When comparing Intel i7-4790K vs Intel i7-5820K, the Slant community recommends Intel i7-4790K for most people. In the question“What are the best CPUs for high-end desktop gaming?” Intel i7-4790K is ranked 1st while Intel i7-5820K is ranked 8th. The most important reason people chose Intel i7-4790K is:
Being a quad-core CPU means that hyperthreading is available, more so than an i5 thanks to the higher clock speeds and available cache. This means that games that take advantage of hyperthreading will perform better than with a CPU that does not have many cores or is just at a lower clock speed and has less cache available. While the jump in performance is not much for games that can only utilize a single core of the CPU, it still is a jump of about 2-3 frames over an i5 of the same generation.
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Pros
Pro Good performance and hyperthreading
Being a quad-core CPU means that hyperthreading is available, more so than an i5 thanks to the higher clock speeds and available cache. This means that games that take advantage of hyperthreading will perform better than with a CPU that does not have many cores or is just at a lower clock speed and has less cache available. While the jump in performance is not much for games that can only utilize a single core of the CPU, it still is a jump of about 2-3 frames over an i5 of the same generation.
Pro Easy to find cheap components
Being that this is a Haswell chip that uses the LGA 1150 socket, it is quite easy to find cheap motherboards and cheap RAM (DDR3) to use in those motherboards. This makes a good option as it is still a powerful chip comparable to even newer ones but allows for a wide selection of compatible parts. It also is a good choice for those that are already using a LGA 1150 compatible motherboard and would just like to upgrade from a less powerful CPU.
Pro Top performance in its price range
Tested against similar priced CPUs the 5820 edges out just about any other $400 CPU in 3DMark scores. While this may not translate to real world use at all times, this is a very high end CPU that will deliver for the money.
Cons
Con Becoming increasingly more difficult to find
More and more stores are not carrying this chip as newer generation chips are seeing their prices drop. This means it can be difficult to obtain, though there are a few places that it can still be picked up easily.
Con Somewhat dated
Based on the fourth generation of Intel's core architecture (Haswell) there are newer chips out there two generations ahead (6th gen Skylake). While comparing one to the next there are only slight improvements in the newer generations, but improvements all the same for close to the same price.
Con Expensive
The Core i7 5820K is more expensive than similar i7 processor from the Skylake generation.