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Sandy Bridge overclock progression

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a b à CPUs
a b K Overclocking
May 25, 2011 4:21:47 AM

I decided why not just see if Sandy Bridge has progressed in overclocking ability since its release. Would everyone with an overclocked Sandy Bridge K model please post here with the following info?

1)Date purchased(roughly)
2)The Ghz
3)2500K or 2600K
4)If 2600K-Hyperthreading enabled or disabled
5)Vcore
6)Heatsink
7)Mobo

I just like these types of threads to see what's the best combo for an overclock or if the chips have gotten slightly better over time.
a c 127 à CPUs
May 25, 2011 4:50:51 AM

I don't have a 2500/2600K but from what I remember, a bit ago people were modding the BIOS to unlock PLL voltage settings plus higher multipliers. Some people, on high end air cooling, were hitting 5GHz+.
a b à CPUs
a b K Overclocking
May 25, 2011 5:28:42 AM

1. Jan 12
2. 4.6 ghz. Will not boot into Windows over 4.8
3. 2600K
4. Enabled
5. 4.6 @ 1.32v
6. Noctua NH-U12P SE2
7. ASRock P67 Extreme 4

Will freeze while booting Windows 7 @ 4.9 ghz, but I have never tried to bypass that with PLL overvoltage or anything
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May 25, 2011 2:10:14 PM

Haserath said:
I decided why not just see if Sandy Bridge has progressed in overclocking ability since its release. Would everyone with an overclocked Sandy Bridge K model please post here with the following info?

1)Date purchased(roughly)
2)The Ghz
3)2500K or 2600K
4)If 2600K-Hyperthreading enabled or disabled
5)Vcore
6)Heatsink
7)Mobo

I just like these types of threads to see what's the best combo for an overclock or if the chips have gotten slightly better over time.


20/05/2011
4.8ghz
2500k
1.40v stable with lc enabled
kuhler 620
asus p8p67-m pro
May 25, 2011 2:33:44 PM

cool thread, I wish I had a rig to post some specs from but damn it makes me want to upgrade to a 2500k!
May 25, 2011 2:55:05 PM

jjb8675309 said:
cool thread, I wish I had a rig to post some specs from but damn it makes me want to upgrade to a 2500k!


You have a good system already.

but go out n get 2500k beasty
May 25, 2011 3:15:18 PM

1. Early April
2. 4.5 GHz
3. 2500K
4. N/A
5. 1.33v
6. Noctua C-12P
7. ASUS Sabertooth P67
a b à CPUs
a b K Overclocking
May 25, 2011 3:39:40 PM

1. January 25th
2. 4.8GHz
3. 2500K
4. N/A
5. I know for sure it's stable at 1.504v, but I'm currently trying it at 1.496v.
6. EK-KIT H3O Supreme HF 360 water cooling loop
7. ASRock P67 Pro3 B3

Other info that can make a big difference:
CPU Batch: L047B217 (C-batch tends to overclock better at lower voltages)
CPU Made in: Malaysia (Costa Rica tends to produce better overclockers)
a b à CPUs
a b K Overclocking
May 25, 2011 5:10:19 PM

jimmysmitty said:
I don't have a 2500/2600K but from what I remember, a bit ago people were modding the BIOS to unlock PLL voltage settings plus higher multipliers. Some people, on high end air cooling, were hitting 5GHz+.

Ah that's true, I do remember that. I just wish I knew more about what PLL did to allow a higher overclock; I sort of understand it, but there's only so much wiki could do. Something about being resistant to noise and whatnot is what I have picked up from that.
Quote:
1. January 25th
2. 4.8GHz
3. 2500K
4. N/A
5. I know for sure it's stable at 1.504v, but I'm currently trying it at 1.496v.
6. EK-KIT H3O Supreme HF 360 water cooling loop
7. ASRock P67 Pro3 B3

Other info that can make a big difference:
CPU Batch: L047B217 (C-batch tends to overclock better at lower voltages)
CPU Made in: Malaysia (Costa Rica tends to produce better overclockers)

True, but don't batch serial numbers mostly relate to what time they made the cpu?

And dayum, that voltage seems insane to run any Sandy at. :o 
a b à CPUs
a b K Overclocking
May 25, 2011 5:38:37 PM

As far as I know, PLL Overvoltage simply allows the CPU to apply extra voltage to the PLL circuitry within the CPU itself. The PLL circuitry is what turns the BCLK into the final CPU speed -- you might call it the "multiplier controller/generator."

I could be wrong, but that's what I gleaned from the interwebs...

Haserath said:
And dayum, that voltage seems insane to run any Sandy at. :o 

Yeah, I don't recommend that voltage to anyone unless they are willing and able to purchase a new CPU when the current one is damaged/destroyed by excess voltage.
a b à CPUs
May 25, 2011 8:10:40 PM

1)Date purchased: Early Marchish
2)The Ghz: 3.9
3)2500K or 2600K: 2500k
4)If 2600K-Hyperthreading enabled or disabled: enabled
5)Vcore: 1.19V [As you can see, I have plenty of headroom left to OC]
6)Heatsink: Themaltake V6
7)Mobo: ASUS P8P67 Deluxe
a b à CPUs
a b K Overclocking
May 26, 2011 2:42:31 AM

Haserath said:
True, but don't batch serial numbers mostly relate to what time they made the cpu?

Sorry, forgot about this part of your post...

I believe that the batch number refers to the physical location on the wafer where that particular CPU die came from. Some portions of the wafer tend to get better layering and such, so they produce better-quality CPUs. That results in higher overclocking potential.
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