Thank you so much sir! This resolved my problem. I have the same mobo and processor. I bought it February of this year and its been working great until after 3 months of usage. It was so lag on games ive been playing (Tree of Savior, LOL and BnS) My FPS is dropping almost 5FPS and i thought its my Zotac GTX 970. I have tried everything, the newest and oldest Nvidia graphics driver on their website and also Windows 8, 8.1 and 10 and still the same. I was ready to RMA the GPU until i read this and Boom, my PC is back to normal and been working perfectly again. I cant thank you enuf! Kudos!
I recently build a new system with a i5 6500 ,MSI B150 Gaming M3 board . System has been running fine the last 3 months , last week I felt my mouse become real sluggish all of a sudden and a small red L.E.D turns on at the bottom of the board and drops the CPU to 800mhz . I have spent days troubleshooting the issue and have got to the bottom of it (Well Kind of)
This post is for anyone who might be having same issue as i could not find much on the internet about the problem . I tested the system with different PSU , RAM , HDD and fresh OS installs and problem still persisted . I had narrowed it down to motherboard or CPU . I re-seated CPU and checked if maybe there was damaged pins but everything looked perfect . The problem is completely random the system has never crashed and can go days of gaming with out a problem and then all of sudden randomly it will drop to 800mhz and RED LED on motherboard turns on .Temps are not a issue CPU never hits over 50c .Here is were it gets strange after some digging around forums I discovered a way to fix the issue although it is not ideal . It seems a feature called "BD PROCHOT" is what is causing the problem it is telling my CPU it or something is to hot and making the CPU downclock to 800mhz . I installed throttlestop and unchecked BD PROCHOT and it instantly fixes the issue . The system has passed a 48hour stress test and runs perfect but only when throttlestop is enabled I have checked all the temps are perfect too . I believe there is a sensor or something on the motherboard that is faulty and causing the CPU to downclock . There is a tiny switch on the motherboard called slow mode it is apparently used for LN2 overclocking' it drops the CPU to 800mhz in case of booting issues.I wish it was as simple as flicking a switch to fix my issue but unfortunately not 'my system will go hours running perfect and all of a sudden it's like that slow mode feature activates itself 'why that feature is on a B150 motherboard is beyond me but it is probably what is causing the issue .
Also the max turbo speed of my i5 6500 is 3.6ghz but when using the throttlestop fix for the 800mhz problem i am seeing my CPU jump up to 3.8 on one core .
This is the strangest system I have ever built and has pissed me off so much .
I think i will stick with Asus boards in the future .
Below are pics of system and and RED LED on motherboard , also screenshots of the 800mhz problem and the locked skylake 6500 running at 3.8ghz .
Did anyone ever have anything like this happen to them i have built many many systems over the last 3 years and never ran into this issue .
Jeff Mas got a reaction from Mrfabulous in Skylake system stuck at 800mhz
Jeff Mas reacted to PaulDoyle333 in Skylake system stuck at 800mhz
