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3930k refuses to stop throttling...

post #1 of 13
Thread Starter 
I am about to take this CPU back for an exchange... but before I do wanted to see what you guys think.

So I have a 3930k. it refuses to stop throttling if I overclock it past 4.6. Oddly enough I do have 1 core that can be anywhere between 10-15 degrees higher than the rest. I have reTIMed my waterblock and cpu atleast 8 times in the past 4 days... so it is not the TIM. Anyways I am running my CPU and GPU on a water loop with 2 360 rads.

So at 4.6 at 1.36v its fine... perfectly stable and will run prime all day long to its hearts content. that one retarded core hitting low-mid 70's, while the rest play fine and dandy at low 60-65. well with so much headroom, i figure ill bump it up and see where I can go. at any point if I increase the voltage it will continue to throttle back to stock clocks. I have all the c1 blah blah protect this protect that all turned off in my Bios, and my last attempt was 1.415 at 4.8. this was the "sorta" stable clock since itll boot fine below but crash immediately in prime95 under this. Anyways itll run prime at this voltage, but then it starts the same dance. 3200-4800 going up and down, up and down. temps on that 1 lowsy core topping out at 78.

is there something else i might be missing? let me list the rest of the basic setup of my comp below.

asrock extreme4-m
samsung low voltage 4x4gb ram
2 480 gtx SLI
seasonic 1250 psu
crucial m4 256 ssd
water loop with two 360 rads, raystorm cpu mount(just bought and installed this today to replace my Rasa)
oh yah... and an antec spotcool to blow on my VRM heatsink since i hear on this mobo they get a bit toasty.

I think thats the main stuff.

Anyways thanks for any information~!
mATX Overload
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post #2 of 13
Maybe it is too much for the motherboard (6+2 phases)? You are running a 130 W CPU overclocked.
Misaka
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post #3 of 13
Thread Starter 
Quote:
Originally Posted by trumpet-205 View Post

Maybe it is too much for the motherboard (6+2 phases)? You are running a 130 W CPU overclocked.

There are plenty of reviews of this board running the 3930k chip, all of them generally topped out at 4.6 but that generally due to temperature reasons, and running higher voltages than me.
mATX Overload
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mATX Overload
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post #4 of 13
check your C-states, Enable them all and see what happens. Also your vcore needs to be on offset +/-

note, I had my mb hang up and had to pull the batt because it wouldn't kick up. It hung at x12
Edited by Gaffords - 4/18/12 at 11:24pm
post #5 of 13
Thread Starter 
found out whats happening. actually had a Asus ROG admin explain to me the information. can close thread!!
mATX Overload
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post #6 of 13
You could let us know what you learned for the rest of us just incase another user runs into this...
     
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post #7 of 13
Thread Starter 
ah yes sorry. It has to do with the power usage of the 3930k chip at higher overclocks. due to the huge power draw the VRM temperatures skyrocket. due to the fact that even the high end mATX x79 boards only have 6+2 VRMs wiht a small(ish) heat sink attached to it, there is just not enough heat dissipation to be able to cool the VRMs to stay stable.

It seems on air cooling on mATX x79 is around 4.4-4.5 depending on how well your your case airflow is. After this, basically I get exactly the situation that I ahve described. There are 2 hardware level VRM protections that cannot be turned off. Level 1 causes the CPU to throttle back down to stock timing to reduce the power draw to cool off the VRMs, and level 2 resets your computer. Basically I have been hitting the level 1 VRM protect.

to attempt to overclock above this without throttling, VRM water blocks become neccesary to keep them cool so that I will not have this throttling effect.

please let me know if anyone needs any additional information. My VRM waterblock has been ordered as of this morning. haha.
mATX Overload
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mATX Overload
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post #8 of 13
So trumpet-205 was right?
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post #9 of 13
Thread Starter 
Quote:
Originally Posted by importflip View Post

So trumpet-205 was right?

half and half? definitely it is too much for the motherboard stock. should be fine once I get my water block. hard to just accept an answer of motherboard cant handle it, or VRMs arent enough when the computer is booting up perfectly fine. I just needed to find out exactly what the throttling reason was.

so basically for anyone in the future that has CPU throttling issues, if your CPU clock is going up and down with all the BIOS protections turned off, and the voltage isnt going up or down, just the CPU clock then your VRMs are overheating and a hardware level protection is taking over to reduce the heat.
mATX Overload
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mATX Overload
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post #10 of 13
Before you go all watercooled and whatnot, why not pick up a nice Antec Spotcool and point it at the VRM's. As long as your case is breathing, the Spotcool can do some magic as far as MB temps go.

My NB on my X48 is seriously taxed to the max (everything that can be plugged in going through it, is except 1 1X slot and 1 PCI slot. All 6 SATA slots, All Ram Slots, everything) and can hit over 85C+ without the spotcool (Which will cause it to drop a X16 slot, hdd, etc when things get loaded/hot). Just reinstalling my spotcool and pointing it at the NB = 50C+ Max temps.

I know the VRM's may run a little hotter, but you might be amazed buy what some direct airflow might do to such a setup. The only reason I go without a Spotcool sometimes is due to the fact that the damn things like to melt the motors on me lol. Might have something to do with the old placement of the fan between my soundcard and the NB. Now it is above the NB without the giant TRUE in the way.
     
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Hard DriveOptical DriveOSMonitor
128G SSD /2 2TB Seagates R1 /4 2+2 750G Seagate R1 LG GGW-H20L Blu-ray/HD DVD Windows 7 Ultimate 64 27 "Asus VG278H + 21" Gateway FPD2185W 
KeyboardPowerCaseMouse
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