My i7 overclocking failure


i7 920 processor, d0 stepping
GIGABYTE GA-EX58-UD4P Motherboard
12 GB OCZ Gold RAM
GTX 295 Video Card
Corsair 850W PSU
Antec 1200 Full Tower Case
Prolimatech Megahalem Heatsink with AS5 thermal compound

I reset my CMOS Switch and then changed these settings:

36x QPI Linkspeed
6x Memory Multiplier
36X Uncore QPI Linkspeed
13x Uncore Frequency
Turbo Boost Tech on, Speedstep/C1E on, Turbo Performance Enhancement On

Starting off from a base clock of 133 and 1V VCore, I started raising the baseclock by intervals of 10. These were my findings:

VCore: 1, Baseclock: 143 --- boots into Windows, Prime95 runs without issue, 3 GHz achieved (143*21)
VCore: 1, Baseclock: 153 --- doesn't boot into Windows
VCore: 1.01250, Baseclock: 153 --- Bluescreened at login screen.
VCore: 1.05, Baseclock: 153 --- boots into Windows, Prime95 runs without issue, 3.212 GHz achieved (153*21)
VCore: 1.1, Baseclock: 163 --- boots into Windows, Prime95 runs without issue, 3.422 Ghz achieved (163*21)
VCore: 1.1, Baseclock: 173 --- bluescreen before login
VCore: 1.125, Baseclock: 173 --- Prime95 bluescreens upon running
VCore: 1.13750, Baseclock: 173 --- boots into Windows, Prime95 runs without issue, 3.632 Ghz achieved (173*21)
VCore: 1.2, Baseclock: 183 --- Prime95 bluescreens upon running
VCore: 1.21250, Baseclock: 183 --- boots into Windows, Prime95 runs without issue, 3.842 GHz achieved (183*21)
VCore: 1.2750, Baseclock: 193 --- boots into Windows, Prime95 runs without issue, 4.053 GHz achieved (193*21)
VCore: 1.3, Baseclock: 200 --- bluescreens upon Windows login

At the higher levels, the overvoltage lights turned green as well on my mobo.

And now for the anger-inducing part:

VCore: 1.275, Baseclock: 200 --- bluescreen
VCore: 1.25V, Baseclock: 193 --- bluescreen
VCore: 1.21250, Baseclock: 183 --- doesn't boot
VCore: 1.25, Baseclock: 183 --- doesn't boot

What on earth is going on? Did I do something incorrectly? My old setups stopped working.

I am back at default settings but with .95V right now, 2.8 GHz at load, because I'm damned scared I am going to break ***.
32 answers Last reply
More about overclocking failure
  1. Try upping the QPI voltage a bit, that worked for me.
  2. How do I know what VCore to use? How do I know what QPI voltage to use?

    Why do I need to UP the voltage if my overvoltage lights are lighting up?
  3. What are some default values I can set at stock levels, and what should my adjustment process be?
  4. Well, ~1.25V for both QPI and CPU voltage would be a good starting point, try to see if you can go lower, I have 1.21875V on both, but I'm running at only 160bclk.
  5. Even though you have the x 6 mem multiplier, change the voltage to 1.65 for ram
  6. Dude you messed up, disable Turbo when overclocking, it will limit your overclocks, and read some guides before you overclock. Clearly, you are a noob, I know the truth hurts. Go read overshocked's guide
  7. I actually got it working 4.2 Ghz on air
  8. Good job, got a screenshot? What you using at 4.2, hardware, bios settings
  9. 36x linkspeed, 6x memory multi, 16x uncore multi, 20x cpu clock, 200 backclock, 1.325 VCore, 1.335 VTT, 1.22 IOH, 1.64 VDIMM, Turbo on, C1E off, multithreading off
  10. nice what hardware u using, is that temps at load?? you can keep going ur vcore isnt high at all. is that stable 24/7 tested with prime?

    turbo might make it unstable when testing, most overclockers turn it off.
    i would keep going if i were u if those were load temps.
  11. My load temps are around 70-74C max load, and Prime95 ran it overnight

    However I am also trying to find a good OC for my 295 NVidia card. Is it better to do a lower CPU clock with a higher GPU clock or are they independent?
  12. i tell you this with experience anything higher than 3.8ghz on the i7 920 will not make a difference, so save some power to reduce elect bill. overclocking higher than 3.8 is just for enjoyment basically or tryin to do some record breaking

    overclocking the video card is a must, but it doesnt overclock that much.

