Can the w520 use 1.35v ram at 1.35v or does it auto volt to 1.5. Can you underclock the intel gpu?

It's probably the only thing that is warm on my laptop. Also is there a tool to underclock the integrated gpu.
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I think you can set the performance level of the integrated GPU in the intel Graphics Control applet.
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

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