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New Bios.. help with OC.

C

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Supreme [H]ardness
Joined
Nov 17, 2000
Messages
6,004
I can't get 5ghz stable with these settings but 4.8ghz is totally fine. I am at 1.41V on the CPU and just dropped it to 1.392V to see how low I can get the voltage while staying stable. Please look at my settings and let me know if there is anything I can adjust to bring down the heat and stay stable at 4.8ghz. I have read some say having the LLC to Ultra High is not good!


SETTING VALUE
AI Overclock Tuner X.M.P
X.M.P DDR3-1866 9-10-9-27-2N-1.5 Profile #1
BLCK/PEG Frequency 100
Turbo Ratio By All Cores (Can Adjust in OS)
By All Cores (Can Adjsut in OS) 48
Internal Pll Overvoltage Enabled
Memory Frequency 1866mhz
EPU Power Saving Mode Disabled

CPU Power Management
CPU Ratio Auto
Enhanced Intel SpeedStep Technology Enabled
Turbo Mode Enabled
Turbo Mode Parameters All Auto


DIGI+VRM
Load Line Calibration Ultra High
VRM Frequency Manual
VRM Fixed Frequency Mode 350
Phase Control Extreme
Duty Control Extreme
CPU Current Capability 100%
CPU Voltage Offset Mode
Offset Mode Sign Plus Sign
CPU Offset Voltage 0.065 (now stable @ 0.050 with 1850 bios)
DRAM Voltage 1.5
VCCSA Voltage Auto
VCCIO Voltage Auto
CPU PLL Voltage Auto
PCH Voltage Auto
CPU Spread Spectrum Auto


CPU Configuration
CPU Ratio Auto
Intel Adaptive Thermal Monitor Enabled
Hyper-Threading Enabled
Active Processor Cores All
Limit CPUID Maximum Disabled
Execute Disable Bit Enabled
Intel Virtualization Technology Disabled
Enhanced Intel Speedstep Technology Enabled
Turbo Mode Enabled
CPU C1E Enabled
CPU C3 Report Auto
CPU C6 Auto
 
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I'm getting a little tired of the "Oh, I have a Sandy Bridge and it must be 5+ ghz capable" mindset.

CPU overclocking, especially with Intel, is extremely YMMV. Some chips may make it to 5+ ghz on air, but most will not make it without a full watercooling setup. With AMD you can expect similar overclocking between the same model chips, but Intel chips, especially Sandy Bridge, are highly variable from one chip to the next. The only thing that is consistent with them is being able to overclock to the 4.2-4.5 ghz range fairly smoothly and easily. Above that, it's a crapshoot. Of course, different motherboards can also affect how well your chip overclocks.

Okay, rant done, now to the useful part.

Increase your CPU PLL voltage and see if that helps bring down CPU core voltage.
Disable Turbo Mode. Disable Speedstep Technology (you can re-enable this after you get things stable).

LLC increases the voltage to your CPU as the load increases to keep your voltage stable. You may see voltages in Windows that are higher than what you specified in the bios. You can set the LLC lower, but the net result would be having to increase vcore in order to keep it stable.

Other than that, it is trial and error. You just have to experiment to see what works for you.
 
Yeah the 5ghz is a nice number but I think ill leave that alone. I want this rig to last me a while and 4.8ghz has been stable for many months. Tried LLC on High and that was a joke. Ultra High for sure. I got the voltage down to 1.384 and plan on stressing it until she breaks or I give up and call it stable... then drop her down some more.
 
When bringing down voltage, I usually just do 5 runs, maximum memory size on LinX for a quick check on stability. This usually takes about 15-30 mintues. Once it returns errors, I bring the voltage back up one notch and do a more extensive test, usually about 20-25 runs. If that is stable, go on to the P95 tests. If it is also stable, then you can leave it right there.

Note: by getting it so low, once you go into summer and your house starts heating up, you might lose your stability, lol.
 
I am in Texas.. its freakin HOT right now so I thik im covered for the heat. Passed everything I could throw at it including 8 hours of OCCT @ 1.4V which is +.050 instead of +.065 I was running. I tried +.025 and the machine rebooted during the stress test.
 
Guess I will settle for the little voltage drop I got from the Bios update. All my boot up problems are gone with the bios. Only thing that sux is them changing how the CPU temps read... stupid.
 
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