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Intel i7 2600k overclocking questions

post #1 of 17
Thread Starter 
Umm... hello there. I am pretty new to this forum, but I have found people around here to be pretty willing to help the noobs (like me) at overclocking no matter how incompetent they are. So just wanted to start by saying thanks on behalf of the noobs like me.

Here is my question. I am getting a new rig soon, which I hope will last me a few years. On the computer, I play LOTS of games, I do 3d animation, I edit and render videos, I do a lot of photoshop and animation, I write programs, I watch youtube videos, check my email, etc etc... needless to say, I spend a lot of my time at the computer... So for someone like me, who at times requires highly intensive processing speeds (for example, playing games or more importantly animation stuff) for like 40% of the time on the computer, but on the other 60% of the time, does things that require little processing speed (like watching youtube videos or browsing forums), what would be my overclocking options?

I plan on getting an intel core i7 2600k processor. I don't want to have a super high overclock speed or anything, I just want a decent one that will make sure that I can run everything smoothly. I don't know a lot about how processors work and clock speeds, but is there a way that I can have a low clock speed normally, but allow my computer to go over 3.4 GHz (Maybe have a max of like 4.2 GHz) when it is required? Also, I am not too sure on how many volts or whatever to set it at. Is there a way to allow my computer to automatically use as many volts as it needs and go to whatever clock speed it needs? (Within boundaries of course)
post #2 of 17
First off, 2600k is a great choice. Next, overclocking on Sandy Bridge is amazing. Not only are you looking at really high OCs, you can also leave power saving features on such as Speedstep and C1E. As I'm typing this, my CPU is running at 1600mhz @ 0.944v. When I actually do something intensive, it instantly ramps up to my 4.7ghz OC. So basically, overclock it as much as you want. Voltage varies wildly depending on the quality of the processor and what frequency you want it running at.
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post #3 of 17
Your 2600k will have the Speedstep feature which would basically run your processor at slow speeds until the system feels the need to boost speed automatically. You could either do that or set your overclock profile manually when you feel the need to OC but that's a bit much work.

As far as using automatic voltages, it's best not to. Motherboards tend to be generous with the voltage when set to auto.

As far as figuring out voltages on your own, it's best to use the stock voltage and raise the multiplier until things get unstable then add more voltage as you go along. There is more to overclocking than CPU voltage but if you ask nicely, people will be more than glad to help you out.
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post #4 of 17
It'll be much simpler than you think, especially if you get a board from the ASUS P8P67 series. Achieving 4.5GHz or even 4.8GHz should be a walk in the park if you get an aftermarket CPU cooler to replace the stock one, and there will also actually be no need for it to stay at stock for certain things but then use your overclock when you want it to.

However, you'll also be able to save different BIOS profiles. So you could save one that is stock and one that's all overclocked. This way, all you'd have to do is reboot, go into the BIOS, switch profiles, press F10 to save and exit, and then you're good to go. Don't worry about how long it would take to switch profiles though: these systems are extremely fast.
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post #5 of 17
Welcome to OCN !

I assume I can answer your questions.

CPU work with multiplier. 2600K has an unlock multiplier, which means that it doesn't stress the motherboard that much because you will not touch the base clock (aka FSB or BCLK).
To achieve a desired overclock, simply take you number (say 4.5 Ghz) and divide it by 100 (that is your base clock). That leads you to a multiplier 45.

Nowadays all CPU have a power saving feature that force the CPU tu run at a low multiplier (low clock) if you're using heavy applications. It's called the idle clock. That means low energy cost (lower the voltage) and low temperature.

But when you launch a game or an heavy application (like rendering a video) CPU will jump the multiplier to the value you set in the BIOS.


Now for the 2600K you could begin with 4,5 Ghz @ 1,35 V.
To do so, simply up the mutilplier to 45 and set manually the Vcore to 1,35 V

Remember to set the exact timings for you specific RAM modules (or you could have stability problem).

If you computer boots up fine into windows, run some stability programs (Prime 95 and LinX or Intel Burn Test or OCCT ...) for a fair amount of time (longer is better but I do recommend overniht). keep an eye on the temperature (using Core Temp for example).
If your comptuer doesn't boot or BSOD during stress tests, up the voltage a bit and retry. You won't hurt the CPU until you hit 1,52 V and 85 °C.


When you'll buy the parts try to spare some money and buy an after market cooler in order to cool your CPU that would become quite warm.
I do not recommend to overclock with the stock cooler.


Hope I helped.

Kerian
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post #6 of 17
Even hitting 85°C is safe.

Also, 1.525V is safe for short periods of time. I've seen people send way more core voltage through their 2500K or 2600K just for an impressive CPU-Z validation, or for insane benchmarks. However, the recommended limit for 24/7 use is approximately 1.425V.
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It's a computer!
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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post #7 of 17
Thread Starter 
Here is my build. Is this agreeable?

CPU : Intel Core i7-2600K Sandy Bridge 3.4GHz (Will oc to... 4.2 GHz?)
MOBO : Asrock z68 gen3 Fatality
SSD : Crucial M4 Sata3 SSD60GB
HD : WD Black Sata3 6pbps 1 TB
DVD : LG GH22NP20 22X IDE SecurDisk DVD +/- RW
GPU : Gainward phan GTX 580 3GB (1 More in a few months)
PSU : Seasonic X series 850w
RAM : G-Skill Rip Jaw X CL7 2x4GB
CASE : Cooler Master HAF X Full Tower Black
O/S : Microsoft Windows 7 professional
Cooler: Cooler master V6gt(I know it isn't amazing, but I like things to look nice, and it followed the black and red colour scheme)
post #8 of 17
4.2 GHz will be easier than breathing. 4.8GHz should be as easy as breathing. However, this is provided you get a decent aftermarket CPU cooler.

Anyway, I like that build! Although, the motherboard is a little too much if all you're hoping for is 4.2GHz.
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Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
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Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #9 of 17
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
4.2 GHz will be easier than breathing. 4.8GHz should be as easy as breathing. However, this is provided you get a decent aftermarket CPU cooler.

Anyway, I like that build! Although, the motherboard is a little too much if all you're hoping for is 4.2GHz.
Well I don't want to put it too high, cause at this day and age, I won't need more than 4.2 I don't think. However, as I stated earlier, I do want this to last me a long time, so when mainstream processors are at 5GHz, I might put it up then. =D
post #10 of 17
Thread Starter 
Also, I might want to add that I live in singapore, it is HOT and humid all year round, only one season. Pretty much summer at 30 degrees c all 12 months with really sticky humid weather. So OC might be a bit tougher for me.
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