Browse Prior Art Database

A Method of Enhancing Processor Performance via Ambient Temperature Sensors

IP.com Disclosure Number: IPCOM000007902D
Publication Date: 2002-May-02
Document File: 4 page(s) / 33K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that enables CPUs to run at a higher acoustic and thermal performance when external air temperature is lower than the current CPU design temperature of 35oC. Benefits include improved CPU performance.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

A Method of Enhancing Processor Performance via Ambient Temperature Sensors

Disclosed is a method that enables CPUs to run at a higher acoustic and thermal performance when external air temperature is lower than the current CPU design temperature of 35oC. Benefits include improved CPU performance.

Background

Currently, CPUs are designed to run at 35oC; however, it is well known that many PCs, if not most, operate in environments where the air is far below this temperature. In this situation, a CPU's performance is "capped", or lower than what it is capable of under a cooler environment. The fan industry already recognizes this, and achieves a lower fan acoustic noise by controlling the fan voltage/speed as a function of operating air temperature. However, this approach only benefits acoustics without improving thermal performance. Figure 1 shows the level of acoustic benefits increasing with decreasing ambient temperature, with neither improvement nor deterioration in thermal benefits. (Figure 1 is qualitative, and has no units.)

General Description

The disclosed method uses lower external air temperature to benefit both acoustic and thermal performance. Instead of a system where the air flow delivered by a fan is more or less constant, the system uses a CPU control scheme that allows the CPU to run at higher performance (higher frequency) with a decrease in external air temperature (i.e. frequency increases from 2.4 GHz to 2.8 GHz as TA decreases from 35oC to 25oC). The con...