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Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Core i9-9900KS 8-Core 4.0GHz Ryzen R7 1800X
Call of Duty: Modern Warfare 43% 34%
Borderlands 3 43% 34%
Cyberpunk 2077 51% 44%
FIFA 20 59% 53%
eFootball PES 2020 53% 46%
Gears 5 17% 4%
Ghost Recon Breakpoint 37% 27%
GreedFall 59% 52%
Control 47% 39%
NBA 2K20 59% 52%

In terms of overall gaming performance, the Intel Core i9-9900KS 8-Core 4.0GHz is massively better than the AMD Ryzen R7 1800X 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 i9-9900KS 8-Core was released over a year more recently than the Ryzen R7 1800X, and so the Core i9-9900KS 8-Core is likely to have better levels of support, and will be more optimized for 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 i9-9900KS 8-Core and the Ryzen R7 1800X both have 8 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 i9-9900KS 8-Core 4.0GHz and the AMD Ryzen R7 1800X have the same number of threads. Both the Core i9-9900KS 8-Core and the Ryzen R7 1800X use hyperthreading. The Core i9-9900KS 8-Core has 2 logical threads per physical core and the Ryzen R7 1800X 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 i9-9900KS 8-Core and Ryzen R7 1800X 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 i9-9900KS 8-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 Ryzen R7 1800X has a 2048 KB bigger L2 cache than the Core i9-9900KS 8-Core, but on the other hand, it is the Core i9-9900KS 8-Core that has a 16368 MB bigger L3 cache than the Ryzen R7 1800X. In this case, the L2 size is probably what counts, so the Ryzen R7 1800X is likely superior in this area.

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.

The Ryzen R7 1800X has a 10 Watt lower Maximum TDP than the Core i9-9900KS 8-Core (though they were created with the same size 14 nm manufacturing technology). What this means is the Ryzen R7 1800X will consume slightly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill slightly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

The Core i9-9900KS 8-Core has an on-board GPU, which means that it will be capable of running basic graphics applications (i.e., games) without the need for a dedicated graphics card. The Ryzen R7 1800X, however, does not, and you will probably have to look for a dedicated card if you wish to use it at all.

For in-depth GPU comparisons with the Intel UHD Graphics 630, click on the following GPU overview comparison icon (visible throughout Game-Debate), and choose a GPU from the list to compare against:

On-board GPUs tend to be fairly awful in comparison to dedicated cards from the likes of AMD or Nvidia, but as they are built into the CPU, they also tend to be cheaper and require far less power to run (this makes them a good choice for laptops). We would recommend a dedicated card for running the latest games, but integrated GPUs are improving all the time and casual gamers may find less recent games perform perfectly acceptably.

CPU Core Details

CPU CodenameCoffee Lake RZen
MoBo SocketLGA 1151Socket AM4
Notebook CPUnono
Release Date26 May 201902 Mar 2017
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores8vs8
CPU Threads16vs16
Clock Speed4 GHzvs3.6 GHz
Turbo Frequency5 GHzvs4 GHz
Max TDP105 Wvs95 W
Lithography14 nmvs14 nm
Bit Width64 Bitvs-
Max Temperature100°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size512 KBvs512 KB
L2 Cache Size2048 KBvs4096 KB
L3 Cache Size16384 MBvs16 MB
Max Memory Size-vs-
Memory Channels-vs-
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel UHD Graphics 630
Base GPU Frequency350 MHzvs-
Max GPU Frequency1150 MHzvs-
DirectX12vs-
Displays Supported-vs-
Comparison

CPU Package and Version Specifications

Package Size37.5 mm x 37.5 mm x 4.4 mmvs-
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewThe Intel Core i9-9900KS 8-Core 4.0GHz is a top-end CPU based on a refinement of the 14nm++ Coffee Lake microarchitecture. It offers 8 physical cores (16 logical), initially clocked at 4.0GHz, which may go up to 5.0GHz using 8 cores with Turbo Boost. The i9-9900KS has 16MB of L3 Cache, 2MB L2 Cache and 512KB L1 Cache.. Among its many features, HyperThreading, Turbo Boost 2.0 and Virtualization are activated and the processor has its multiplier unlocked. Intel's i9-9900KS utilises an integrated Intel UHD Graphics 630 internal graphics processor initally clocked at 350 MHz with a maximum boost speed of 1.2GHz This Core i9-9900KS CPU offers the fastest gaming performance of any Intel CPU as of 2019, 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.The Ryzen R7 1800X is a very high-end CPU based on AMD's 14nm, Zen microarchitecture. It offers 8 physical cores (16 logical), initially clocked at 3.6GHz, which may go up to 4.0GHz using Turbo Boost. It has an unlocked multiplier therefore it can be overclocked using traditional methods. It has 16MB of L3 Cache. Level 3 cache is a static memory bank of a processor and it is used to feed it instructions. This processor also supports DDR4 based RAMs with maximum memory support of 64GB. It has a maximum Thermal Power Design of 95W. It is on par with competitor processors. Among its many features, Simultaneous Multithreading, Cool n Quiet, CoolCore Technology, Extended Frequency Range (XFX), Pure Power and Precision Boost are enabled. It doesn't feature an integrated GPU. This CPU is likely to offer excellent computational performance and will not be the bottleneck in any modern gaming PC.

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