    and again what hardware you use, cpu cooler

    im pretty sure u got a great sample of that chip, ur vcore isnt that high for 4.2ghz

    also what is your ram speed at.
  13. RAM speed is @ 1200 at 6-6-6-18 timings. Gigabyte ud4p mobo, prolimatech megahalem heatsink with AS5 compound, antec 1200 full tower case, corsair 850w Psu

    But I mean can I get better GPU results at 4.2 or 4 or 3.8?
  14. oh, now i understand your question. the two are independent, it wouldnt matter if ur at 3.8 or 4.2

    nice heatsink btw, i suggest you keep it 3.8 or 4.0 for 24/7 use to save on electricity bill

    the gpu will only overclock a bit because gpus are different than cpus. unless change the gpu voltage and voiding warranty and not recommended to do that (still wont be a large overclock) so just use rivatuner. monitor gpu temps with gpu z, i think rivatuner has monitor too.

    gpu temps should be under 80C for 24/7 use. the thermal shutdown is around 110C
  15. I had my GTX clocked to some given level, and I left HL2 on to go eat dinner... I came back and my game had frozen. Restarting my computer, I kept finding that my thing would freeze after like 30s. Putting my GTX back to default worked, but I can't figure out why it'd be freezing -- it's like 50C idle!
  16. HL2 the benchmark in 3dmark? clarify please

    what is "freeze after like 30s"

    freezing as in 0 fps or actually the window is frozen and you have to restart the computer

    how much was the overclock, was it in the memory clock or core clock or shader clock and in what program rivatuner? temperature is not ur problem.
  17. HL2 the game

    And yes, after logging in, the computer would freeze after 30s and I'd have to restart. Lowering the GPU clocks helped.

    The clock was 670/1444/1134 100fan

    EVGA Precision tool used to OC
  18. it might be a problem with the game then, try a different game. use Fraps and do some testing before and after

    what is the stock clocks then since overclock is 670/1444/1134
  19. 576/1242/1008
  20. haha maybe that's why, try lowering your overclock to


    and as stated above have you tried to use a diff game
  21. Yeah, I just need a more certain method of stability testing the GPU clock settings.

    Is it safe to be running a GTX 295 on high temps (say, 90C) for however long you need to run stability tests for?
  22. Yes it is safe for 90C for just testing not recommended for 24/7 use, just try to keep it under 100C, because around 110C is thermal shutdown if i remember correctly.
  23. I don't think any games run it up to 90C anyway. How long does one need to test their card for to ensure stability under OCCT GPU test?
  24. I never used OCCT GPU test before, I just play crysis for 1 hour, if it doesn't fail then it's good. So is my suggested overclock working or not? If not then there's a problem because it's just a small overclock vs. your bigger overclock. Remember to keep in mind that GPU overclocking can't go up that much, so don't get your hopes up.
  25. 625/1350/1050 seems to work just fine -- I'm just trying to see how far I can push it without it dying on me, and with proper clock ratios.
  26. Haha I'm glad it worked and I'm here to help out :D
    Again, GPUs can't be pusehd that much, I suggest uping the core clock and memory the most to achieve the best results. Shader isn't much of a big deal in the performance charts.
  27. Really?! I heard the exact opposite... now I don't know what to believe X_X
  28. Heard of exact opposite which you mean or what you mean...the shader?? Upping the core speed is the most important, then the memory, then the shader. Balance it out if you can, but I suggest core and memory most. Shader is already good already.
  29. Yes I heard it was Shader then Core then Memory in terms of importance -- I'm not really sure what does what or why
  30. increasing the core speed will help the overall performance..the time it takes to render will be shorter, thus moving into the next render will be faster correct?
    memory because you want faster data transfer rate..
    shader only if the game you play is like uses the most shaders or whatever..its least important.
    find some articles, and decide on your own.

    its just like overcloking the cpu, which will increase performance overall, just like gpu core speed..its almost the same concept (just example for comparing better understanding.)

    well the results speak best right..test out on your own, see what overclock has the best fps..

    most of the time, if you increase shader to high then the rest wont overclock much.
  31. Maybe that is the problem... (bumping my shaders up too high relative to the rest)?
  32. Like I mentioned above, you probably didn't read.

    I said "well the results speak best right..test out on your own, see what overclock has the best fps.."

    so test it out like first, use fraps to see the average fps results..use a intensive game...

    up core/mem and leave shader
    up core/mem/shader
    up core/shader
    up shader only...etc
    find which way is best for the most fps you get out of.
Ask a new question

Read More

CPUs Overclocking Intel i7