryptocurrency mining crisis.

If you’re looking for a no-holds-barred extreme Mini-ITX Gaming PC Build in a sleek, compact chassis, this is the one for you! Our $2,500 Ultra-Extreme Mini-ITX Gaming PC Build might be dwarfed by standard towers, but it can easily keep up with them thanks to its truly extreme components. And amazingly, there is virtually no price premium for getting a system of this caliber down to a portable size, making this PC a pretty good value too.

For July 2021, the $2,500 Ultra-Extreme Mini-ITX Gaming PC Build features the awe-inspiring AMD Ryzen 7 5800X 8-core, 16-thread CPU that lays down the law when it comes to gaming.  The 5800X is supporting the incredible RTX 3080 10GB GPU from Nvidia, which obliterates previous-gen cards at a surprisingly-reasonable price. The only problem: it hasn’t been available at retail since its launch on Sept. 17, 2020, and we believe it will continue to be unobtainable until at least Fall 2021, if not longer.

Also on board is an amazingly-fast 2TB PCI-based solid-state drive, 32GB of high-speed DDR4-3600 RAM, and a massive 240mm liquid CPU cooler, which allows this mini-ITX rig to stay as cool as the big boys! Keeping the PC running is a 700W Platinum-rated power supply, and housing the system is the classy SilverStone SG15, which comes in at under 20 liters despite the capacity to hold all this gear, and more importantly, keep it all cool! Learn more about this awesome system and ask all your questions in our :

To support continued development of this guide, please use the affiliate links we provide in the guide. We provide links to Amazon, Newegg, or B&H in the US, and our Amazon links will auto-convert for our readers in Canada, the UK, and parts of the EU, with regional substitutions made automatically where necessary.

Required Components

  • Based on AMD’s revolutionary Zen 3 architecture, the Ryzen 7 5800X is a truly fantastic processor. It has 8 core and 16 threads all running from a single complex for maximum efficiency, with boost up to 4.7GHz. That means it’s actually the fastest processor available for single-threaded tasks, which many tasks still are.
    The Guru’s Tip

    Remember that this CPU does not have built-in graphics, so the video ports on the motherboard will not be functional.

  • This board has all the features you need for an ultra-high-end build, despite its reasonable pricepoint. It features dual M.2 PCIe slots, with the top slot supporting full Gen 4 speed, 2.5Gbps LAN, built-in 802.11ax wireless networking with Bluetooth, and six USB ports, including a Type-C port.
    The Guru’s Tip

    This is the board we use for our ITX test rig, and it's been flawless!

  • Nvidia launched the greatest GPUs of all time with its new RTX 3000 series, which blows away all previous video cards, including the once mighty RTX 2080 Ti. The RTX 3080 offers 30% higher performance for a lot less money, which is an unprecedented generational leap. This EVGA model is among the coolest-running, quietest, and best-looking models on the market, and it comes with unparalleled customer service.
    The Guru’s Tip

    Note that one of the advantages of the case we recommend for this build is that it can actually fit huge GPUs like this one!

  • For this build, you need lots of high-speed RAM, and this 32GB DDR4-3600 kit will do the trick! It not only offers a high frequency, but also has tight 16-18-18 timings that most other 3600 kits can only dream of.
    The Guru’s Tip

    We suggest skipping RGB kits for this build, as you won't be able to see the RAM from outside the case.

  • Harnessing the power of cutting-edge TLC V-NAND, the NVMe protocol, and the PCIe interface, this SSD provides amazing speed, along with an incredible 2TB of capacity! Just note that you’ll need a to install it.
    The Guru’s Tip

    This M.2 drive will slot right into the motherboard - no cables required!

  • This awesome 20-liter case allows you to max out an ITX build while still remaining very compact. It features a modern layout perfect for large video cards and powerful CPU coolers, optimizing not just for fit but for performance. The cooling in this case is exceptional, and the aluminum panels and high-quality filters definitely put it in a class by itself!
    The Guru’s Tip

    Learn more about building up this ITX case in our full review of the similar SG14 model shown at the top of this guide!

  • This 700W power supply has more than enough capacity to handle anything you can pack in this system. And thanks to its Platinum-rated efficiency, big 120mm fan, and zero-fan mode, it will also stay cool and quiet.
    The Guru’s Tip

    Just note that you must use the adapter below to mount this PSU in the case we recommend, as the case only includes standard ATX mounting holes. We strongly recommend an SFX-class unit over an ATX unit for this build because it provides more room for airflow inside the chassis and it comes with much shorter cables, which is a much better choice for a compact build.

  • This nifty little component is what allows you to use an SFX-class power supply in this build, despite the case having only an ATX power supply bracket.
    The Guru’s Tip

    Note that the adapter is offset, allowing you to provide more space between the PSU and another heat-generating component, like the video card.

  • To keep the a powerful CPU cool, we recommend nothing less than this 240mm liquid cooler, which will provide exceptional performance and sweet looks!
    The Guru’s Tip

    In a compact case, the ability to dump heat outside the case, rather than get it trapped inside, makes a huge difference. Just one thing to note: you should mount this cooler with the hose outlets at the back of the case. It doesn't look as slick, but we tried it the other way, and trust us, it's just too close to the fans for comfort!

  • Windows 10 was a big step up from Windows 8.1, and Microsoft continues to support Windows 10 users not only with regular security updates, but with major content releases every six months. And the USB version installs in under 5 minutes, meaning you can get right into using your system!
    The Guru’s Tip

    Windows 10 on USB sells out often. You can also get W10 via download - all you need is an 8GB or bigger flash drive to load the image onto.

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Optional Products

  • Best. Keyboard. Ever. And the only wireless mechanical keyboard with full RGB lighting on the market. This thing is a dream come true, so sleek, so responsive. Honestly, it’s in a class of its own.
    The Guru’s Tip

    This is the keyboard we've been using every day since it was released, and we'll never give it up!

  • Go for the best mouse in the business, period. Featuring a 20,000dpi sensor, Razer’s awesome HyperSpeed wireless system, and a perfect ergonomic design, this model can’t be beat! And in addition to its 100-hour battery life, it’s also incredibly light, at just 107g!
    The Guru’s Tip

    This mouse offers up to 100 hours of battery life!

  • Combining ultra-high-end performance with incredible comfort, this wireless headset from Corsair is the ideal all-day companion for listening to the latest market news. This headset also has an audiophile-grade microphone, perfect for teleconferencing.
    The Guru’s Tip

    This headset is our daily driver, and it's never let us down!

  • Without a doubt, our top pick among monitors to pair with this elite system is the equally-elite ultra-wide model. It offers a huge 34″ 3440×1440 IPS panel, a refresh rate of up to 144Hz, and G-Sync compatibility (via FreeSync) to achieve the smoothest possible gaming experience.
    The Guru’s Tip

    While 4K monitors get all the press, ultra-wides are where the real technological advancement is.

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Total Cost: $2510

(as of June 25, 2021)
Required Components
Optional Products