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Clock Frequency Drift with Power Droop in GPU Chips

Jhaveri, Shaival G

Abstract Details

2013, MS, University of Cincinnati, Engineering and Applied Science: Computer Engineering.
GPU chips consume hundreds of watts of power when fully loaded as they undergo a large number of switching activities. This excessive switching activity can cause a sudden drop in power supply voltage, which is known as power droop. The main objective of this thesis is to understand the relationship between clock frequency and power droop. To establish the relationship we performed SPICE simulations and replicated the phenomenon of power droop to observe its effect on clock frequency. We define the observed effect of power droop to be Clock Frequency Drift Effect – wherein, the greater the power droop, the lower the frequency at which the clocks run. Industrial results are generated on a silicon GPU chip using Verigy 93K ATE and through LVx (Laser Voltage Extraction) control to strengthen the point of frequency degradation. On average, a frequency degradation of 18.33% was observed through the LVx results. We have also done a review on low capture power solutions to show how those solutions reduce toggle count which in turn mitigates the effect of power droop and thereby improves frequency.
Carla Purdy, Ph.D. (Committee Chair)
Bonita Bhaskaran, Ph.D. (Committee Member)
Xuefu Zhou, Ph.D. (Committee Member)
66 p.

Recommended Citations

Citations

  • Jhaveri, S. G. (2013). Clock Frequency Drift with Power Droop in GPU Chips [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378195126

    APA Style (7th edition)

  • Jhaveri, Shaival. Clock Frequency Drift with Power Droop in GPU Chips. 2013. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378195126.

    MLA Style (8th edition)

  • Jhaveri, Shaival. "Clock Frequency Drift with Power Droop in GPU Chips." Master's thesis, University of Cincinnati, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378195126

    Chicago Manual of Style (17th edition)