09-11-2017 10:56 PM - edited 09-13-2017 06:08 AM
So, as the title says, I am a proud owner of legion y520 with i7 cpu
laptop is running so cool that I decided to overclock the gpu a little bit.
Thing that I want to note as well is that cpu is running in mid/high 70
So I did an undervolt since I noticed that cpu will downclock from 3.4 to 2.6 once it goes above 75C
with unervolt of 135 it is on stable clock of 3.4 and the temps dont go over 72C
as for gpu the temps are pretty much low not exceeding 65C so I decided to to a core overclock by 200 and cache by 500, the temps actually dont change much for gpu so I am happy.
End result is that I got 5-15fps extra on BF1 on ultra setting
so, I want to get your oppinion if you think that this is safe since the temps are looking good
what is your experience with your legion?
///// EDIT//// Update
So I read that cpu will throttle ehen ever it tries to pull more than 45W?
It makes sense to an extent but I cant confirm this as of yet
Solved! Go to Solution.
09-13-2017 03:06 AM
hi. I think the limit of 2.6 ghz is because the cpu is not used at its's full performance(like 50%) . i run benchmarking on intel extreme tuning utility and it reached 81C with 3.4 ghz(without cooler pad), no more being stuck at 2.6ghz and 70C. the fps you've got are because you oc the gpu. and btw, what tool did you use for gpu oc ?
09-13-2017 03:16 AM
09-13-2017 08:59 AM - edited 09-13-2017 09:00 AM
i just undervolted by 0.130. i run prime 95. at normal voltage i get 70 with 2.7 ghz. at -0.130V i get 81-83 at 3.4 ghz. sometimes it just decides that the temperature is too much so it goes 65 with 2.7 ghz. the tests were done using deepcool x6 cooling pad and no turbo mode ( as it's just too noisy). also, i have legion y720.
09-13-2017 09:07 AM
09-13-2017 09:12 AM
Bear in mind this is all at your own risk.
Traditionally, the system is throttled through Intel DPTF (Dynamic Platform and Thermal Framework) at the OS level, and then had a emergency hi-level thermal throttle caked into the BIOS / processor die. Intel SpeedStep also contributes by dynamically changing your core speed as needed. Usually this one isn't an issue, but it could cause studders if not ramping up quick enough.
Although I don't recommend usually disabling DPTF, I ended up doing it on my Yoga 3 Pro to get the clock to run above 900mHz all the time. It resulted in the laptop running MUCH warmer, but I wasn't bottlenecked all the time. If you are finding the 65C threshold too low, try removing the DPTF software and driver, and disable it in the BIOS (if shown). Just be aware that the laptop will run warmer, and if it gets too warm, will shut off when tjmax is achieved.
09-13-2017 09:20 AM
09-13-2017 09:31 AM
Glad to hear!
I tore mine down a bit, and the display looks to be a standard DP connection, so there may be a way in the future to retrofit in a 4K display (I have to revisit my knowledge of displayport. I know the old LVDS stuff was a nightmare by comparison...)
09-13-2017 09:40 AM