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Help Needed, OC on p67a-ud7 with i7 2600k

post #1 of 6
Thread Starter 
Hi everybody I am new to overclocking and also to overclock.net. I would be extremely grateful to recieve some help with the problem I am having.
I have read several guides to OCing the i7 2600k and to be blunt I am not having much luck. I have read everyone saying that you can leave everything auto and just up the multiplier till you get to about x45 or if you're lucky x48 before having to manually fiddle with the voltages. but this just isn't working for me, and I am also not getting consistent results with stress testing.
I had the multi at x43 and everything auto and I managed 2hrs of prime95 with no problems. I then tried to manually adjust the voltages down to see if I could get temps down so I started stepping down from what it had been set at with auto (vcore 1.345) but it just wouldn't stabilise. So, I went back to auto and tested again to just make sure and I couldn't get it to last more than 30 seconds of prime95 before BSOD with 124 error code even though the settings were the same!! I am now running prime95 with an x40 multi to see how that does but to be honest I was hoping to get at least x46 with good temps and volts. I earlier tried x45 with manual voltages up to about 1.38 vcore and it would not even get into Windows so I went back to lower clocks for now.
Is it just inexperience or have I been unlucky and got a poor chip? Please help!!
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post #2 of 6
Welcome to OCN.

First, go here and fill out the form: http://www.overclock.net/specs.php?do=addsystem

So for overclocking, you don't want to leave many things at stock. First, set the cpu voltage to stock. I believe stock voltage is about 1.22v. Then, you're going to also set the cpu multiplier to stock. Don't set it to auto though. Then find your memory multiplier and set it to stock. Then find something that says "dram voltage", or "memory voltage". Set that to the stock voltage of your ram. Don't set it any higher though. You can set it lower if you like.

Start by bumping the bclk up by about 5-10mhz. Boot back into windows and stress test. Make sure your tempatures don't go above 80c or your chip will degrade. If you pass about 6 hours, then bump up the bclk by another 5-10mhz. Keep on going until you crash before 6 hours. Then you can stop overclocking, or add more voltage. If you add more voltage, add about 0.025v at a time. Don't go above about 1.4v either. When you find the point where your tempatures are getting close to 80c, then thats probably your max oc.
    
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post #3 of 6
I'll put my settings up in a sec... This should at least give you an idea of where to start:

Alright, start off by going into BIOS by mashing "delete" at the startup.

1. Go into the tab called "MB Intelligent Tweaker (MIT).
2. Go into "Advanced Frequency Settings"
-Enable "BCLK/DMI/PEG Clock Control"
-Set the "Frequency" to 1002

3. Go into "Advanced CPU Core Features
-Set "CPU Clock Ratio" to x44
-Leave "Internal CPU PLL Overvoltage" on "Auto"
-"Enable" Real-Time Ratio Changes in OS
-Disable "C1E"
-Disable "C3/C6"
-Disable "CPU Thermal Monitor"
-Disable "CPU EIST Function"

4. Go back a few pages and find the tab called, "Advanced Voltage Settings"
-Set "Multi-Steps Load-Line" to "Level 5." This will keep your vdroop at roughly 0.1 volts of what you have it the bios whether on load or in idle.
-Set "CPU Vcore" to "1.3V." You can probably lower this at a later point, but this should be sufficient to at least keep you stable at 44x.
-Set "QPI/Vtt Voltage" to "1.120v"
-Set "System Agent Voltage" to "1.135"

Save your settings and check CPUZ to make sure your settings are correct while booted into whatever. Then, run Prime95 and see if your system is stable.

Note: I did not adjust anything with your memory, so you'll have to do that yourself.

Edit: Make sure you're using the newest F4 BIOS, or you'll be limited to what level you can adjust the load-line calibration.
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post #4 of 6
Thread Starter 
Thanks for the responses guys I have updated my system specs form as advised. Willanhanyard, I think the method you prescribed doesn't apply to the Sandy Bridge chips but thanks all the same I appreciate any and all help and advice because I am a bit of a noob at this sort of thing .
Jivenjune, I should maybe have put a bit more information down on the initial thread but I didn't want to make it too long and bore people before they read it! So things I had already done in bios are as follows:

CPU PLL voltage : Enabled
C1E: Disabled
C3/C6: Disabled
CPU Thermal Monitor: Disabled
CPU EIST: Disabled

My ram was set up as rated on the sticks so that was for 9-11-9-28-2t with 1.6v and 2133mhz.

