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Gaming Performance Comparison

Recommended System Requirements
Game Ryzen 7 3800X 8-Core 3.9GHz Core i7-6900K 8-Core 3.2GHz
Cyberpunk 2077 64% 54%
Assassins Creed: Valhalla 52% 39%
Call of Duty: Black Ops Cold War 65% 56%
FIFA 21 66% 57%
Microsoft Flight Simulator 59% 48%
Watch Dogs Legion 52% 39%
World of Warcraft: Shadowlands 44% 29%
Horizon: Zero Dawn 59% 48%
Grand Theft Auto VI 41% 25%
Genshin Impact 73% 65%

In terms of overall gaming performance, the AMD Ryzen 7 3800X 8-Core 3.9GHz is massively better than the Intel Core i7-6900K 8-Core 3.2GHz 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 Ryzen 7 3800X was released over three years more recently than the Core i7-6900K 8-Core, and so the Ryzen 7 3800X is likely to have far better levels of support, and will be much more optimized and ultimately superior to the Core i7-6900K 8-Core 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 Ryzen 7 3800X and the Core i7-6900K 8-Core 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 AMD Ryzen 7 3800X 8-Core 3.9GHz and the Intel Core i7-6900K 8-Core 3.2GHz have the same number of threads. Both the Ryzen 7 3800X and the Core i7-6900K 8-Core use hyperthreading. The Ryzen 7 3800X has 2 logical threads per physical core and the Core i7-6900K 8-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 Ryzen 7 3800X and Core i7-6900K 8-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 Ryzen 7 3800X has a 0.7 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 7 3800X has a 2048 KB bigger L2 cache than the Core i7-6900K 8-Core, which means that it, at worst, wins out in this area, and at best, will provide superior gaming performance and will work much better with high-end graphics cards.

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 7 3800X has a 35 Watt lower Maximum TDP than the Core i7-6900K 8-Core, and was created with a 7 nm smaller manufacturing technology. What this means is the Ryzen 7 3800X will consume significantly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill significantly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

CPU Core Details

CPU CodenameZen 2Broadwell-E
MoBo SocketSocket AM4LGA 2011/Socket R
Notebook CPUnono
Release Date07 Jul 201901 Jun 2016
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores8vs8
CPU Threads16vs16
Clock Speed3.9 GHzvs3.2 GHz
Turbo Frequency4.5 GHzvs3.7 GHz
Max TDP105 Wvs140 W
Lithography7 nmvs14 nm
Bit Width64 Bitvs64 Bit
Max Temperature-vs105°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size512 KBvs512 KB
L2 Cache Size4096 KBvs2048 KB
L3 Cache Size32 MBvs20 MB
Max Memory Size-vs64 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 Size-vs-
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewThe Ryzen 7 3800X 8-Core 3.9GHz is a high-end CPU based on AMD's 7nm Zen 2 microarchitecture. It offers 8 physical cores (16 logical), initially clocked at 3.9GHz, which may go up to 4.5GHz using Precision Boost. It has an unlocked multiplier, therefore, it can be overclocked using traditional methods. As an AMD 'X' CPU, the Ryzen 5 3800X can use eXtended Frequency Range (XFR) for automated overclocking. It has 32MB 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 105W. It is power efficient compared to competitor processors. Among its many features are Simultaneous Multithreading, Cool n Quiet, CoolCore Technology, Extended Frequency Range (XFR), Pure Power and Precision Boost are enabled.Core i7-6900K 8-Core 3.4GHz is an Enthusiast Processor based on the 14nm, Broadwell MicroArchitecture.

It offers 8 Physical Cores (16 Logical), initially clocked at 3.2GHz, which may go up to 3.7GHz and 20MB of L3 Cache.
Among its many features, HyperThreading, Turbo Boost 2.0 and Virtualization are activated and the processor has its multiplier unlocked.

The processor DOES NOT Integrated any Graphics and has a rated board TDP of 140W.

Performance not known yet.