PaulDoyle333

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 . 

Thanks dude , the little switch was the first thing I checked . The second option you suggested works a treat tho when I disabled (Intel Adaptive Thermal Monitor) . My CPU no longer reports 0.80ghz in the bios . Cheers man I don't need throttlestop anymore   :-) . The little red light stays on but system running at correct speed now without throttlestop :-) Thank you Thank you Thank you :-)

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 . 

Thank you very much i'm just glad i know exactly what the problem is as I was hoping it wasn't the CPU . Stupid LN2 Slow-Mode feature on a B150 board lol .System running perfect the last few days with throttlestop . Not ideal but what can you do i could RMA the board but it can be really time consuming .

Nope CPU is nice and cool never gets over 50c . VRM's and chipset are not over heating and system passed a 48hour stress test when i disabled BD PROCHOT in Throtlestop program . Im going pick up a Cheap h110 board just to test as i'm pretty sure its the mobo . I have tested the whole system with different ram different psu . Problem even exist when 0 drives are connected to system . I cleared C-MOS , loaded optimized defaults ect . I have tried everything . I just thought i share the issue as i have never had a issue like this before . Kinda sick i sold my Ivy bridge system to build this one . The only reason i picked a MSI board was because of the color scheme lol (Derp)

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 . 

Hi all
 
This is response from MSI Support regarding the issue, there's no need to use Throttlestop. Just one different setting in UEFI will turn that sensor off.
 
 
Hope that helps

Check this out: http://hardforum.com/archive/index.php/t-1762299.html
Could be a faulty CPU thermal sensor for the BD PROCHOT thing; it might be dedicated, so while windows might report otherwise, BD PROCHOT could be getting different signals, and cause throttling to occur.... doesn't look like you can reinstall it, or just delete it or anything....
If it is from windows, you can delete it, then run SFC (system file checker) to re-download it.
Only REAL fix looks like the one your currently using....

This is true.

that is what black ductape is for

BD PROCHOT stands for bi-directional processor hot.  This allows other sensors on your motherboard to signal the CPU which forces the CPU to use the minimum multiplier (8).  The CPU behaves exactly the same as if it was thermal throttling but in this case, the CPU temperature is fine.  On some motherboards, it can be either a temperature switch from the voltage regulator or a power consumption switch.  On your motherboard, it is very likely that the Slow Mode switch intended for LN2 users is failing.  The only fix is a new board.  This problem has nothing to do with Windows.  
 
ThrottleStop is the only free software available that lets a user disable the BD PROCHOT signal path.  When you uncheck BD PROCHOT, that blocks signals from the defective switch getting to your CPU.  A simple fix and after you disable BD PROCHOT, you should be able to exit ThrottleStop and the BD PROCHOT signal path will remain disabled.  ThrottleStop also has an option that you can add to the INI configuration file.
 
ExitTime=5
 
This option tells ThrottleStop to exit 5 seconds after it starts.  ThrottleStop will start up, fix the problem and then quietly exit.
 
Why is ThrottleStop "not ideal"?  Use the Task Scheduler to add it to the Windows start up sequence and you will not have to worry about this issue.  If you use stand by mode, you might have to run ThrottleStop again after you resume.  When properly setup, it is a very efficient program so some users prefer to leave it running, minimized to the system tray.
 
The i5-6500 is a locked CPU.  It can only use the highest multiplier when a single core is active and you also need to have at least the C3 C State enabled in the bios.  If the bios is not setting your CPU up correctly, using ThrottleStop might be helpful to fix that problem too.

No problem at all thanks for your suggestions . I'm at the stage now i'm just gonna use the throttlestop fix and torture the PC for the next week and see if i notice any issues if not my son can have it it will give me a excuse to tell the misses i need a upgrade .

Nope CPU is nice and cool never gets over 50c . VRM's and chipset are not over heating and system passed a 48hour stress test when i disabled BD PROCHOT in Throtlestop program . Im going pick up a Cheap h110 board just to test as i'm pretty sure its the mobo . I have tested the whole system with different ram different psu . Problem even exist when 0 drives are connected to system . I cleared C-MOS , loaded optimized defaults ect . I have tried everything . I just thought i share the issue as i have never had a issue like this before . Kinda sick i sold my Ivy bridge system to build this one . The only reason i picked a MSI board was because of the color scheme lol (Derp)

Sorry i should of mentioned that was the first thing I tried that is also not the issue . All my pc's are always set at high performance mode , I tried flashing 4 different bios that is available since the boards release and they all have the same issue . The Red L.E.D will fade on and off randomly once that red led comes on there is no way to get the CPU to go over 800mhz without disabling BD PROCHOT in throttlestop

love the look of that case

did you read the tile  :lol: "The Cheapest Gaming Build Possible ! £230"

d'aww look at its widdle fans and heatsinks

I wanted to build the lowest powered machine i could. This little htpc is on 24/7 and uses less power than a lightbulb .
 
The Beastly Specs : haha
 
Gigabyte AM1M-S2H Motherboard
Athlon 5350 Quadcore APU (25watts) 2.05 ghz
4GB 1600Mhz DDR3
500GB WD Blue HDD
Nvdia GT 730 1GB GDDR5 
Aerocool QS 101 Slim Case with 400watt PSU supplied
 
The GT730 never came with a low profile bracket so i mangled the bracket with a grips and squished her in there . 
The  cooler for the CPU is so small not much bigger than a poker chip .The little Athlon chip does not get hot at all so no need for anything bigger i suppose 
 
 
For £230' cheaper than most phones you would be surprised what this little fella can do .It plays a lot of games better than a Xbox One .
What a complete fail that console is !!! 
 
Anyway here is some pictures and screenshots . Tried recording game play but my frame-rate it games drops by half when recording and the little GT730 doesn't support shadowplay 
 

looking good man, nice job! So glad we made another PC fan

That looks really awsome

Sweet Build.
 
A wild Logan appears!

The only Problem i have is Those Unsleeved Cables though it's just my OCD kicking in but overall Clean Build 

Here is the rest of the pictures its up and running at 4.2 GHZ and the 670 Boosts all the way to 1300 mhz :)  . Temps on CPU on load is 67 and temps on GTX 670 is between 69-71 .Its a shame to put the side panel on hope the window panel is in stock soon .
I will add in the finishing touches when i get a few more (paper moneys)  :blink:
 
Got a 27 inch AOC passive 3D monitor on sale for 230 .The 3D actually works brilliant on games that support it .
Trine 2 looks EPIC in 3D also Dirt 3 and Crysis 3. 
 
 
Anyways only built a PC because of Linus&Slick i used consoles up till last year  :lol:  :lol:  :lol: i had no idea how powerful a PC could be .
This is my first build so go easy on me .
 
P.S love the forum and all the live streams 
 
Life would not be complete without my dosage of  LinusTech & Tek Syndicate 2 Brilliant channels  :D  :D  :D

Some good products there...
 
Love the colour scheme...
 
Looking good my friend.
 
Thanks for sharing.

It could use some lighting.
 
It's a shame there isn't a good blue SSD you could use instead of the 840.
 
Overall, it looks good.