My Y510p i7-4700mq won't run at max frequency when stress using Prime95.
I have my i7 undervolted by -80mv voltage offset using XTU.
Multipliers are set to 34x 33x 32x 32x for 1 2 3 and 4 active cores.
But when running prime95 CPU max at 2.99GHz when it should max at 3.2GHz.
XTU show 100% CPU Current Limit Throttling but cpu has only use around 32-34 Watt only while it should throttle at 47watt tdp and it also hasn't reached temp limit yet as shown in the screenshot.
So can anyone tell me what's wrong with my system?
I'm running a recently cleaned Y510 (modded BIOS) with 4700MQ with TG Kryonaut on both CPU and GPU.
I set the CPU on XTU to 36x/35x/34x/34x @ -0.100v, Cache 36x @ 0.065v.
In games, It starts with 3.4 GHz and after sometime it drops to default 2.4 GHz.
On Prime95 v29.4 b8, It starts with 3.0 GHz (45w / Current Limit), and after 4.5 minutes it reaches 90°C, and the clock reduces to 2.4 GHz, and it stays stable. I stop the test after 15 minutes.
While I am trying to solve the Current Limit issue, I just brought a CPU Exhaust to (try) reduce the temps.
UPDATE: The Exhaust really works, at Prime95 the throttle jumped from 4.5 minutes mark to 6 minutes (it goes reasonably for 5 minutes, then the temps go crazy). 1 minute after hitting the 90°C throttle the temps go down to 69°C, allowing the clock to go up to 3.0 GHz again.
1) Using only Prime95: I run it for ~30 minutes, totally stable. The temps vary between 69°C (3.0 GHz kicks in) and 90°C (2.4 GHz throttle).
2) Using only GPUz Stress tool: After 15 minutes running the test, the CPU is stable at 3.45 GHz @ 69°C, and the GPU is stable at 59°C.
3) Prime95 and GPUz without the Exhaust: The CPU reaches 90°C and the GPU reaches 97°C, both start to trottle (the CPU goes even down to 800 MHz) and after 8 minutes the PC shutdowns.
4) Prime95 and GPUz with the Exhaust: I ran the test for 15 minutes. The CPU was stable at 2.40 GHz @ 72°C, and the GPU was Stable at 64°C.
UPDATE 2: After some test, and I figure out that the clock limit to my setup is 2.80 GHz (28x on 4 cores) during Prime95 Max Temp stress test, where the CPU maintain the clocks between 84°C ~ 86°C without throttling. If I set the multiplier to 29x, it reaches 90°C and throttles.
I still have to make some tests in games and with a external GPU (the internal GPU being totally disabled).