Intel Core i9-7920X 12-Core 2.9GHz
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Intel Core i7-5820K 6-Core 3.3GHz
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Gaming Performance Comparison

Recommended System Requirements
Game Core i9-7920X 12-Core 2.9GHz Core i7-5820K 6-Core 3.3GHz

In terms of overall gaming performance, the Intel Core i9-7920X 12-Core 2.9GHz is massively better than the Intel Core i7-5820K 6-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 i9-7920X 12-Core was released over a year more recently than the Core i7-5820K 6-Core, and so the Core i9-7920X 12-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 i9-7920X 12-Core has 6 more cores than the Core i7-5820K 6-Core. 12 cores is probably excessive if you mean to just run the latest games, as games are not yet able to harness this many cores. The cores in the Core i7-5820K 6-Core is more than enough for gaming purposes. However, if you intend on running a server with the Core i9-7920X 12-Core, it would seem to be a decent choice.

The Core i9-7920X 12-Core has 12 more threads than the Core i7-5820K 6-Core. Both the Core i9-7920X 12-Core and the Core i7-5820K 6-Core use hyperthreading. The Core i9-7920X 12-Core has 2 logical threads per physical core and the Core i7-5820K 6-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 i9-7920X 12-Core and Core i7-5820K 6-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 i7-5820K 6-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 Core i9-7920X 12-Core.

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 i9-7920X 12-Core and the Core i7-5820K 6-Core have the same TDP of 140 Watts, but the Core i9-7920X 12-Core has a lower lithography size, and so will affect your yearly electricity bills less adversely.

Can I Run It

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CPU Core Details

CPU CodenameSkylake-XHaswell-E
MoBo SocketLGA 2066Socket 2011-3 / R3 / LGA2011-3
Notebook CPUnono
Release Date28 Aug 201729 Aug 2014
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores12vs6
CPU Threads24vs12
Clock Speed2.9 GHzvs3.3 GHz
Turbo Frequency4.5 GHzvs3.6 GHz
Max TDP140 Wvs140 W
Lithography14 nmvs22 nm
Bit Width64 Bitvs64 Bit
Max Temperature-vs67°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size-vs768 KB
L2 Cache Size-vs1536 KB
L3 Cache Size16.5 MBvs15 MB
Max Memory Size-vs64 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

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CPU Package and Version Specifications

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Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewCore i9-7920X 12-Core 2.9GHz is a high-end CPU based on the 14nm Skylake-X micro architecture. It offers 12 physical cores (24 logical), initially clocked at 2.9GHz, which may go up to 4.4GHz with boost, and 16.5MB of L3 Cache. Among its many features, Turbo Boost 3.0 and Virtualization are activated and the processor has its multiplier unlocked. With a 140W TDP, the Core i9-7920X 12-core processor is very power hungry. The Intel Core i9-7920X is part of the first ever generation of Core i9 processors. These CPUs are designed to offer the fastest gaming performance of all Intel CPUs.Core i7-5820K 6-Core 3.3GHz is an extreme processor based on the 22nm, Haswell architecture.

It offers 6 Physical Cores (12 Logical), initially clocked at 3.3GHz, which may go up to 3.6GHz and 15MB of L3 Cache.
Among its many features, HyperThreading, Turbo Boost and Virtualization are activated and the processor has multiplier unlocked, meaning it can be overclocked easily.

The processor DOES NOT integrate any graphics. and has a rated board TDP of 140W.

Its performance is overall identical to Core i7-4930K and is thus exceptionally good and enough for even the most demanding applications.

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