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Gaming Performance Comparison

Recommended System Requirements
Game Core i5-2400S 2.5GHz Core i5-670 3.46GHz
Hitman 3 84% 156%
Cyberpunk 2077 37% 90%
Assassins Creed: Valhalla 84% 156%
FIFA 21 28% 78%
Grand Theft Auto VI 125% 213%
Call of Duty: Black Ops Cold War 33% 84%
Resident Evil 8 52% 111%
Genshin Impact 4% 44%
Far Cry 6 116% 200%
The Medium 135% 227%

In terms of overall gaming performance, the Intel Core i5-2400S 2.5GHz is massively better than the Intel Core i5-670 3.46GHz 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 i5-2400S 2.5GHz was released over a year more recently than the Core i5-670 3.46GHz, and so the Core i5-2400S 2.5GHz is likely to have better levels of support, and will be more optimized for running the latest games.

The Core i5-2400S 2.5GHz has 2 more cores than the Core i5-670 3.46GHz. With 4 cores, the Core i5-2400S 2.5GHz is much less likely to struggle with the latest games, or bottleneck high-end graphics cards when running them.

Both the Intel Core i5-2400S 2.5GHz and the Intel Core i5-670 3.46GHz have the same number of threads. The Core i5-2400S 2.5GHz has one thread per physical core, whereas the Core i5-670 3.46GHz 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 i5-2400S 2.5GHz and Core i5-670 3.46GHz 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 i5-670 3.46GHz has a 0.96 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 probably a good indicator that the Core i5-2400S 2.5GHz is superior.

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 i5-2400S 2.5GHz has a 512 KB bigger L2 cache than the Core i5-670 3.46GHz, 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 Core i5-2400S 2.5GHz has a 8 Watt lower Maximum TDP than the Core i5-670 3.46GHz (though they were created with the same size 32 nm manufacturing technology). What this means is the Core i5-2400S 2.5GHz will consume slightly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill slightly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

The Core i5-2400S 2.5GHz and the Core i5-670 3.46GHz 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 CodenameSandy BridgeClarkdale
MoBo SocketLGA 1155/Socket H2LGA 1156/Socket H
Notebook CPUnono
Release Date09 Jan 201107 Jan 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs2
CPU Threads4vs4
Clock Speed2.5 GHzvs3.46 GHz
Turbo Frequency3.3 GHzvs3.73 GHz
Max TDP65 Wvs73 W
Lithography32 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature69°Cvs73°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size256 KBvs128 KB
L2 Cache Size1024 KBvs512 KB
L3 Cache Size6 MBvs4 MB
Max Memory Size-vs16 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel HD Graphics 2500 DesktopHD i5 670
Base GPU Frequency650 MHzvs733 MHz
Max GPU Frequency-vs-
DirectX11vs10
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 i5-2400S 2.5GHz is an energy efficient CPU based on the 32nm, Sandy Bridge architecture.

It offers 4 Physical Cores (4 Logical), initially clocked at 2.5GHz, which may go up to 3.3GHz and 6MB of L3 Cache.
Among its many features, Turbo Boost and Virtualization are activated.

The processor integrates weak Graphics called Intel HD Graphics 2000, with 6 Execution Units, initially clocked at 850MHz 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 65W.

It is a powerful Quad Core whose performance is good. It's thus capable of running most applications smoothly without any problem.
Core i5-670 3.46GHz is a performance CPU based on the 45nm, Nehalem architecture.

It offers 2 Physical Cores (4 Logical), initially clocked at 3.46GHz, which may go up to 3.73GHz and 4MB of L3 Cache.
Among its many features, Hyper-Threading, Turbo Boost and Virtualization are activated.

The processor integrates very weak Graphics called Intel i5 670, with XX Execution Units, clocked at 733MHz which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 73W.

It offers average performance. This means it will become a bottleneck in some demanding applications.