Load line was disabled as I was unsure of its effect (so thanks for the explanation)
Vcore was auto
QPI/Vtt was auto
System Agent was auto
My BCLK is set at 1000 in bios and in CPU-Z is displayed as 100.3mhz so do I really need to adjust it to 1002? Isn't that for when CPU-Z shows it as 99.8mhz?

bios version is f4

I had another go yesterday with these settings and managed 3hrs prime 95 with x40, x42 and x43. System didnt bsod, I stopped the test as it seemed ok and temps didnt peak over 62C and for the most part were floating around the high 50's.
When I tried x44 I got bsod with error 124.

I will try the settings you stated when I get chance later today and post back. Thanks again for the advice!
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Core i7 2600k Gigabyte p67a-ud7 B3 2x Zotac gtx 560ti Amp! edition sli 4 x 2gb G.skill Ripjaws X 2133mhz 
Hard DriveOptical DriveOSMonitor
120gb OCZ Agility 3 ssd / Crucial C300 128gb ssd 2x Samsung DVD rewriter Windows 7 Iiyama 24" Prolite E2403WS 
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Thermaltake Toughpower 750 W Cooler Master HAF X 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600k Gigabyte p67a-ud7 B3 2x Zotac gtx 560ti Amp! edition sli 4 x 2gb G.skill Ripjaws X 2133mhz 
Hard DriveOptical DriveOSMonitor
120gb OCZ Agility 3 ssd / Crucial C300 128gb ssd 2x Samsung DVD rewriter Windows 7 Iiyama 24" Prolite E2403WS 
PowerCase
Thermaltake Toughpower 750 W Cooler Master HAF X 
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post #5 of 6
Thread Starter 
OK so to update, I input the settings as you described and x44 went 6hrs prime95 with no errors, perfect! I am now going for x45 and have had to try a few attempts upping vcore a notch each time, I am now on 1.335v and have upped the LLC to level 6 and am about 1 1/2 hrs in. Previous runs with lower vaultage got me a bsod after about 45mins so I am feeling pretty confident I've hit the right voltage for x45 this time so fingers crossed.

Could you answer another few questions for me please?
How do you arrive at the settings you gave me for QPI/Vtt and System Agent and under what circumstances would I know when to raise or lower these?
With regards to temperatures, for the most part mine are pretty good but across the cores the variation gives me cause for concern. as core #0 and core #3 show maximums of 66c, core #1 is 70c but core #2 is 72c! This only occurs for about a minute nearly 20 mins into the test and for the rest of it just flits between 67-68c but I feel I am going to be governed by this one core getting hotter than the others, especially as I get to higher clock speeds. So I guess the question is if the temp is only at that high point for a minute is the temperature it sits at for most of the time (which makes me assume the average temp is lower) the one I should pay attention to?
Also for comparison, CPUID Hardware Monitor displays the temps as 2 degrees lower than realtemp and core temp, so what should I pay attention to most; Higher, lower or average?
Sorry if I'm not being very clear. I have attached screenshot if that helps.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600k Gigabyte p67a-ud7 B3 2x Zotac gtx 560ti Amp! edition sli 4 x 2gb G.skill Ripjaws X 2133mhz 
Hard DriveOptical DriveOSMonitor
120gb OCZ Agility 3 ssd / Crucial C300 128gb ssd 2x Samsung DVD rewriter Windows 7 Iiyama 24" Prolite E2403WS 
PowerCase
Thermaltake Toughpower 750 W Cooler Master HAF X 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600k Gigabyte p67a-ud7 B3 2x Zotac gtx 560ti Amp! edition sli 4 x 2gb G.skill Ripjaws X 2133mhz 
Hard DriveOptical DriveOSMonitor
120gb OCZ Agility 3 ssd / Crucial C300 128gb ssd 2x Samsung DVD rewriter Windows 7 Iiyama 24" Prolite E2403WS 
PowerCase
Thermaltake Toughpower 750 W Cooler Master HAF X 
  hide details  
Reply
post #6 of 6
Welcome to OCN!
给力鸡
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给力鸡
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