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Issues with overclocking i7-3820

Tags:
  • Overclocking
  • Intel i7
  • CPUs
Last response: in Overclocking
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September 24, 2014 7:15:57 PM

So I've been running this CPU overclocked to 4.5 GHz for awhile stably, but ever since I put in a new power supply, I've wanted to try pushing it to 4.6 or 4.7 GHz since I had enough headroom in the power supply to finally try doing so. Unfortunately, when trying 4.7 GHz, the computer just outright crashed over and over again until it could finally get to the POST screen where I could change the frequency again, to which I tried 4.6 GHz instead and the system, instead of crashing over and over until it finally let me to POST, just stayed stagnant. Screen didn't turn on or anything, but everything in the case was running, which is weird because if it was going to act up I'd have expected it to simply crash like with the 4.7 GHz overclock.

Ultimately, I know it's not the power supply limiting it at this point, the temperatures are fine on the CPU, and this CPU in general has been shown to be capable of overclocking past 4.5 GHz by others.

My guess is possibly the RAM could be causing an issue with the CPU overclock and causing the system to crash as it isn't exactly quality RAM, and to get this CPU even to reach 4.5 GHz I have to mess with the BCLK frequency which causes the RAM to overclock also, to which I've tried underclocking the RAM too but the system still crashes.

Anyone have ideas on what may be happening?

System Specs:

Gigabyte GA-X79-UD3 v1.0 (F20) MB
i7-3820 @ 4.5 GHz (3.6 GHz base)
EVGA GTX 760 Superclocked ACX Cooler
V-Color 16 GB(4x4) TD4G16C11-H11 1600 MHz RAM
EVGA Supernova 1300 G2 PSU
Corsair H60 Liquid Cooling for CPU

More about : issues overclocking 3820

a b K Overclocking
a b à CPUs
September 24, 2014 11:58:59 PM

Are you overclocking with multiplier and core voltage only or are you changing FSB values?
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September 25, 2014 10:49:51 AM

I max out the cpu multiplier to 43, which is basically the absolute max the clock ratio will go to for all i7-3820 for a 4.3 GHz overclock, and to achieve 4.5 GHz I've pushed the Host Clock Frequency/BCLK control up to 105.00 MHz, as well as changed the CPU voltages accordingly for it to remain stable up to that point. It only becomes unstable if I try to push it to 4.6 GHz or above, even when also adjusting the CPU voltages again.
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a b K Overclocking
a b à CPUs
September 25, 2014 4:58:01 PM

Lost the lottery huh? Well, actually, I mean, 4.5 is a damn good OC. Anytime you can get basically a full Ghz OC and be stable it's a pretty good gain.
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