Best CPU under $400 – our top picks for gaming and productivity in 2024
Best CPU under $400, let's find one
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Are you looking for the best CPU for under $400? Then you have come to the right place. We all know that CPUs can be expensive, especially if you want an ultra-high-end CPU with lots of cores and threads. However, with Intel’s 14th Gen now available, it means some incredible chips can be picked up for peanuts compared to their launch prices, and we anticipate further savings as time goes on.
We will always keep this article updated with the latest products to make sure our recommendations are as accurate as they can be. We rigorously test a number of CPUs to provide the very best advice so you can build you dream PC in confidence. If you’re short on time, we strongly recommend the Intel Core i7-13700K or the AMD Ryzen 7 5800X3D as the best CPU for under $400. You may also want to check out our full best CPUs for gaming guide.
Best CPU for gaming under $400
Intel Core i7-13700KF
Intel Core i7-13700K
Cores
16
Threads
24
Base speed
P-cores 3.4 GHz / E-cores 2.5 GHz
Boost speed
P-cores 5.4 GHz / E-cores 4.2 GHz
Cache
24MB
TDP
125 W / 253 W boost.
- Great price to performance ratio
- Strong multi-core performance
- Lots of threads for an i7
- 13600K is better value for pure gaming
Our top pick for the best CPU under $400 is the Intel Core i7-13700KF. This processor features Intel’s hybrid core architecture and comes equipped with a total of 16 cores and 24 threads. It’s fantastic for gaming, and there are enough cores and threads to make this a fantastic all rounder for work, too.
On the CPU die, we see eight larger, hyperthreaded performance cores with a maximum clock speed of 5.4GHz, and eight smaller efficiency cores with a maximum clock speed of 4GHz. Because of these high figures, the processor has excellent single-thread performance, which translates to a great gaming experience for you. You’ll be able to play all the latest titles at high framerates without any lag or frame time inconsistencies. You will need to shell out on an expensive GPU to minimize the bottleneck, though, as this is a very strong processor.
The 13700KF lacks integrated graphics and can be overclocked. Overclocking isn’t the most practical, though, because this chip already consumes a monstrous 253 watts of power and runs hot. You would need a very strong (and expensive) cooling solution to keep it from throttling if you intend to overclock it. But if you’re okay with the hotter-than-usual thermals, you’ll find the 13700KF the best-performing chip within the $400 price point. Its gaming performance is comparable to that of the flagships, and its performance in productivity applications is just as impressive.
AMD Ryzen 7 5800X3D
AMD Ryzen 7 5800X3D
Cores
8
Threads
16
Max boost speed
4.5GHz
L3 Cache
96MB (64MB 3D V-cache)
TDP
105W
- Inexpensive
- Incredible performance
- 3D V-cache
- No cooler
- No native overclocking support
The best CPU for gaming by our reckoning is the Ryzen 7 5800X3D, as the newer generations will set you back a pretty penny. Great if you’re still rocking AM4. If you’re really only interested in gaming and are willing to compromise on performance in multithreaded workloads such as video editing, content creation, and rendering, the Ryzen 7 5800X3D is your best option under $400. Its gaming performance is comparable to (or only ever so slightly worse than) the 13700KF’s, but it is considerably cheaper.
This Zen 3 processor was released in April 2022. Its 3D V-cache enhancement allows it to outperform all but the fastest and most expensive flagship processors in gaming. The 5800X3D has 8 cores, 16 threads, and a maximum clock speed of 4.5GHz. On paper, those specs don’t really compare to those of modern $400 processors such as the 13700KF.
But what allows the 5800X3D to outperform processors with much higher clock speeds in gaming is its extra L3 cache. The R7 5800X3D has an incredible 96MB L3 cache. The cache is high-speed memory located on the CPU die. A larger cache size allows the CPU to hold more information close to its cores for faster processing, and this is something that benefits gaming particularly. Unfortunately, most other CPU-intensive applications don’t see significant benefits.
So as you would expect, performance in everything but gaming takes a hit. If you’re looking for a workstation processor or frequently deal with multithreaded workloads, going with an X3D processor is probably not the best call. For gaming exclusively, there are very few processors out there currently that can match the 5800X3D in raw performance.
Best CPU for productivity under $400
Ryzen 7 7700
The recently launched AMD Ryzen 7 7700 is a powerful eight-core, 16-thread processor that is well-suited for gaming and most other tasks except for professional-grade content creation. It boasts a single-die design like its counterpart, the AMD Ryzen 7 7700X, which eliminates the performance trade-offs that come with the more expensive 12 and 16-core CPUs with dual-die configurations, although these compromises are negligible in most cases.
AMD Ryzen 7 7700X
Cores
8
Threads
16
Base speed
4.5GHz
Boost speed
5.4GHz
Cache
32MB
Socket
AM5
- Inexpensive
- Suprisingly efficient at high-intensity workloads
- Strong iGPU
- No cooler
Despite its lower price, the Ryzen 7 7700 is highly efficient and only marginally slower than the existing Ryzen 7 7700X. The former model is also bundled with an AMD Wraith CPU cooler, which is not included in the latter, making it a great value for money.
While the Ryzen 7 7700 has a lower base clock speed of 3.8GHz compared to the 4.5GHz of the 7700X, it rarely operates at that lower speed when subjected to heavy workloads. The non-X model can be easily overclocked to achieve a maximum all-core speed of 5.3GHz with the included Wraith cooler.
Moreover, the Ryzen 7 7700 has a lower thermal design power (TDP) rating of 65W, which is significantly less than the 105W rating of the 7700X. However, users can activate Eco mode on the 7700X to bring down its power consumption to 65W, which has a minimal impact on performance but significantly reduces heat output. This makes the chip a fantastic choice and clear winner for those after a powerful chip for productivity.
What to look for in a high-end processor
If you’re setting your CPU budget to $400, you’re most likely looking for a high-end processor that can offer you top-notch performance across the board. You could find some older Core i9 and Ryzen 9 CPUs, also. But if you’re spending $400 processor, it makes the most sense to go with something from the latest generations.
You also want something with great multicore performance, or in other words, a processor with lots of cores and threads capable of running at a high clock frequency simultaneously. This is important because it allows your processor to multitask and process multithreaded workloads faster.
Is a $400 CPU worth it?
If you’re a professional in a field that requires high-performance computing such as video editing, 3D modeling, or scientific simulations, a $400 CPU may be worth it. These tasks demand a lot of processing power, and a higher-end CPU can significantly improve your workflow and efficiency. However, if you’re a casual user who primarily uses your computer for browsing the internet, streaming videos, or running basic applications, a $400 CPU may not be worth the investment. A less expensive CPU may suffice and provide enough processing power for your needs. If that’s the case, why not check out some of the best CPUs for LGA 1200 socket – there are some fantastic deals on older, but still powerful hardware.
Final word
In conclusion, the market for CPUs under $400 is highly competitive, but after considering various factors such as performance, efficiency, and price, the Core i7-13700K emerges as the best option. With its 16-core, 24-thread design, single-die configuration, and efficient power consumption, it offers excellent value for money and can handle most tasks, including gaming, with ease. Moreover, Its overclocking potential makes it a compelling choice for budget-conscious PC enthusiasts looking for top-notch performance without breaking the bank.
