The Sandy Bridge OC Thread

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stormblast said:
1.3-1.35vcore is a lot for 2600k?

isnt that fine for around 4.6ghz if temps are under control
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He is not saying that 1.3~1.35v is too much for these CPU., but that you should be able to get 4.6GHz with a much lower voltages. Heck you can pump 1.3V and run the CPU at stock clocks, but that is not an optimal voltage is it? So see if you can run the CPU stable with lower voltages. Ofcourse not all CPU's are born equal even if they are the same model, but if there is a chance that it can run at lower voltages or you can oc more on your current voltage, then why the heck not?

I am running 4.5GHz @ 1.2V on my i5 2500k, Gannu is running 4.5 @ 1.24V, same goes for others running i5 2500k's. I am beginning to think that i5 2500k owners on the forum are getting better luck overclocking their CPU's (In terms of voltages and thermals) than the ones who got i7 2600ks. :P
 
On a side note, this platform is so darn easy for overclocking. I think it took me about 10 minutes to get the things right (voltages more specifically) on the Saturday afternoon and began Cryshit 2 almost instantly. :lol:
 
^^ For the casual overclocker, there is nothing much they can even mess around on this platform. No BLCK overclocking to worry about RAM potential, Most of the voltages are not worth messing around with.

You just change the multi and the vcore and if it boots, you run prime 95. Even 10 min is an overkill. It took no more than 3 min to get my CPU to 4.5GHz with optimal voltage and most of that time was spent in booting/restarting.

btw, there was a video on youtube showing somebody's 90 year old grandma overclocking on the Sandy Bridge platform :P.
 
obviously i know lower volts is better. but the reason ive pumped 1.3-1.32v is because it wasnt stable at lower volts at 4.6ghz :p

need to make it linx stable for around 2-3hrs. at 1.3v i got an error after 1hr 25min in linx. so had to give it slightly more.

also you guys forget that yall are on 2500k and not 2600k :p (8 threads compared to 4 threads will definitly require more volts imo, if i disable ht im sure i can achieve somewhat similar clocks at same volts like the 2500k)
 
My Processor is 2500k, motherboard Gigabyte P67A-UD3R-B3 & RAM 2X2GB Corsair Vengeance CL9 kit. I pushed my processor to 4.5Ghz with a Hyper 212+ Push-pull Heatsink. I had to feed 1.255 volts to get that OC stable. Anything lower than than causes BSOD on prime95 small FFT. I am not overclocking the memory and running it @1600Mhz by enabling XMP in the BIOS.
But my question is about the LLC(Load-Line Calibration) option in the BIOS. What does this actually mean? I saw that there are three choices for that option.(Auto, Enable, Disable). If I keep it auto or disabled then my cpu isn't stable @4.5Ghz with the above amount of vcore. But Enabling it helps the stability greatly. But is it harmful to enable it? I just bought the System & will use it 3/4 years safely. I don't want to do something which causes degradation. Experienced OCers share your thoughts.
 
^ yes that is true.. leave the voltage to offset and reduce the offset voltage until stable.. manually setting the vcore voltage disables its capability to lower the voltage when clock speeds reduce.. and the voltage you are using for your setup is fine.. You wont be reducing lifetime of the proccy with those voltages.. Also leave LLC to Enabled..
 
But my load temps on Small FFT of prime95 are 64,68,68,67 on four cores. I would like to keep it under 65c. My ambient temp is around 30-31c
 
Buddy I got a hyper 212 plus myself and have just applied tuniq tx-4 TIM.. My idle temps are 34-36*C, room temps around the same and load temps 61-62*C with 1.176v vcore voltage.. So for 1.255v vcore those are good temps.. what Thermal Compound are you using?
 
yashchitale said:
Buddy I got a hyper 212 plus myself and have just applied tuniq tx-4 TIM.. My idle temps are 34-36*C, room temps around the same and load temps 61-62*C with 1.176v vcore voltage.. So for 1.255v vcore those are good temps.. what Thermal Compound are you using?
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I am using Arctic Silver Matrix.. What is the 100% safe load temp for these sandy bridge processors? I will keep the OC 24/7.
 
