03-30-2015 12:06 AM - last edited on 03-06-2024 08:14 PM by ROGBot
04-02-2015 03:29 AM
04-02-2015 07:11 AM
04-24-2015 09:29 AM
04-29-2015 11:08 AM
04-30-2015 02:00 AM
04-30-2015 04:19 AM
Raja@ASUS wrote:
Some captures below. Probe tips placed directly across MLC capacitor at back of socket with short ground lead to limit noise pickup and bandwidth limiting enabled on scope. Default VRM switching frequency. Load is around 300W generated via software:
LLC 7 Idle to load transition.
LLC7 load to idle transition.
LLC 9 is more strenuous on the VRM as the voltage is increased under load. The VRM handles this fairly well however and keeps overshoot fairly tight (50mv over load voltage level) - it's set this way to appease people that think voltage should not move when faced with a load. These images serve to show that it does move - the laws of physics rule. If running LLC 9, one just needs to bear in mind that the voltage will be higher than what is set under full load and will peak around 0.1V over what is set in UEFI briefly when transitioning from load to idle. The overshoot period is very brief - says a lot about how good the VRM solutions on these boards are. 🙂
LLC9 idle to load transition.
LLC9 load to idle transition.
I've posted these images to save people from getting into arguments over what to run. Pick what suits your mindset. If you care about the max voltage your CPU sees, Jjust offset the max you're willing to feed the CPU by the peak level. So if your max is 1.95V for VCCIN, you would use 1.85V in UEFI with LLC 9 as an example.
Do not ask me for more measurements as I have taken the setup apart and am loathe to go through with it again! I took the measurements above six weeks ago, not today. Might take a look at other things in the future on other products, but won't be revisiting this.
Enjoy!
07-08-2015 04:11 PM