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Need some help with my overclock. i7-2600k @ 4.7GHz so far. - Page 3

post #21 of 56
Quote:
Originally Posted by LastBucsfan View Post
Yes I tried manual and went right back to offset. Is 1.43v too much? I thought Sandy Bridge was good til about 1.5v?
No, it's not too much but that's why it was that hot.
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It's a computer!
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post #22 of 56
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
No, it's not too much but that's why it was that hot.
Yes, to go from 4.7 to 4.8 GHz it took significant increase in voltage to stabilize in Prime 95 blend. I would love to do 5.0 but I will need a better cooler it seems.

If I could just get everything working right at 4.7 GHz for now that would be awesome though!
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post #23 of 56
Quote:
Originally Posted by LastBucsfan View Post
Never higher than 1.43v under load.



I thought about that, but after I disabled C3 and C6 in the BIOS it seems in CPU-Z that the voltage is just pegged at 1.368 all the time now. Whether under load or not. I'll monitor this a little more when I get home.
Then it sounds like it doesn't downclock at all. Go to control panel and power options and try to use 'Balanced mode' if it's set at 'Performance mode'.

On my system I have 'Balanced mode' as default after install.
    
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post #24 of 56
Are CPU C1E and Enhanced Intel Speedstep Technology enabled?
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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 DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #25 of 56
Thread Starter 
Quote:
Originally Posted by turrican9 View Post
Then it sounds like it doesn't downclock at all. Go to control panel and power options and try to use 'Balanced mode' if it's set at 'Performance mode'.

On my system I have 'Balanced mode' as default after install.
I can give this a try, but in Performance mode it still downclocked when C3 and C6 were enabled.

Quote:
Originally Posted by TwoCables View Post
Are CPU C1E and Enhanced Intel Speedstep Technology enabled?
Yes.
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post #26 of 56
I see you have very aggressive RAM's (GSkill Ripjaws X Series 4GB [1600 MHz 6-8-6-24-1T] ). Are you getting unstability at lower overclocks too? Try putting Command Rate to 2t instead of 1t.

Also, a quick way of testing if you have enough Vcore for Prime95 Blend is to start Prime95, select Blend, then custom, then type in 1792 -1792 for FFT's. It is the one FFT needing the most Vcore. If you can run that one for 30 minutes, you should have enough load Vcore for a certain overclock.

If still getting BSOD's, also keep in mind what I've said about LLC and light load Vcore. You may have to increase Vcore a little bit or step down to High LLC and just compensate using a higher Offset. This way you will get higher Vcore in light load VS heavy load.
    
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post #27 of 56
According to GSkills homepage, their rated for Command Rate 2t. http://www.gskill.com/products.php?index=352

CAS Latency 6-8-6-24-2N (Command Rate)
    
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post #28 of 56
Thread Starter 
Quote:
Originally Posted by turrican9 View Post
I see you have very aggressive RAM's (GSkill Ripjaws X Series 4GB [1600 MHz 6-8-6-24-1T] ). Are you getting unstability at lower overclocks too? Try putting Command Rate to 2t instead of 1t.

Also, a quick way of testing if you have enough Vcore for Prime95 Blend is to start Prime95, select Blend, then custom, then type in 1792 -1792 for FFT's. It is the one FFT needing the most Vcore. If you can run that one for 30 minutes, you should have enough load Vcore for a certain overclock.

If still getting BSOD's, also keep in mind what I've said about LLC and light load Vcore. You may have to increase Vcore a little bit or step down to High LLC and just compensate using a higher Offset. This way you will get higher Vcore in light load VS heavy load.
I will give that a try after work. Thank you.

Quote:
Originally Posted by turrican9 View Post
According to GSkills homepage, their rated for Command Rate 2t. http://www.gskill.com/products.php?index=352

CAS Latency 6-8-6-24-2N (Command Rate)
Going to change to 2T. Should I keep everything else at the stock specs?
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post #29 of 56
Quote:
Originally Posted by LastBucsfan View Post
Going to change to 2T. Should I keep everything else at the stock specs?
Yes, try the rated timings.
    
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post #30 of 56
Thread Starter 
Quote:
Originally Posted by turrican9 View Post
Yes, try the rated timings.
Everything is at the rated timings except I had the 1T wrong. I'll just change it to 2T work on some more vcore and see where that gets me.
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