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BBEG's entry into OCing - some successes, some failures, critiques always welcome

post #1 of 9
Thread Starter 
Sig rig is finally being tested. I'm an hour into Prime95 working on my 2600k at 4.8GHz, 1.384Vcore. This is my first real OC attempt aside from some brief toying with the Z77 BIOS's CPU Level Up feature earlier yesterday. So far Prime is reporting no errors, so I'm going to leave it on overnight and see where it stands in the morning.

I've got to give major credit where it's due to Thermalright: the TRUE Spirit 120m is a phenomenal air cooler for its size, price, and fan speeds. I'm hovering in the 80s, so far never hitting 90°C. I'd have expected my machine to throw in the towel by now but this skinny little single-tower air cooler is still churning away and Prime's still going strong. Awesome $35 temporary solution until my watercooling stuff comes.

So now I've got questions.

1) Is 4.8GHz at 1.384Vcore good, bad, or right in line with the 2600k OC experience?

2) With Speedstep left on, should I expect these kind of CPU temps with this cooler whenever the CPU ramps up while gaming or screwing around in Sketchup / CAD?

3) ...Is there somewhere in the BIOS I should've saved these settings? I'd hate to see them vanish when I reboot or if stability fails overnight.


Project Caedo is off to a fine start, I think. kungfu.gif
    
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post #2 of 9
I'd say that's a pretty decent overclock, my 2600K takes 1.435v stable. Temps using GTX360, 6x AP-15 Push/Pull, EK Supremacy CPU block, high 60s in Prime, mid 70s Intel Burn Test. I'd save your current OC profile in the Asus BIOS now then go back to stress testing. Think you can store up to 10x on the Maxi V, I can on my Maxi IV.

EDIT: If you want a quick result stress test, run Prime 95 with a custom test of FFT 1334 and 1792 before you dedicate much time to a 12/24 hr Prime run. Details here: [Info] - Intel 2500k/2600k Overclocking Tips


Edited by Krayge - 6/18/13 at 1:15am
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post #3 of 9
Thread Starter 
Good info, thanks.

So that profile got utterly schooled by Prime using Blend + 90% RAM. Made it, oh, 15 min before BSOD. However, on straight FFT's it did fine and I killed it a little before the 12hr mark. Essentially it's round two for me; I'm going to redo the 4.8 profile and slowly creep up to see what's stable doing this custom blend. If that fails then I'll have to start from scratch.

It's amazing that I'm only sucking up 130W tops according to Core Temp. I figured I'd be using a lot more power than that. Sandy's good people. thumb.gif
    
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post #4 of 9
Thread Starter 
Starting over, gotta work within the limitations of the cooler apparently. tongue.gif

Right now I'm trying for stable 4.6 with vcore set to manual 1.34V. However, under load I'm seeing different voltage readings in Core Temp (1.386) versus in CPU-Z (1.336). Any ideas on what's causing this?
    
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post #5 of 9
Quote:
Originally Posted by BBEG View Post

Starting over, gotta work within the limitations of the cooler apparently. tongue.gif

Right now I'm trying for stable 4.6 with vcore set to manual 1.34V. However, under load I'm seeing different voltage readings in Core Temp (1.386) versus in CPU-Z (1.336). Any ideas on what's causing this?
are you running both programs at the same time? doing that can give you a false read on the voltage i've heard..
post #6 of 9
Thread Starter 
Same time yes.

As holy crap does the custom blend + 90% ram usage put a beating on the True Spirit 120m. an hour in and max temps are 87 on two cores and 83 on the other two. This is not the cooler to bench on. Think my Noctua U12P SE2 will fare better or would it be just a side-grade? I'm pretty sure a better fan would help...
    
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post #7 of 9
Use the nh-u12p and buy some nf-f12's to replace the nf-p12 that comes with the cooler.
post #8 of 9
Thread Starter 
Guess who gets to make an official entry into the Super Stable club? thumb.gif



Gonna give it the last 2 and a quarter hours needed to call it 24hr super stable. I'm ordering a pair of Noiseblocker Multiframe M12-PS (the 600-1500RPM PWM fan) and will retest with that to see temp differences, then move to the U12P SE2 using the same fans.
    
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post #9 of 9
Thread Starter 
Newest attempt: 4.5 GHz at 1.28V, LLC set to Ultra, and a couple other little settings I forgot that I'll report back if stability passes.



Went back to the Noctua U12P SE2 w/ 2x AP-14s in push-pull. Temps are hovering in the low-mid 60s, then 68-72 in tough tests. Idle were low 30s, which is normal given the generally-warmer ambient temps in my room.

I felt that a 4.6 GHz overclock at 1.34V was a bit too high, so I'm trying to find a good 24/7 general purpose overclock that won't bottleneck my GPUs. So far stability looks fine for 4.5 at 1.28V. I'm hoping with these settings I can creep up to x46 or x47 without much of a bump in voltage. Otherwise I found the practical limit of my CPU on air.
    
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MonitorKeyboardPowerCase
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