Overclocking my 2500k on a p8z68-v pro/gen3 + H100i in 500R

[Opirr]

Hey all,

I am curious about the overclocking world. I used the "auto-tune" that comes with the AI suite, and had the CPU set to 4.5. I ran it again and now it's sitting at 4.4 stable. I'm not sure why or exactly what happened.

I wanted to tweak it up to 4.7-4.8 since I read so much that the H100i will dissipate the heat fast enough to make it stable.

Mobo: p8z68-v pro/gen3
Cooler: H100i
Case: 500R
Memory: 2x 4GB Kingston 1600 Mhz (but says max bandwidth 667? That doesn't seem right)
CPU idle temp (H100i cooler on balanced): 29-30 C
CPU idle temp (H100i cooler on performance): ~22 C
CPU Voltage: 1.295

Again, the only thing I've run is the "auto-tune" feature, which I feel like it plays on the safer side of tuning. The H100i is running a whole 10-15 degrees cooler than my 212 EVO did, but even my EVO was hitting 4.5. Thoughts?

 

[fkr]

Ai Tweaker
Ai Overclock Tuner: Manual
BLCK/PCIE Frequency: 100.0
Turbo Ratio: By All Cores
By All Cores: 48
Internal PLL Voltage: Disabled
Memory Frequency: use the rated speed for your memory
DRAM Timing Control: use the rated timings for your memory
EPU Power Saving MODE: Disabled


Ai Tweaker\ CPU Power Management >
CPU Ratio: Auto
Enhanced Intel SpeedStep Technology: Enabled
Turbo Mode: Enabled
Long Duration Power Limit: Auto
Long Duration Maintained: Auto
Short Duration Power Limit: Auto
Additional Turbo Voltage: Auto
Primary Plane Current Limit: Auto


Ai Tweaker (in the DIGI+ VRM section)
Load-Line Calibration: Ultra High
VRM Frequency: Manual
VRM Fixed Frequency Mode: 350
Phase Control: Extreme
Duty Control: Extreme
CPU Current Capability: 140%
CPU Voltage: Offset Mode
Offset Mode Sign: +
CPU Offset Voltage: 0.040V
DRAM Voltage: use the rated voltage for your memory
VCCSA Voltage: Auto
VCCIO Voltage: Auto
CPU PLL Voltage: Auto
PCH Voltage: Auto
CPU Spread Spectrum: Enabled


Advanced\ CPU Configuration >
CPU Ratio: Auto
Intel Adaptive Thermal Monitor: 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: Disabled
CPU C6 Report: Disabled


and just read through this material for more info

http://www.overclock.net/t/1012874/the-official-asus-p8p67-p8z68-p8z68-gen3-series-owners-club#

 

[jimmysmitty]

^this is a good guide but remember every CPU is different in how they will handle a OC. You might need to tweak the voltage and offset to get stability at certain speeds.

As for the AI OC Tune, more than likely the CPU is not able to attain it with those settings anymore. Over time when OCed a CPU can degrade, although it is not normal to see it that soon. The best bet is to read that guide and tweak it manually as you will get better OCs at lower voltages than AI OC Tune will do (it tends to up the voltage for better stability yet more heat output).

 

[fkr]

I have the exact same motherboard and CPU so feel free o ask if ou need help. I have reached 5.1 with this setup (no officially as I eventually overheat if I stress test tho).

I run either 4.6-4.8 just depending on my mood. 4.6 is about when I really need to start upping the voltage. 1.5+v to hit 5.0GHz

 

[nikoli707]

i still wouldn't go much farther than 1.35v with an h100i

 

[fkr]

i am using a hyper 212+ so i am sure you are fine. are you overheating at 1.35v.

 

[Undying89]

My 2500K 5Ghz - 1.440v, best chip i had.

 

[nikoli707]

My 2500K 5Ghz - 1.440v, best chip i had.

i have a picture of 5.1ghz that i booted into windows with and took a cpuz shot with 😛

1.44v is far too high voltage for 24/7 even if you have a nice 240rad d5 pump setup, unless you doing a quick bench.

1.35v, maybe 1.375v of you have a great chip, should be the aim on a noctua/phanteks/h100i. your voltage needs will skyrocket, temps will raise very quickly, and all you get is 0.2-0.4ghz more if you go to 1.40v. also you better have a platinum power supply with high end regulation and a top of the line motherboard if you want to be anywhere near safe at 1.40v even if temps are in check. what only an oscope will reveal is 1/1000th of a second voltage spikes that still hit 1.50v on cheap hardware. quick benchmarks are one thing, but any type of gaming or apps are not going to perform that much better to make the temps and chance of electromigration worth the extra couple 0.1ghz.

 

[Undying89]

Sandy can easily go up to 1.45v if your motherboard can take it. Temps are in check and compared to Ivy and haswell, Sandy stay alot cooler.
CPU isnt used for 24/7. Power saving features are on (c3/c6 off) and CPU idles back to 1600mhz when its not used. Gaming sessions with 3-4 hours are day wont hurt chip on those voltages.

This 2500k is overclocked 2-3 years and i dint even notice any degradation, still stable.

 

[jimmysmitty]

My 2500K 5Ghz - 1.440v, best chip i had.

i have a picture of 5.1ghz that i booted into windows with and took a cpuz shot with 😛

1.44v is far too high voltage for 24/7 even if you have a nice 240rad d5 pump setup, unless you doing a quick bench.

1.35v, maybe 1.375v of you have a great chip, should be the aim on a noctua/phanteks/h100i. your voltage needs will skyrocket, temps will raise very quickly, and all you get is 0.2-0.4ghz more if you go to 1.40v. also you better have a platinum power supply with high end regulation and a top of the line motherboard if you want to be anywhere near safe at 1.40v even if temps are in check. what only an oscope will reveal is 1/1000th of a second voltage spikes that still hit 1.50v on cheap hardware. quick benchmarks are one thing, but any type of gaming or apps are not going to perform that much better to make the temps and chance of electromigration worth the extra couple 0.1ghz.

The board he has is actually a very nice board and has been used to consistently push 4.8-5GHz (the OP) as I had that board and was able to hit 4.5GHz on stock voltage.

That said, I agree that 1.40+ is a risk and while degradation may not show right away there is all kinds of issues that could arise that may not present itself. I have seen systems that seem normal for years then all kinds of corruption and issues pop up.