I've been trying to overclock my pc to 4ghz but every time i run a burn test out freezes or i get random reboots. I have a evga x58 sli board the i7 920 cpu 6gb of ocz ram i have that clocked at 1600 2 gtx 760 runing in sli mode and a corsair 850tx psu. I overclocked the ram first i set the timings and volts that were on the ram i ran memtest 86 over night and out passed. So the next thing was the cpu at first i was getting bsod but as i increased the volts they stopped showing up. But every time i run a stress test it either freezes or reboots. How do i fix this do i keep increasing the volts??
how do i fix an unstable overclock?
- Thread starter Stemz
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OllieOxenFree
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- Jan 24, 2014
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I've got an i7-950.
I start by turning off EIST and Cx states. Disabling HT is an option to depending on what you plan to do with your overclock.
I reduce all the multipliers for ram, QPI, CPU and Uncore.
Raise the BCLK by multiples of 10 and testing. Once I get failure I start raising the voltage by multiples of 10mv. Once stability is acquired start raising the BCLK again. I do this til I find the highest BCLK while remaining stable.
Increase QPI and CPU multipliers slowly testing for stability along the way. Increase voltage in small increments as necessary to maintain stability.
Set spec voltage for RAM. Start raising multipliers for uncore and ram. Always keeping uncore:ram at least 2:1. Raise uncore voltage as nec. to maintain stability. You may have to manually set ram timings to get the freq. you want. Worry more about cpu than ram as it will show larger performance gains.
This method lets you narrow down where your instability is. I have noticed x58 boards can be tough to get stable RAM OCs. I am currently at 4.16 on cpu but I have 1600mhz 8-8-8-24 ram set at 1387mhz 7-7-7-20.
I start by turning off EIST and Cx states. Disabling HT is an option to depending on what you plan to do with your overclock.
I reduce all the multipliers for ram, QPI, CPU and Uncore.
Raise the BCLK by multiples of 10 and testing. Once I get failure I start raising the voltage by multiples of 10mv. Once stability is acquired start raising the BCLK again. I do this til I find the highest BCLK while remaining stable.
Increase QPI and CPU multipliers slowly testing for stability along the way. Increase voltage in small increments as necessary to maintain stability.
Set spec voltage for RAM. Start raising multipliers for uncore and ram. Always keeping uncore:ram at least 2:1. Raise uncore voltage as nec. to maintain stability. You may have to manually set ram timings to get the freq. you want. Worry more about cpu than ram as it will show larger performance gains.
This method lets you narrow down where your instability is. I have noticed x58 boards can be tough to get stable RAM OCs. I am currently at 4.16 on cpu but I have 1600mhz 8-8-8-24 ram set at 1387mhz 7-7-7-20.
Ive set the ram timings and I've tested it before i started messing with the cpu and it ran stable the problem is when I'm overclocking the cpu as for the qpi multiplier i was told that it had to be set to twice the frequency of the ram...so if the ram is it 8 I'd set the qpi to 16 i was also told not to mess with the cpu multiplier to leave it at x20 and just increase the bclok is that trite??
I was told to set the qpi to the lowest setting witch is 4.8 gts i believe they told me to set the uncore to twice the frequency of the ram, the cpu multiplier i was told to leave at 20 and just increase the bclock Idk if this method is correct
Yea i was reading about that. The article said that 19 or 21 were more stable The only way my multiplier is at 21is when i have turbo mode enabled or is there another way?? I'll overclock the cpu first this time I'll leave the ram stock maybe my ram is the issue
OllieOxenFree
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The 920 is limited to a bclk of 20 my 950 will go to 23 or two steps of turbo being 24 and 25. To get 21 you have to set turbo always on.
My system is right around 7gt/s. Processors aren't cookie cutters. You can't expect the exact same setting to work on every system. The BCLK is the main timer for the whole system so every time you increase it, you increase ram,qpi,uncore,and cpu freq. If you set ram first then adjust BCLK you are raising the ram freq above your prev. speed.
I've given you a good basic run down on what to adjust. I wouldn't listen to what anyone has to say if they are telling you to run specific numbers. Overclocking takes time, patience testing and troubleshooting. Its a game of reactions and counter-reactions. Make small changes at a time so you can go back to your prev stable setup easily and have fun seeing how far you can push it.
My system is right around 7gt/s. Processors aren't cookie cutters. You can't expect the exact same setting to work on every system. The BCLK is the main timer for the whole system so every time you increase it, you increase ram,qpi,uncore,and cpu freq. If you set ram first then adjust BCLK you are raising the ram freq above your prev. speed.
