Optimus III, GT650 and turbo mode disabled, is this true?

[Jbugman]

Throttlestop apparently gets around the lock on the inferno

J

[iaisel]

Have tried throttlestop 5 on my optimus III and it does indeed work to great effect, huge improvement. I would however be reluctant to use it or recommend it be used until we're sure the power supply can cope, I noticed the screen dimming slightly in rift with the proc up to 2.8ghz. Temp wise, not much of a jump, but I only ran it very briefly, may report back with more numbers after more extensive testing. Does anyone have any ideas about power consumption? I had heard the main reason it was done as mentioned earlier was to give the Gt650 more thermal headroom to use it's own turbo boost.

[iaisel]

noticed a couple of odd things with throttlestop; while it's turned off (monitoring mode) it often reports the cpu clock fluctuating around 1.6/1.8 ghz under no stress (pottering around windows etc.) Now I was aware of turbo boost being turned off for dGPU use, but cpu underclocking itself? maybe someone else has a better understanding of why this is. Also; when I launch throttlestop, even before it is switched on, nvidia optimus can't make it's mind up which gpu to use, every second it switches from iGPU to dGPU and back again. constantly. This sorts out if you launch a game, I just found it a bit odd that it was doing this while just looking at windows and throttlestop. Albeit I do have my optimus driver settings set up to prefer the GT650 wherever possible, and prefer image quality over performance. Thoughts anyone?

[iaisel]

have now been running Rift for a couple of hours with turbo boost on. So far temps have been fine, usually around 70 degrees for the processor and less for the GPU (mid-high 60's). The clock speeds have been fairly constantly 3.1ghz, dipping slightly to cool the processor when needed, as it did get up to a max of 90 at one point, but this came down quite nicely. Power supply does not appear hot, battery has still recharged (I'd run it down a bit before trying this exercise). I may invest in a cooling stand still, as I can't speak for the GPU's turbo, and as such, don't know if that has ramped itself down/off because of the extra heat, either way, it's a performance improvement.