Select any two CPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Core i5-6500T 2.5GHz Core i7-6700K 4-Core 4.0GHz
Red Dead Redemption 2 57% 9%
Call of Duty: Modern Warfare 16% 33%
Halo: Reach 35% 63%
Star Wars: Jedi - Fallen Order 73% 0%
Cyberpunk 2077 33% 23%
Borderlands 3 57% 9%
FIFA 20 12% 35%
Halo: The Master Chief Collection 57% 9%
eFootball PES 2020 29% 26%
Detroit: Become Human 34% 23%

In terms of overall gaming performance, the Intel Core i7-6700K 4-Core 4.0GHz is massively better than the Intel Core i5-6500T 2.5GHz 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 i5-6500T 2.5GHz was released less than a year after the Core i7-6700K 4-Core, and so they are likely to have similar levels of support, and similarly optimized performance 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 Core i5-6500T 2.5GHz and the Core i7-6700K 4-Core both have 4 cores, which is not likely to be a limiting factor for gaming.

The Core i7-6700K 4-Core has 4 more threads than the Core i5-6500T 2.5GHz. The Core i5-6500T 2.5GHz has one thread per physical core, whereas the Core i7-6700K 4-Core uses hyperthreading and has 2 logical threads per physical core.

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 i5-6500T 2.5GHz and the Core i7-6700K 4-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 1.5 GHz faster base clock rate, the Core i7-6700K 4-Core manages to provide massively better performance than the Core i5-6500T 2.5GHz. What is more, the Core i7-6700K 4-Core also manages to eke 1.1 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 i5-6500T 2.5GHz and the Core i7-6700K 4-Core have the same L2 cache size, but the Core i7-6700K 4-Core has a 2 MB bigger L3 cache, so in this area, it wins out over the Core i5-6500T 2.5GHz.

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 Core i5-6500T 2.5GHz has a 56 Watt lower Maximum TDP than the Core i7-6700K 4-Core (though they were created with the same size 14 nm manufacturing technology). What this means is the Core i5-6500T 2.5GHz 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).

The Core i5-6500T 2.5GHz and the Core i7-6700K 4-Core both have an on-board GPU, which means that they will be capable of running basic graphics applications (i.e., games) without the need for a dedicated graphics card.

For an in-depth GPU comparison, click on the GPU comparison icon that you can find throughout Game-Debate:

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 CodenameSkylake-SSkylake-S
MoBo SocketLGA 1151LGA 1151
Notebook CPUnono
Release Date01 Sep 201505 Aug 2015
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs4
CPU Threads4vs8
Clock Speed2.5 GHzvs4 GHz
Turbo Frequency3.1 GHzvs4.2 GHz
Max TDP35 Wvs91 W
Lithography14 nmvs14 nm
Bit Width64 Bitvs64 Bit
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size256 KBvs256 KB
L2 Cache Size1024 KBvs1024 KB
L3 Cache Size6 MBvs8 MB
Max Memory Size-vs32 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsHD i5 6500THD i7 6700K
Base GPU Frequency350 MHzvs350 MHz
Max GPU Frequency1100 MHzvs1150 MHz
DirectX12.0vs12.0
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 ReviewCore i5-6500T 2.5GHz is a Super Power Efficient CPU based on the 14nm, Skylake MicroArchitecture.

It offers 4 Physical Cores (4 Logical), initially clocked at 2.5GHz, which may go up to 3.1GHz and 6MB of L3 Cache.
Among its many features, Turbo Boost 2.0 and Virtualization are activated.

The processor integrates powerful Graphics called Intel HD i5 6500T, with 24 Execution Units, initially clocked at 350MHz and that go up to 1100MHz, in Turbo Mode which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 35W.

Its performance is very good and sufficient for any of today's games.
Core i7-6700K 4-Core 4.0GHz is a high-end CPU based on the 14nm, Skylake MicroArchitecture.

It offers 4 Physical Cores (8 Logical), initially clocked at 4.0GHz, which may go up to 4.2GHz and 8MB 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 integrates Powerful Graphics called HD i7 6700K, with 24 Execution Units, initially clocked at 350MHz and that go up to 1150MHz, in Turbo Mode which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 91W.

Its performance is exceptionally good and enough for even the most demanding applications.

Title

Body