Snapdragon 845 – HMP Explained!


HMP? Heterogeneous Multi-Processing. Didn’t sound familiar right. Yeah, its a very basic idea to understand but sounds jargony. Before we look at HMP let us look at what is new in Snapdragon 845 in a quick review below.

Amongst the most advanced developments we have seen quite far in 2018, one of the most under the hood improvements have been brought by Qualcomm by launching the Snapdragon 845 having a new QuickCharge Technology and Artificial Intelligence core for faster and accurate AI features for smartphones. In this post, we will dive deep into what 845 is offering and what’s still yet to be in comparison to the other chips in the market out there.

CPU (Kyro 385) HMI:

4 high-performance cores are clocked at 2.8 with a 400Ghz improvement from the last 835. It follows a new big.LITTLE microarchitecture which has the cores arranged in the following fashion inside the chipset. A new improved Hetrerogrnous multi-tasking as known as global task scheduling has been used for control and switch between the cores. This allows independent cores to be accessed and activated when required. Kirin 970 used in Huawei and Honor smartphones also use the same architecture.

Hexagon 685 DSP:

DSP never heard of that for a change. Well, yeah. This upgrade is worth to notice with a big addition of the new Qualcomm Snapdragon Neural Processing Engine (NPE). The NPE SDK allows developers to train their AI-based models offline and just run the model on the new NPE unit. This makes on device AI processing possible without having used a cloud service for processing the AI app.

In case if you are a developer, you can look into the SDK here: https://developer.qualcomm.com/software/snapdragon-neural-processing-engine-ai

QuickCharge 4+:

Quickcharge 4+ gives you the power to go from 0 to 50% in 15 mins on a 2750mAh battery. USB Type-C support has been added which extends the use of single USB port for Headphones as well as for charging the battery. A New Battery Saver feature that adds more protection to each layer throughout the charging process.

  • INOV (Intelligent Negotiation for Optimum Voltage) version 3 is an algorithm engineered so your portable devices can determine what power level to request at any point in time, which allows for optimum power transfer while maximizing efficiency. New to Quick Charge 4: a compatible device can request to within 20mV or lower the specific power needed to charge while also running advanced thermal algorithms for the case, battery, chip, and connector.
  • Dual Charge is supported by including a second power management IC in the device (e.g., a smartphone). Charging a device via Dual Charge divide the charge current, allowing for more efficient thermal dissipation and reducing charge time. Our third generation Dual Charge technology incorporates intelligent thermal balancing engineered for optimized power delivery.

Performance: 

Hints of Geekbench result of the Samsung S9+ model (SM-G965U1) shows us that it’s not great still with the results when compared with iPhone X (Apple A11 Bionic). But, the catch here is about the clock speed of the device. As 845 is designed to attain a maximum clock speed of 2.8Ghz, the result shows 8 cores running at 1.7Ghz. Since the result has appeared, it might seem like the device was a test unit and actual results might differ when the consumer unit shows up at the MWC 2018. On the other hand, Apple’s A11 scores a consistent average of 4000 for single and 10000 for multi-core.

Sources: Qualcomm Blog, News, Images, and Logos were properties of respective companies.

Aditya Karnam
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