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Need help OC 3770k @ 4.5 Ghz on Air Heatsink

post #1 of 21
Thread Starter 
Pretty much a beginner when it comes to overclocking. Today I just installed my new Zalman CNSP9900 heatsink today and was prepared to start overclocking my i7 3770k on my p8z77-v ASUS mobo. I am shooting for 4.5 Ghz but I am having some issues with Prime95 /BSOD's. Currently I get BSOD within a few seconds of running Prime95 or it prime95 just crashes on me. I have the multiplier at 45 and CPU voltage at 1.310... should I keep bumping up the voltage? I feel like this is somewhat high for 4.5ghz

Any feedback is welcomed, thanks.
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Blue Beauty
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post #2 of 21
A lot of chips take 1.35V for 4.5, so you should try bumping the voltage. Also check your Vdroop - just because you set 1.31V in the BIOS doesn't mean it is getting that under load - make sure you check the voltage with CPU-Z under load. What do you have Loadline Calibration set to?
post #3 of 21
You have a crappy chip. I've gone through 5 3770k's now and one of them took 1.35V to get 4.5 Ghz to even boot. Under load it would still crash. Most are 1.3 or less and 4.5 ghz is stable. It happens.
Edited by dr/owned - 3/30/13 at 5:06pm
post #4 of 21
Usually the BSOD's will give you an idea of what needs to be changed to prevent another one. Here is a BSOD list so you can try to match up the code that you have with this so you know what you have to change.

0x101 = increase vcore
0x124 = increase/decrease vcore or QPI/VTT... have to test to see which one it is
0x0A = unstable RAM/IMC, increase QPI first, if that doesn't work increase vcore
0x1E = increase vcore
0x3B = increase vcore
0x3D = increase vcore
0xD1 = QPI/VTT, increase/decrease as necessary, can also be unstable Ram, raise Ram voltage
0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances
0x50 = RAM timings/Frequency or uncore multi unstable, increase RAM voltage or adjust QPI/VTT, or lower uncore if you're higher than 2x
0x109 = Not enough or too Much memory voltage
0x116 = Low IOH (NB) voltage, GPU issue (most common when running multi-GPU/overclocking GPU)
0x7E = Corrupted OS file, possibly from overclocking. Run sfc /scannow and chkdsk /r
post #5 of 21
Thread Starter 
I bumped up the voltage to 1.35 and now I haven't BSOD yet ... but Prime95 keeps crashing maybe 10-20 seconds in. Also in my ASUS board for Loadline Calibration it has preset profiles like Auto, Regular, Medium, Extreme etc... where Auto is auto and Regular is 0% an extreme is 100%. It was on auto previously so now i have that set to Regular (so it should be at 0% which also should be disabled).

I mean so far i bumped the voltage up but i can't even run a proper stress test... and yes its about 1.35v in CPU-Z on idle
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Blue Beauty
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post #6 of 21
Set LLC to High or Very High for 4.5. What's the actual load voltage right now? With Regular LLC you might be drooping to 1.3V or something.

When the CPU is loaded the current draw causes the voltage to drop a little (called Vdroop). LLC is designed to counter this by increasing voltage when the CPU is heavily loaded. With LLC off, as is sounds like you have it, the voltage will sometimes drop significantly when you put a load on, and that's why you are getting crashes. So 1.35V might be enough, but it needs to be 1.35V at load, not at idle.
post #7 of 21
Thread Starter 
Okay I will try a higher LLC setting - Just as a note I realize that running prime95 it either crashes or I BSOD within 20-30 seconds. Before i BSODS though i see that the load in Realtemp drops to 87%. Apparently one of the threads in prime95 stops running... any reason why it doesn't stay at a load of 100%?? I can tell if i am going to BSOD soon also because i get a bunch of .exe's running in the background that crashes before my BSOD
Blue Beauty
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Blue Beauty
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post #8 of 21
Thread Starter 
Okay so I ran Prime95 for about 15 minutes without crashing / BSOD!! Success.... but my temps are way too high. CPU-Z says my voltage is 1.360 when its on 100% load and my temps hit a max of 93-99C on all 4 cores. I have LLC at 75% in bios... Also I forgot to note earlier that my CPU Current Capability is at 120% (default is 100% - I saw someone else who had same mobo as me bump this up).

Since I am getting such high temps and 1.360v at load i think im suppose to lower the voltage now? What is my next step?
Blue Beauty
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Blue Beauty
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post #9 of 21
My 3570k takes 1.32v for 4.5ghz stable 24/7, your temps are very high lower the voltage slowly and each time do a stres test until you reach a point where it wont be stable. Then increase the voltage until its stable. Then you can find your lowest stable voltage. If your temps are above 88 degrees celsius after all that then I suggest you either do a smaller overclock (maybe 4.2ghz) and get a better air cooler. My hyper 212 evo keeps the cores at 75-85 degrees celsius in a stress test.
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post #10 of 21
Quote:
Originally Posted by iSleepdrive View Post

Okay so I ran Prime95 for about 15 minutes without crashing / BSOD!! Success.... but my temps are way too high. CPU-Z says my voltage is 1.360 when its on 100% load and my temps hit a max of 93-99C on all 4 cores. I have LLC at 75% in bios... Also I forgot to note earlier that my CPU Current Capability is at 120% (default is 100% - I saw someone else who had same mobo as me bump this up).

Since I am getting such high temps and 1.360v at load i think im suppose to lower the voltage now? What is my next step?

Yeah, drop the voltage a notch and then retest for stability. Keep doing that until you find the lowest stable voltage.

Also check the CPU fan speed, maybe you can turn it up a little.
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