I've given you a good basic run down on what to adjust. I wouldn't listen to what anyone has to say if they are telling you to run specific numbers. Overclocking takes time, patience testing and troubleshooting. Its a game of reactions and counter-reactions. Make small changes at a time so you can go back to your prev stable setup easily and have fun seeing how far you can push it.
yea i started all over form the start but what i dont get is your telling me to increase the the ram qpi uncore and cpu freq. im a noob so idk what im doing to well. i reset bios i set the ram frequency x8 i left turbo on so my multiplier could be x21 i set the uncore to x16 witch is 2 times my ram. the bclk ive been increasing by 10 so far i have it at 150 that has me clocked at 3.5ghz so far my qpi freq is set to the lowest my qpi vtt is set to 1.25 my ram voltage is 1.65 and my cpu voltage is set to 1.25 so far i havent adjusted the cpu voltage does that sound about rite?? or am i doing it all wrong??
i was reading that the x20 multiplier is not stable that im better of using the x19 or x21 so i ended up turning turbo on to get the x21 to work i also noticed that i actually still had a energy saving option enabled in the bios i guess i missed it so i disabled that aswell. ive been running prime 95 for about 1 hour every time i boost the bclk and it runs just fine passes the tests dosent freeze. the cpu voltage is at 1.25 wicth is basically stock and i havent increased it yet. ive gotten no bsod either maybe it was the multiplier causing the issue. i had a question about prime 95 tho. to test the cpu do i run a blend test or do i select the otion that says large fft files??
OllieOxenFree
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Seems like you are going at it pretty well. I usually reduce the cpu multiplier to x15 or x17 to start with and ramx6/uncorex12 so that I can push bclk higher without multipliers interfering. dont start raising cpu voltage until it starts crashing from the increased bclk then small voltage increases to regain stability then back to raising bclk. When bclk is at its maximum raise cpu mulitplier to maximum while remaining stable. This may also require some increase in cpu voltage. Next see if you can get a higher QPI multiplier. Once you get that under control, raise the uncore/ram together maintaining the 2:1 ratio. You will probably have to raise uncore (vtt) voltage during this step. I am at 4.16ghz with 1.28v core and 1.36vtt to give you an idea. Again it will vary with your board and cpu.
OllieOxenFree
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I use the blend test for everything. If it is gonna crash blend will do it. What kind of cpu and mobo temps are you getting? You may get some extra stability by raising x58 IOH chipset voltage to 1.24-1.30. Stock it should be sitting around 1.1-1.16
OllieOxenFree
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K so i got the bclk at 190 that pushed me to 4ghz but my ram is underclocked it's at 1500 if i boost the bclk to 200 it puts me at 4.2ghz and my ram at 1600 the only problem is I'm getting a bsod with a error code 124 the guide i was using to overclock was saying to boost the qpi i had it set to 1.25. I've boosted it to 1.35 and I'm still getting the same bsod I've boosted the cpu vcore a couple times but it didn't seem to help any ideas??
OllieOxenFree
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Try VTT voltage first. Also this is where I was telling you that raising x58IOH chipset voltage to 1.3. If that doesnt work, try increasing vcore. If you still can't get stability then your ram may not run at that speed with the current timings (it says 1600 but it could really be running at 1604 or 1608 due to the decimal points you dont see after bclk.) You could try increasing the latencies of the memory using manual timings.
OllieOxenFree
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You could try to leave the bclk at 200 and reduce the multis for the ram and uncore temporarily to see if the stability issue is in the ram or in the cpu.
OllieOxenFree
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ya it goes by mv and usually increases in multiples of 10mv. I usually just go 10mv at a time and test. I would stick with the lower ram speeds. The gains from the extra 100mhz will be something you will never notice other than during a ram benchmark. As you can see, I also have my ram underclocked from 1600 because it has proved to be far more stable. I had loosened timings and ram speeds at 1735mhz on 1600mhz ram but I noticed no gains in performance so I dropped the multiplier which allowed me to drop ram voltage from 1.65 to 1.5, reducing heat output
OllieOxenFree
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this is so frustrating lol i backed of settings to the ones that worked before and its freezeing and giving me bsod now im going to have to start over -_-. the problem with setting the bclk to 200 is that it puts my ram at 1602 i would have to be using 190 or 195 and that puts my ram at 1550 and my cpu at 4ghz or so. also my board under the the cpu uncore feature does not give the setting to set it x12 under the memory setting i can set the clock to x6 but under uncore the settings it gives me is either auto or x16. another thing to you told me to adjust the ioh to 1.3 theres also another setting its ich what is that used for and would i have to adjust it?? any ideas im lost lol thanks
OllieOxenFree
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No need to change ich. That is for the chipset core. It doesn't apply to your oc. Does your bios have a place to save OC profiles? Mine has 8 so I make a lot of saves along the way to a high OC that way I have a lot of options to default back to. Leave your uncore on 16 since you have no other setting but auto. I have mine set to x21 so you should be able to stay stable on 16.
Its supposed to be fun. If it gets frustrating, you default bios settings and come back to it some other time.
Its supposed to be fun. If it gets frustrating, you default bios settings and come back to it some other time.
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