Intel Core i5-2400 Buyer's Guide
Positioning and generation
The Intel Core i5-2400 is a second-generation Core desktop processor (Sandy Bridge era) with four cores and four threads. FrameScope places it in the very old / entry level band. It has no Hyper-Threading, so its four threads are simply its four physical cores, which is a very basic configuration by today's standards.
The chip includes integrated graphics, so it can output a picture without a dedicated graphics card. That integrated graphics is only suitable for office work and video playback, not for gaming. Its role today is as an entry-level option that keeps an older PC running, not as a main processor for modern games.
If this is the processor in your current machine, expect that many recent games will struggle on it. Upgrading the whole platform usually makes more sense than swapping only the processor.
Key specs explained
This processor offers four cores and four threads. For games, the core count sets how much work can run at the same time. Without Hyper-Threading it cannot use multitasking to squeeze out extra throughput the way some newer CPUs do, so it falls behind in games that rely heavily on many threads.
The integrated graphics are a practical feature: the system still displays an image without a graphics card, which suits repair work, testing or plain document use. For gaming, though, a dedicated graphics card remains a necessary investment.
Clock speed, cache size and power figures are not specified in our data, so this assessment rests only on the known core count, thread count and integrated graphics.
Suitable games and resolutions
Across the 439 catalogue games with official requirements, this processor reaches the minimum requirement level for 416 of them. For 203 games it falls below the minimum, so many titles are out of reach even at the base level. It meets the official recommended level for 68 games, and is well above recommended for 18.
It suits best the indie and small simulation games that have modest demands, such as Timberborn, Peglin, Nine Sols and Sea of Stars: Sunset Edition, which reach the recommended level on it. Games like Hollow Knight: Silksong and Fields of Mistria only just clear the minimum. Titles such as Microsoft Flight Simulator (2020) 40th Anniversary Edition, Big Ambitions and Scrap Mechanic fall below the minimum, so a smooth experience should not be expected there.
Given this processor's generation and core count, a practical target is 1080p or lower, with graphics settings reduced as needed. This judgement is based on official requirement tiers rather than any performance measurements.
Compared with similar hardware
In FrameScope's tiering, the neighbours above it are the AMD FX-6300, Intel Core i3-4130 and AMD FX-8320. The neighbours below are the Intel Core i5-2300, Intel Core i3-3220 and AMD FX-4300. These comparisons only show that they sit in a similar band; they do not express exact performance gaps.
Overall, it occupies a similar position to other entry-level CPUs from its period. If you are comparing used prices, the differences between these neighbours usually come down to the platform, motherboard and price rather than the processor alone.
Buying new or used
This processor uses the LGA1155 socket, so make sure the motherboard uses the same socket and a compatible chipset before buying. It belongs to the launch generation of this socket, so older boards do not need a BIOS update specifically for it.
The boxed version includes a basic stock cooler; tray units do not.
This processor uses a land grid design: the pins are in the motherboard socket, so take care not to touch them when installing it.
Its multiplier is locked, so it cannot be manually overclocked.
If you buy used, check the chip for physical damage and ask for proof of purchase and warranty status. For new units, choose a seller that offers a full warranty.
Upgrade advice
If this processor is in your current build, an upgrade makes most sense when the games you want to play mostly fall below the minimum requirement. Within FrameScope's data, the upgrade targets worth considering are the Intel Core i5-3570K, Intel Core i5-4460 and Intel Core i7-2600. All sit clearly higher in tier and are the same or a newer generation.
When upgrading the processor, balance it against the graphics card and memory as well. Swapping only the CPU while the graphics card or RAM lags behind gives limited gains. If the budget is tight, identify the bottleneck first and decide the order of investment, which usually pays off more than replacing every part at once.