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I5 2500k ASUS Sabertooth P67, need help with easy OC

Last response: in Overclocking
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April 28, 2011 8:19:46 PM

I am a total beginner to OCing and want to OC between 4.5ghz and 5ghz as easily as possible without any problems. I have done some OC research but still need a guiding hand.

i5 2500k
ASUS P67 Sabertooth
8gb DDR3 1600
Asetek 550LC Liquid Cooling w/ Dual Enermax fans (push pull)
EVGA GTX 560 Ti (Factory OCed to 900mhz)

Let me know if you need any further information.

Thank you in advance!
April 29, 2011 3:44:51 AM

Ok, thanks for the link!
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April 30, 2011 7:19:39 PM

Overclock a Core i5-2500K to 4.5GHz
1. Enter the BIOS by pressing Delete as the PC starts
2. Enter the Advanced menu by clicking the button in the top-right corner
3. Set the CPU multiplier to 45x
4. Enable Load-Line Calibration
5. Set the CPU voltage to 1.3-1.35V
6. Set the CPU PLL to 1.9V
7. Set the VCCSA to 1.1V
8. Set the VCCIO to 1.106V
9. Hit F10 to save and restart


100% stable.
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April 30, 2011 10:28:18 PM

Man talk about breakin it down nice and simple! Thanks bruh! These settings don't cause any additional wear and tear on the mobo or CPU right?
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April 30, 2011 10:32:47 PM

I was also looking at some OC website, those VCCSA and VCCIO voltages aren't too low?
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April 30, 2011 10:41:35 PM

What about any other settings, leave as is? Sorry for multiple posts...
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April 30, 2011 11:17:23 PM

Lol overclocking is always going to cause more wear and tear. its like putting a super charger on a dodge neon its not great for it but it goes fast.


Make the changes i posted and leave it alone.
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April 30, 2011 11:23:15 PM

Thats a cyberpower built isnt it.
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Best solution

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a b K Overclocking
April 30, 2011 11:27:50 PM

baybiz85 said:
I was also looking at some OC website, those VCCSA and VCCIO voltages aren't too low?

VCCSA should be 0.925v (CPU default). You don't need to raise that unless you are going to try BCLK overclocking.
VCCIO should be set at 1.05v (CPU default), as the increase isn't likely to affect the overclock at that low a speed.
CPU PLL at 1.9v may be required, but leave it at the default setting and see if it works first.

For me, none of those settings needed to be increased for me to get my 2500K to 4.8GHz.

BayBiz:
I would do steps 1-5, then skip straight to step 9. If that turns out to not be stable, then change the CPU PLL. The other voltages listed shouldn't need to be changed at all.
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May 1, 2011 2:53:08 AM

cia24 said:
Thats a cyberpower built isnt it.


No I don't shop at CyberPower
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May 1, 2011 2:57:26 AM

Leaps-from-Shadows said:
VCCSA should be 0.925v (CPU default). You don't need to raise that unless you are going to try BCLK overclocking.
VCCIO should be set at 1.05v (CPU default), as the increase isn't likely to affect the overclock at that low a speed.
CPU PLL at 1.9v may be required, but leave it at the default setting and see if it works first.

For me, none of those settings needed to be increased for me to get my 2500K to 4.8GHz.

BayBiz:
I would do steps 1-5, then skip straight to step 9. If that turns out to not be stable, then change the CPU PLL. The other voltages listed shouldn't need to be changed at all.


Thanks I think I've heard what I needed to hear now, I just want a stable 4.5 clock while having my components last a long time still.
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May 1, 2011 2:58:12 AM

Is it true that I have to manually set my RAM to 1600 even though thats what it is suppose to be at already?
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May 1, 2011 3:56:02 AM

Yeah, it will default to 1333. You'll have to set it to XMP or 1600.
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May 1, 2011 9:49:47 AM

Leaps-from-Shadows said:
Yeah, it will default to 1333. You'll have to set it to XMP or 1600.



LFS you the man! Thanks again bro!
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May 1, 2011 3:03:09 PM

Heh - Im running my CPU at 1.5v (with a nice big Scythe cooler) and 5Ghz!

