In the current market, two types of CPUs exist: Box CPUs and Tray CPUs. Let's analyze their distinctions with Software Tips.

I. Box CPU Definition:

Box CPUs are processor models that, upon production, are enclosed in standard paper boxes. They come complete with accompanying accessories like fans and thermal paste (if applicable). These CPUs are securely packed with informative box prints detailing specifications and manufacturers. The packaging is crucial for transportation and market promotion, aiding in brand, model, and price identification. However, the extra packaging results in higher costs for Box CPUs.
II. Understanding Tray CPUs: OEMs and Bulk Purchase
For OEM manufacturers like HP, Dell, importing CPUs doesn't involve dealing with 10-20 units; they deal in thousands. Imagine employees of these OEMs unboxing thousands of CPUs—it's time-consuming, labor-intensive, generates a lot of waste, and most importantly, it's expensive. OEMs prioritize profit, so any cost-cutting measures are implemented. Instead of importing regular Box CPUs, they opt for Tray CPUs, also known as bulk CPUs. A Tray CPU typically includes dozens of units and comes 'naked,' meaning no box or accessories, just the CPU itself. The term 'Tray CPUs' in the market refers to CPUs without the usual packaging—only the CPU itself.

In addition, OEMs negotiate different warranty terms for Tray CPUs with product suppliers. This is exclusive information between OEMs and suppliers. Bulk purchasing in trays undoubtedly reduces costs, and warranty policies may differ as modern CPU warranties often involve the packaging (Series Number on the box).
III. Questions Surrounding Tray and Box CPUs
1. Authenticity of CPU Tray and CPU Box

The answer is a definite yes! Both are authentic CPUs; the only difference lies in the packaging and the targeted user group.
2. Is the Quality of CPU Tray Comparable to CPU Box?
Yes, indeed! If they share the same product code, they undoubtedly have the same quality and performance since they adhere to the manufacturer's standard specifications. However, some OEMs may request different specifications for Tray CPUs, but they assign a distinct product code for easy identification.
3. What sets apart the warranty of a CPU Tray from a CPU Box?
Currently, CPU Boxes are backed by a 3-year warranty (provided by AMD and Intel) for end users. The warranty support is facilitated through authorized distributors and affiliated stores. In simple terms, wherever you purchase the CPU Box, that's where you go for warranty service. Just remember to bring along the packaging to avoid any complications!
In contrast, CPU Trays operate on a completely different basis. Intel doesn't offer a standard 3-year warranty for CPU Tray; instead, the warranty terms (if any) depend on the agreement between the computer manufacturer that sold it and the OEM unit, as well as the product distribution network (as mentioned earlier).
4. Price Disparity between CPU Tray and CPU Box
Due to the comprehensive warranty coverage and fully equipped packaging, CPU Boxes come with a higher price tag compared to CPU Trays. However, the price difference isn't substantial, so don't hesitate too much. Unless absolutely necessary, opting for a CPU Tray might not be the wisest choice. While CPUs are known for their reliability, they are not entirely fault-proof. In unfortunate cases, if your CPU encounters issues, you might find yourself in a fix without a clear repair solution. CPUs, in reality, are notoriously difficult to fix, often impossible.
5. Distinguishing between CPU Tray and CPU Box
Typically, retail units explicitly label CPUs as either Box or Tray for customer convenience. However, some unscrupulous cases involve misrepresentation, where Boxed CPUs are deceitfully sold as Trays to maximize profits, relying on customers' limited understanding.
In the first scenario, to confirm whether it's a Box or Tray, reach out to the seller for accurate information. If you're skeptical about the information provided by the seller, you can independently determine your CPU type easily. If your CPU is recently purchased or within three years, visit the Intel Boxed Processor Verification website at http://www.intel.com/p/en_US/support/warranty
The website mentioned above will assist you in confirming whether your CPU falls under the BOX or TRAY category based on its Series.
For instance, after checking, my CPU, a boxed Core i5-7600, belongs to the L702D309 Series.

For CPU Tray models, Intel will indicate a lack of Series Number information on the warranty website.
As an example, refer to the image below where I randomly checked the Series 01 CPU Core i5-7500 in TRAY packaging on the official website. Series: L701D309

In this article, Software Tricks has guided you through the detailed and specific process of distinguishing between Tray and Box CPUs. Wishing you all a delightful day!