# Intel Core i5-7640X X-series Desktop CPU: Intel Also called intel core i5-7640x x-series, core i5-7640x x-series, i5-7640x, core-i5-7640x-x-series Intel, Desktop CPU, Kaby Lake Intel Core i5 desktop processor on Kaby Lake, with 4 and 6 MB L3 at 112 W TDP on a 14 nm process addressing up to 64 GB and Yes. ## What you need to know Intel Core i5-7640X X-series is a legacy desktop cpu. Intel Core i5-7640X X-series launched in April 1, 2017., Core and thread counts are not recorded here on Kaby Lake, dropping into the FCLGA2066 socket. Treat the spec table as the facts. Age alone does not tell you to throw it out. - **Still good?**: Only if the workload is light **Product age**: 9 years old **Upgrade pressure**: Moderate Feex says If apps already feel slow, check RAM and storage before you blame this CPU by name alone. ## What this hardware means today Age and usefulness are not the same number. This page keeps them separate. - **Performance today**: **Average.** Average for the class when RAM, storage, and the GPU keep up. **Product age 9 years old**: **Legacy.** Launched April 1, 2017. Newer platforms exist. That does not make this chip unusable by itself. **Support status **: **Supported.** Current Windows and current applications still run on this class of CPU. Platform BIOS support depends on the motherboard or laptop vendor. **Upgrade pressure **: **Moderate.** Upgrade pressure comes from platform features and specific CPU-bound work, not from the chip being unusable. ## Where does it sit? Kaby Lake sits on Intel's recent Core timeline. Later desktop branding moved toward Core Ultra. 11th Gen 12th Gen 13th Gen 14th Gen Core Ultra ## Performance context These are qualitative readings, not a fake 8.7 out of 10. Workload still wins. ### Gaming: Good Playable in lighter titles. A weak GPU will hide whatever this chip still has. ### Productivity: Average 4 cores cover office, browser, and compile work in this class. ### Multithreaded workloads: Average Thread count is not recorded on this sheet. ### General use: Good Everyday Windows use is not where most people notice this SKU first. ### Efficiency: Good Rated 112 W base power. That is a platform number, not a promise about your cooler. ## Should you upgrade? Probably not based on CPU performance alone. ### Upgrade makes more sense if - Your workload is strongly CPU limited - You need a newer platform for memory, I/O, or chipset features - You need substantially more multicore performance - You need newer connectivity that your current board cannot offer ### Upgrade makes less sense if - The GPU is the real bottleneck - Current applications are already responsive - The CPU rarely limits your workload ## Specifications Figures below follow the Feex Hardware Database record for this SKU. Fields without a recorded value are omitted. ### Processor Intel Core i5-7640X X-series is built on Kaby Lake using a 14 nm process. | Manufacturer | Intel | | --------------------- | ------------------------------ | | Family | Core i5 | | Architecture | Kaby Lake | | Generation | Intel Core X-series Processors | | Manufacturing process | 14 nm | | Segment | Desktop | ### Cores and threads Intel Core i5-7640X X-series has 4 cores. | Cores | 4 | | ----- | - | ### Clock speeds Base clock is 4.0 GHz. Boost reaches 4.2 GHz. | Base frequency | 4.0 GHz | | -------------- | ------- | | Max boost | 4.2 GHz | ### Cache Cache on this sheet is 6 MB L3. | L3 cache | 6 MB | | ----------- | ---- | | Total cache | 6 MB | ### Memory Intel Core i5-7640X X-series addresses 64 GB across 2 memory channels. | Supported types | DDR4 | | --------------- | ----- | | Max capacity | 64 GB | | Channels | 2 | ### Package and power Intel Core i5-7640X X-series uses the FCLGA2066 socket and a 112 W TDP. | Socket | FCLGA2066 | | ------ | ---------------------- | | TDP | 112 W | | PCIe | Revision 3.0, 16 lanes | ### Integrated graphics Intel Core i5-7640X X-series includes Yes. | Integrated graphics | Yes | | ------------------- | --- | ### Market Intel Core i5-7640X X-series launched April 1, 2017. | Launch date | April 1, 2017 | | ----------- | ------------- | | Model | i5-7640X | ### Features Intel Core i5-7640X X-series records 20 instruction sets on this sheet. | Instruction sets | AES-NIAVX2AVXFMA64-bit (x86-64)BMI1BMI2F16CPCLMULQDQRDRANDRDSEEDSSE4.1SSE4.2x86-64-v3SSESSE2SSE3SSSE3x86-64-v2MMX | | ---------------- | ----------------------------------------------------------------------------------------------------------------- | | Security | Execute Disable (NX)Hardware RNGSGXTrusted Execution | | Virtualization | Extended Page Tables (EPT)VT-d (DMA Remapping)VT-x (Hardware Virtualization)Second-Level Address Translation | ## Compatibility | Socket | FCLGA2066 | | -------- | ------------------------------------------------------------------------------------------------- | | Board | A shared socket is not automatic compatibility. Check the motherboard CPU list and BIOS revision. | | Memory | DDR4, up to 64 GB | | Graphics | Yes | A shared socket is not automatic compatibility. Boards often need a BIOS update before a newer chip in the same socket will post. Cooler clearance, VRM quality, and power limits matter as much as the socket name. Read the memory list on the board. The CPU can list more standards than one motherboard will accept. ### No post after a CPU swap Clear CMOS only after you confirm the board list includes this SKU and the BIOS is new enough. A supported name on a box is not the same as a flashed board. ## Related These entities connect to this article. Type is shown on every link. [Processors: Hardware](https://feex.it/wiki/hardware/cpu) ## Sources and verification Reviewed by Feex editorial. Last verified August 2026 Status: Partially Verified. [How we research](https://feex.it/wiki/research). - [Feex Hardware Database ](https://foxhole.feex.it/cpu/intel-core-i5-7640x-x-series)ยท Specification source used for this sheet. CC BY 4.0. ## Was this article useful? A yes or no is enough. Pick a reason if you want, or add a short note. Quick facts The short identity of this page. Specs, sources, and the full story stay in the article. - **Manufacturer**: Intel **Family**: Core i5 **Architecture**: Kaby Lake **Socket**: FCLGA2066 **Launch**: 2017 **Status**: Legacy Partially Verified: Last verified August 2026 --- Source: [Canonical Feex Wiki page](https://feex.it/wiki/hardware/cpu/intel-core-i5-7640x-x-series/) [Developer guide](https://feex.it/wiki/developers/) | [API policy](https://feex.it/developers/api-policy/) | [Agent guidance](https://feex.it/wiki/llms.txt)