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GA-Z77M-D3h + 3770K won't overclock past 4.1Ghz anymore

post #1 of 17
Thread Starter 
Hi Guys. I have a 3770K with a 212 Evo, in a Gigabyte GA-Z77M-D3H, rev 1.0 (bios F13 version - the latest version), in a Win 7 64bits SP1. I also have 32Gb of RAM G.Skill Ripjaws-Z 10-10-10-30 1600Mhz (XMP profile, 1.5V stock), a 128Gb Samsung 830 SSD, 4 Aerocool case fans, and PSU is a Seasonic 620W S12II 80+.

Default specs were multiplier x35 and turbo boost x39. The CPU stayed always in 3.9Ghz. So I decided to rise the multiplier. My motherboard does not have any CPU voltage change option, so I have to stick with auto.

First I raised the turbo multiplier to 4.2Ghz (all made in bios). No problems, intelburntest ok, max temp 68C. Then I raised to 4.5Ghz and was running ok also when a black screen appeared and the system crashed. Now it wouldn't boot anymore (no beepsound, only black screen) and I had to short the CMOS jumper to go back to default options.

So, I turned off turbo bosting and tried with multiplier x42 but it wouldn't boot also (it keeps rebooting automatically, beeping each time). So I lowered again to x39 and it worked normally. Rised again to x42, same problem, doesn't boot. Lowered to 4,1Ghz and it worked ok also.

I ran Prime95 for several hours and it's perfectly ok, with mas temps around 70°C. I tried to take out the battery for 30min, put it back again, but the problem persists: I can't go beyong the 4.1Ghz limit anymore.

I would still like to reach 4.2Ghz or even try again a higher multiplier, but it looks like my MB aquired some kind of memory and it won't allow me go past 4.1Ghz anymore. Does anyone knows what is happening with my configuration and how can I reach higher multipliers again?

Thanks a lot.
post #2 of 17
Did you ever check voltage applied on vcore? If it was anything higher than 1.4v, your CPU might have degraded.
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post #3 of 17
Thread Starter 
Hi, I have checked it with CPU-Z sometimes but may have missed in some measurements the beggining.
The temperature on the other hand have never been past 70-75°C in any core.

Today it stays oscillating between 1.14V but lowers to 0.8 during a few seconds then come back.

How can I check if my CPU have degraded?
post #4 of 17
Quote:
How can I check if my CPU have degraded?

The only way to know is by comparing voltage that you needed before to get certain frequency, and the new voltage that you need now. Other than that no way to know.
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post #5 of 17
Thread Starter 
Ok thanks. So the problem might be the CPU and if it is true then i can't go beyond 4.1Ghz anymore? Does the CPU loses processing power in any way comparing another with the same frequency?
post #6 of 17
Thread Starter 
But, can the CPU have really degraded for such a short period of time running at 4.5Ghz? (less than 15 minutes).
post #7 of 17
Quote:
Originally Posted by rafaeld View Post

But, can the CPU have really degraded for such a short period of time running at 4.5Ghz? (less than 15 minutes).

So it's been 15 minutes? No way ... Did you try to let your PC to cool down? Maybe mosfets are overheating.
Quote:
Originally Posted by rafaeld View Post

Does the CPU loses processing power in any way comparing another with the same frequency?
Nope, just needs more voltage.
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post #8 of 17
Thread Starter 
Uh, I feel better now, thanks. Yes, it was just a short period of time.

Yes, I did let it cool down turned off for 30min, in addition to that Coretemp always showed 30°C when idle, and even then I coudn't boot again with x42. Don't know why I could set it before but not now anymore. =/
post #9 of 17
Thread Starter 
Here's a printscreen of CPU-Z and Coretemp at full load:

24y20lw.jpg
post #10 of 17
Well the voltage is within normal range but somewhat lower then usual i think. Supposedly to have around 1.23V @ 4.1GHz but each chip is different so i'm not sure. Other then i would improve the RAM freq and latency as well.
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