All CPUs ar different, you could try and gage where your CPU's 'safe' limit is. A lot of people set their voltage limit for the 1.4 - 1.45 mark, i heard that an Intel tech had posted on a forum that 1.52 was the 'safe' limit for the 2500K. Y temps rarely go over 60 degrees at 5Ghz so Im happy ;) 
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May 2, 2011 4:07:01 AM

Asus offers great uefi software with that board, Why not use the auto ez clock in the bios. I used the setting for my P67 sabertooth/I7 2600k just to see what it would do and on auto it overclocked to 4.5ghz super stable. 34c (75f in room) on air 212 hyper +
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May 3, 2011 12:03:52 AM

I heard the auto clock can turn the voltages up higher than needed, what is yours at using the auto clock?
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May 3, 2011 11:31:59 PM

baybiz85 said:
I heard the auto clock can turn the voltages up higher than needed, what is yours at using the auto clock?



the middle stock setting is 1.165v which is running 3.8ghz

the higher one is 1.220v which is running about 4.6ghz

this is all done with the efi auto clocking, yes doing a manual over clock will get better results, but for someone that is new to overclocking this is some good stuff.
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May 4, 2011 12:26:11 AM

wow 1.22v at 4.6ghz is actually pretty good compared to other posts I've seen on multiple forums. You got that from the auto clock? I'm impressed.
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May 4, 2011 2:10:14 AM

baybiz85 said:
wow 1.22v at 4.6ghz is actually pretty good compared to other posts I've seen on multiple forums. You got that from the auto clock? I'm impressed.



yup from the highest auto clock in the ez bios, keep in mind this from the I72600k , but i believe the 2500k is similar
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May 4, 2011 2:25:59 AM

i7ftw said:
yup from the highest auto clock in the ez bios, keep in mind this from the I72600k , but i believe the 2500k is similar

Lucky overclocker. The average for 4.5GHz is 1.3-1.35v. Must be a C-batch CPU. My B-batch 2500K certainly won't do what yours can.
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May 5, 2011 8:08:35 AM

Man hope I get a C batch 2500k haha. I'll auto clock first and see what I get I guess. If I download CPU-z and a temp reading program would that be all I need to make sure everything looks good?
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May 5, 2011 9:28:18 AM

The batch number is listed on the box the CPU came in. It will start with L and have an A, B, or C somewhere in it.
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May 5, 2011 9:52:09 PM

i got mine 2 weeks ago from new egg and batch # is 3049A423
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May 5, 2011 10:19:40 PM

Really? Wow, you really are lucky. The C-batch CPUs are known to require less voltage for any particular speed. Maybe there are a few A-batches that do well also.
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May 5, 2011 10:53:09 PM

i think mine is coming next week
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May 8, 2011 8:39:07 AM

Best answer selected by Baybiz85.
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May 11, 2011 7:34:08 PM

so I got my computer now and at first I ran into some crazy problems with everything still at stock like freezing and bsods and restarts but I seemed to have smoothed everything out and now I have left everything at auto and pushed the multiplier up to 42 just to see if it would be ok and it seems good. Running prime blend test @ 4.2 and the max temp im seeing is 57c. Should I just take what I got or should I push more, Im scared because of how the system was when I first got it.
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May 11, 2011 8:21:51 PM

also auto is setting the voltages at around 1.28 to 1.29, isnt this a bit high for a 4.2ghz clock or is that fine? prime passed the first round of testing with no issues at all it seems but I had to turn it off because my windows are getting worked on in my house and its by my comp so I had to move it. how long should i run the prime to know its fully stable and does prime stress your gpu as well?
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May 12, 2011 12:09:11 AM

The average voltage for 4.5GHz is 1.3-1.35v so you're right in line with that.

If you're going to continue to increase the speed, just run Prime95 for an hour or so to test it out. Once you've achieved your goal speed (whatever that is), then as a final check I suggest 24 hours of the Blend setting.

I actually do this:
24 hours of Small FFTs.
24 hours of In-place large FFTs.
24 hours of custom Blend testing 11264MB (my system has 12GB).

Most people don't have the patience for that.
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May 12, 2011 3:03:52 AM

ok sounds good, ill see if I too have that kind of legendary patience. i think ill just play a game to test my gpu, something gpu intensive...any ideas?
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May 12, 2011 4:37:57 AM

FurMark 1.9.0 will likely be the hardest stress test you can do.
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May 12, 2011 11:19:07 PM

i heard furmark can be so hard that it could potentially ruin my card, how true is that?
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May 13, 2011 3:47:40 AM

As long as your card has an adequate power system and isn't overclocked/over-volted beyond its means, the risk is minimal. The 560 Ti reference power system is good enough.

If you don't want to try FurMark, you could always run the software from EVGA called OC Scanner. It has a stress tester and an artifact detector, so you can tell when an overclock really is stable or not.
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May 14, 2011 2:14:47 AM

Oh nice that sounsd perfect, just D/L that of the evga website? Or is it built into the gfx card software somewhere?
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May 14, 2011 5:05:10 AM

Thank you again LFS! Can somebody nominate this guy for president already!
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