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Gaming Performance Comparison

Recommended System Requirements
Game Core i9-9820X 10-Core 3.3GHz Core i9-10900X 10-Core 3.7GHz
Cyberpunk 2077 59% 64%
Hitman 3 45% 51%
Assassins Creed: Valhalla 45% 51%
Resident Evil 8 55% 60%
FIFA 21 62% 66%
Grand Theft Auto VI 33% 40%
Call of Duty: Black Ops Cold War 61% 65%
Genshin Impact 69% 72%
The Medium 30% 38%
Far Cry 6 36% 43%

In terms of overall gaming performance, the Intel Core i9-10900X 10-Core 3.7GHz is massively better than the Intel Core i9-9820X 10-Core 3.3GHz when it comes to running the latest games. This also means it will be less likely to bottleneck more powerful GPUs, allowing them to achieve more of their gaming performance potential.

The Core i9-10900X 10-Core was released less than a year after the Core i9-9820X 10-Core, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

Both CPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings (assuming they are accompanied by equivalently powerful GPUs).

The Core i9-9820X 10-Core and the Core i9-10900X 10-Core both have 10 cores. Games are not yet able to harness this many cores, so it is probably excessive if you mean to just run the latest games; however, if you intend on running a server with this CPU, it would seem to be a decent choice.

Both the Intel Core i9-9820X 10-Core 3.3GHz and the Intel Core i9-10900X 10-Core 3.7GHz have the same number of threads. Both the Core i9-9820X 10-Core and the Core i9-10900X 10-Core use hyperthreading. The Core i9-9820X 10-Core has 2 logical threads per physical core and the Core i9-10900X 10-Core has 2.

Multiple threads are useful for improving the performance of multi-threaded applications. Additional cores and their accompanying thread will always be beneficial for multi-threaded applications. Hyperthreading will be beneficial for applications optimized for it, but it may slow others down. For games, the number of threads is largely irrelevant, as long as you have at least 2 cores (preferably 4), and hyperthreading can sometimes even hit performance.

More important for gaming than the number of cores and threads is the clock rate. Problematically, unless the two CPUs are from the same family, this can only serve as a general guide and nothing like an exact comparison, because the clock cycles per instruction (CPI) will vary so much.

The Core i9-9820X 10-Core and Core i9-10900X 10-Core are not from the same family of CPUs, so their clock speeds are by no means directly comparable. Bear in mind, then, that while the Core i9-10900X 10-Core has a 0.4 GHz faster frequency, this is not always an indicator that it will be superior in performance, despite frequency being crucial when trying to avoid GPU bottlenecking. In this case, however, the difference is enough that it possibly indicates the superiority of the .

Aside from the clock rate, the next-most important CPU features for PC game performance are L2 and L3 cache size. Faster than RAM, the more cache available, the more data that can be stored for lightning-fast retrieval. L1 Cache is not usually an issue anymore for gaming, with most high-end CPUs eking out about the same L1 performance, and L2 is more important than L3 - but L3 is still important if you want to reach the highest levels of performance. Bear in mind that although it is better to have a larger cache, the larger it is, the higher the latency, so a balance has to be struck.

The maximum Thermal Design Power is the power in Watts that the CPU will consume in the worst case scenario. The lithography is the semiconductor manufacturing technology being used to create the CPU - the smaller this is, the more transistors that can be fit into the CPU, and the closer the connections. For both the lithography and the TDP, it is the lower the better, because a lower number means a lower amount of power is necessary to run the CPU, and consequently a lower amount of heat is produced.

Both the Core i9-9820X 10-Core and the Core i9-10900X 10-Core have the same TDP of 165 Watts, and were created with the same manufacturing size of 14 nm, which means they will affect your yearly electricity bill about equally.

CPU Core Details

CPU CodenameSkylake XCascade Lake-X
MoBo SocketSocket 2066Socket 2066
Notebook CPUnono
Release Date30 Nov 201830 Nov 2019
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores10vs10
CPU Threads20vs20
Clock Speed3.3 GHzvs3.7 GHz
Turbo Frequency4.1 GHzvs4.7 GHz
Max TDP165 Wvs165 W
Lithography14 nmvs14 nm
Bit Width64 Bitvs64 Bit
Max Temperature92°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size640 KBvs-
L2 Cache Size10240 KBvs-
L3 Cache Size16.5 MBvs19.25 MB
Max Memory Size-vs128 GB
Memory Channels-vs4
ECC Memory Supportnovsno
Comparison

CPU Graphics

Graphics
Base GPU Frequency-vs-
Max GPU Frequency-vs-
DirectX-vs-
Displays Supported-vs-
Comparison

CPU Package and Version Specifications

Package Size52.5 mm 45 mmvs-
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewThe Intel Core i7-9820X 10-Core 3.3GHz is a high-end CPU based on the 14nm Skylake-X micro architecture. It is competing against AMD's 2nd Gen Ryzen Threadripper processors. It offers 10 physical cores (20 logical), initially clocked at 3.3GHz which may go up to 4.1GHz with Turbo Boost enabled, and 16.5MB of L3 Cache. Among its many features are Turbo Boost Max 3.0 technology, Hyper-Threading, Virtualization is activated. As an 'Extreme' variant, this processor has its multiplier unlocked and overclocking is possible. With a 165W TDP, the Core i9-9820X 10-Core is very power hungry and will require a high-end PSU. This CPU is likely to offer exceptional computational performance and will not be the bottlenecked in any modern gaming PC. It will be able to play all AAA titles.The Intel Core i9-10900X 10-Core 3.7GHz is a high-end desktop (HEDT) CPU based on a refinement of the 14nm++ Cascade Lake-X microarchitecture. It is competing against AMD's 3rd Gen Ryzen Threadripper processors. It offers 10 physical cores (20 logical), initially clocked at 3.7GHz, which may go up to 4.7GHz using 4 cores with Turbo Boost 3.0. All core boost clock speeds of 4.3 GHz are possible across all 10 Cores simultaneously. The i9-10900X has 19.25MB of L3 Cache. Among its many features, HyperThreading, Turbo Boost 3.0, and Virtualization are activated. As an 'Extreme' variant, this processor has its multiplier unlocked and overclocking is possible. This Intel Core i9-10900X 10-Core 3.7GHz CPU offers fast gaming performance and will not be the bottleneck in any modern gaming PC. It will be able to play all modern games comfortably on ultra graphics performance at any supported resolution without being a hindrance to the accompanying GPU.