Intel Core i7-5820K 6-Core 3.3GHz
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Intel Core i7-5960X 8-Core 3.0GHz
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Gaming Performance Comparison

Recommended System Requirements
Game Core i7-5820K 6-Core 3.3GHz Core i7-5960X 8-Core 3.0GHz

In terms of overall gaming performance, the Intel Core i7-5960X 8-Core 3.0GHz 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.

Both the Core i7-5820K 6-Core 3.3GHz and the Core i7-5960X 8-Core 3.0GHz were released at the same time, so are likely to be quite similar.

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 i7-5960X 8-Core has 2 more cores than the Core i7-5820K 6-Core. 8 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 i7-5960X 8-Core, it would seem to be a decent choice.

The Core i7-5960X 8-Core has 4 more threads than the Core i7-5820K 6-Core. Both the Core i7-5820K 6-Core and the Core i7-5960X 8-Core use hyperthreading. The Core i7-5820K 6-Core has 2 logical threads per physical core and the Core i7-5960X 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 Core i7-5820K 6-Core and the Core i7-5960X 8-Core are from the same family of CPUs, and thus their clock speeds are directly comparable. With this in mind, it is safe to say that with a 0.3 GHz faster base clock rate, the Core i7-5820K 6-Core manages to provide slightly better performance than the Core i7-5960X 8-Core. What is more, the Core i7-5820K 6-Core also manages to eke 0.1 GHz higher frequency when being stressed by CPU-intensive applications.

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 Core i7-5960X 8-Core has a 512 KB bigger L2 cache than the Core i7-5820K 6-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.

Both the Core i7-5820K 6-Core and the Core i7-5960X 8-Core have the same TDP of 140 Watts, and were created with the same manufacturing size of 22 nm, which means they will affect your yearly electricity bill about equally.

Can I Run It

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CPU Core Details

CPU CodenameHaswell-EHaswell-E
MoBo SocketSocket 2011-3 / R3 / LGA2011-3Socket 2011-3 / R3 / LGA2011-3
Notebook CPUnono
Release Date29 Aug 201429 Aug 2014
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores6vs8
CPU Threads12vs16
Clock Speed3.3 GHzvs3 GHz
Turbo Frequency3.6 GHzvs3.5 GHz
Max TDP140 Wvs140 W
Lithography22 nmvs22 nm
Bit Width64 Bitvs64 Bit
Max Temperature67°Cvs67°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size768 KBvs512 KB
L2 Cache Size1536 KBvs2048 KB
L3 Cache Size15 MBvs20 MB
Max Memory Size-vs64 GB
Memory Channels-vs4
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 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.
Core i7-5960X 8-Core 3.0GHz is an extreme processor based on the 22nm, Haswell architecture.

It offers 8 Physical Cores (16 Logical), initially clocked at 3.0GHz, which may go up to 3.5GHz and 20MB 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.

It proves to be over 10% faster than Core i7-4960K. Its performance is exceptionally good and enough for even the most demanding applications.

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