I just bought the i7-2600K 3.4ghz and been running it since past a week. As i want to overclock it so i performed the following procedure but it turns out to be a big mess for me and almost saved my CPU (i think so).

Procedure suggested by: Clunk.Org

Overclocking 4.00ghz

Ai Overclock Tuner - Manual
BCLK/PEG Frequency - 100

Turbo Ratio:
By All Cores (Can Adjust In OS) - 40

Memory Frequency - Set to AUTO or 1333MHz for now

DRAM Timings
CAS Latency - 9
RAS to CAS Delay - 9
RAS Pre Time - 9
RAS ACT Time - 24
DRAM Command Mode - 2T

Load-Line Calibration - Enabled High or Auto**
CPU Voltage - Manual Mode
CPU Manual Voltage - 1.120v
DRAM Voltage – Auto (Check your’s like 1.500V – Change it)
CPU PLL Voltage (Should be set to Disabled)

CPU Test
Run a Torture Test: Prime95
After i ran the torture test my CPU temps have raised till 72 degrees and then it got restarted suddenly. So i removed all the settings and now its running on default settings of 3.4ghz. Now i am wondering inspite the fact that i have an AC installed in my room which makes me room temp very low.

But one thing i have not yet done is to install a CPU cooler. I have a CM 690 II Advance cabinet with 3 additional fans installed. So does it seems that before doing the overclock i have to install a powerful CPU cooler ? Did i followed the right process for OC ? As i see people OC it till 4.7 or 5.2 even, then why am i not being able to do it ? I need your guys help.
 
rebolt said:
I just bought the i7-2600K 3.4ghz and been running it since past a week. As i want to overclock it so i performed the following procedure but it turns out to be a big mess for me and almost saved my CPU (i think so).

Procedure suggested by: Clunk.Org

Overclocking 4.00ghz

Ai Overclock Tuner - Manual

BCLK/PEG Frequency - 100

Turbo Ratio:

By All Cores (Can Adjust In OS) - 40

Memory Frequency - Set to AUTO or 1333MHz for now

DRAM Timings

CAS Latency - 9

RAS to CAS Delay - 9

RAS Pre Time - 9

RAS ACT Time - 24

DRAM Command Mode - 2T

Load-Line Calibration - Enabled High or Auto**

CPU Voltage - Manual Mode

CPU Manual Voltage - 1.120v

DRAM Voltage – Auto (Check your’s like 1.500V – Change it)

CPU PLL Voltage (Should be set to Disabled)

CPU Test

Run a Torture Test: Prime95

After i ran the torture test my CPU temps have raised till 72 degrees and then it got restarted suddenly. So i removed all the settings and now its running on default settings of 3.4ghz. Now i am wondering inspite the fact that i have an AC installed in my room which makes me room temp very low.

But one thing i have not yet done is to install a CPU cooler. I have a CM 690 II Advance cabinet with 3 additional fans installed. So does it seems that before doing the overclock i have to install a powerful CPU cooler ? Did i followed the right process for OC ? As i see people OC it till 4.7 or 5.2 even, then why am i not being able to do it ? I need your guys help.
Click to expand...

Yes you need a good aftermarket cooler before you can OC till 4.7-5.0Ghz. Though 4.0Ghz is certainly possible, all you gotta do is, first reset all the settings to optimised default. Then try by changing only the multiplier to 40. If it is still not stable then change the vcore to 1.20-1.25V manually. no need to change anything else at all.
 
thebanik said:
Yes you need a good aftermarket cooler before you can OC till 4.7-5.0Ghz. Though 4.0Ghz is certainly possible, all you gotta do is, first reset all the settings to optimised default. Then try by changing only the multiplier to 40. If it is still not stable then change the vcore to 1.20-1.25V manually. no need to change anything else at all.
Click to expand...

Ok thanks, so i need to just change the Ai overclock tuner & the multiplier. I have a little confusion when you say the Vcore that means the CPU Manual Voltage or the DRAM Voltage ?

Also while doing the stress test how much temperature it should maintain ? And while working normally ? Which CPU cooler would be best suitable if you want to OC till 4.7ghz ?
 
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