I recently purchased a Dell XPS 13 that has Intel i7-7Y75. From day 1, the computer constantly lags and has performance issues. And I'm just running basic MS Office programs like Outlook, Word, and Excel. But I can type faster than it process and there is constant lag, for example, when I simply enter data into cells in Excel.
I can't figure out how I just paid $2k+ for a top of the line laptop, yet I can't even run MS Office programs. This appears to be the worst CPU I've had in 15 years. What can I do?
Upon monitoring with tools like HWiNFO64, ThrottleStop, and Intel XTU I see that whenever the CPU gets under a load, the PL1 and/or PL2 throttles kick in and slows it way down to 400-800 Mhz.
Upon investigation, it appears that by design this CPU has a TDP of only 4.5W, with cTDP up to 7W and down to 3.5W.
TDP Level Limits shown in ThrottleStop, all geyed out, are:
Level TDP Min Max Ratio
TDP Level 1 3 0 0 6
TDP Level 2 7 0 0 16
It also has turbo boost up to 36X which should give me 3.6GHz. However, whenever turbo kicks in, it immediately hits the TDP level limits and throttles down. Essentially, the turbo boost is effectively useless. Worse yet, it doesn't just throttle down to its rated CPU rate of 1.3Ghz, but instead frequently throttles down to .4 to .8 Ghz rendering my laptop effectively useless and much slower than any laptop I've had for 15 years. I have never had an issue in the past with a computer lagging just during typing.
I'm no expert, but it appears that the needed voltage to run in turbo boost causes the processor to exceed the TDP Level Limts thus it throttles itself way down. This is like buying a Corvette with a Turbo that also has a governor that limits my speed to 40mph.
When running loads I see that as my Package Power gets over 5-6W (approaching 7W) that is then the PL1 and/or PL2 throttles kick in.
Am I undertanding this right? Something I'm missing? Anything I can do? Would undervolting it allow it to run in turbo boost mode w/o getting throttled so much?
Message was edited by: David Jones Added additional info about TDP Level Limits