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Thread: OC Help: 3.58GHz Q6600 & EP45-UD3P




  1. #41

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    Try enabling Load Line calibration. With your current voltage settings you should be able to be stable at 3.2GHz minimum. I wouldn't even bother with "extensive" stability tests with anything lower than 3.2GHz.

    Once you've decided on how far you want to OC, you can try lowering the CPU vcore to the minimum required amount by doing 10 minute to 1 hour OCCT tests before proceeding with extensive P95 tests.

    I'm currently at 3.2GHz with a vcore of 1.2875 (1.25 actual during load) with LLC enabled. My core temps don't go above 62C now during full load.

  2. #42
    Join Date
    Jan 2009
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    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    Quote Originally Posted by imprezastipwr View Post
    Try enabling Load Line calibration. With your current voltage settings you should be able to be stable at 3.2GHz minimum. I wouldn't even bother with "extensive" stability tests with anything lower than 3.2GHz.

    Once you've decided on how far you want to OC, you can try lowering the CPU vcore to the minimum required amount by doing 10 minute to 1 hour OCCT tests before proceeding with extensive P95 tests.

    I'm currently at 3.2GHz with a vcore of 1.2875 (1.25 actual during load) with LLC enabled. My core temps don't go above 62C now during full load.
    Okay, I will try that. Correct me if I am wrong, but in order to get 3.2, I will need to decrease the mhz of the memory to increase the FSB frequency which gives me a higher CPU Mhz. Is this correct? This is why you had 769mhz memory vs my 987mhz DDR2 800 Corsairs, right? Also, which strapping will I need to use for the new 3.2ghz?

    It gets pretty warm here in the summer so I do not want to go too high on the temps. I would like to run this 24/7 without lowering the speed for summer.

    What exactly does load line calibration do? Also, last night I bumped the voltage down from 1.40v to 1.2375v and after 5hrs of P95 at 29.6Ghz. I received an error on core 0 only. Could tweaking some of the other values have helped keep the core stable? I am just wondering.
    Last edited by reason; 01-15-2009 at 01:09 AM. Reason: added mhz and frequency question
    Intel Q6600 2.4ghz Quad Core @ 3.2ghz OC
    Xigmatek HDT-S1283 120mm Rifle CPU Cooler
    Corsair 8GB (4 x 2GB) DDR2 800 (PC2 6400)
    Gigabye GA-EP45-UD3P
    Basic Tower Case 3x 80mm Fans (with side vent and cone)
    Lite-ON DVD Burner iHAS220-08
    Western Digital Caviar SE16 500GB WD5000AAKS SATA 3.0Gb/s
    Jaton GeForce 7300GS 256MB 64-bit GDDR2 PCI Express x16
    Cooler Master Real Power Pro RS-650-ACAA-A1 650W ATX Form Factor 12V V2.3

  3. #43

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    For 3.2GHz, I have a 400MHz FSB with a x8.0 ratio. Therefore, my memory is at 800MHz.

    Load line calibration will reduce vdroop, making your CPU vcore more manageable and can help with your OC. In other words, LLC will lower the wide gap between the BIOS set CPU vcore and actual vcore (reported by CPU-Z for example). Personally, I have been able to achieve a lower required CPU vcore with LLC enabled. Use CPU-Z or OCCT to determine what your actual CPU volts are during idle and full load.

    Record your temps during idle and full load when you're testing. If your case has sufficient airflow and cooling, you should be able to run 3.0-3.2GHz (possibly 3.4) without any temp issues. I was able to get stability at 3.6GHz (max temps around 69C w/ 1.41 actual vcore) and 3.4GHz (max temps around 65C w/ 1.38 actual vcore). However, currently comfortable with 3.2GHz as my temps don't rise above 62C with a significantly lower actual vcore at 1.25.

    With LLC enabled my BIOS set CPU vcores translated to the following actual vcores during load:
    3.6GHz - 1.45000 set - 1.41 actual
    3.4GHz - 1.41825 set - 1.38 actual
    3.2GHz - 1.28750 set - 1.25 actual

    Keep in mind, your cooling setup is different from mine. I suggest upgrading to 120mm fans if possible and purchasing either of these CPU coolers:

    Thermalright HR-01 Plus
    Thermalright Ultra-120 eXtreme

    I'm very satisfied with the HR-01 Plus as my 5x 120mm case fans (2 intake, 2 exhaust, 1 CPU) are running at 7 volts (50-60%) to achieve near silent operation. The HR-01 Plus may be better suited for you as well since it functions very well with limited airflow (i.e. 3x 80mm case fans). Make sure you purchase a quality accompanying 120mm fan for the CPU heatsink as well. I'm using the Yate-Loon/Nexus D12SL-12.

    I'm not sure if you're interested in a quieter computer setup, but silentpcreview.com has an excellent list of recommended fans of varying sizes here.
    Last edited by imprezastipwr; 01-15-2009 at 05:26 AM.

  4. #44
    Join Date
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    32

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    Quote Originally Posted by imprezastipwr View Post
    For 3.2GHz, I have a 400MHz FSB with a x8.0 ratio. Therefore, my memory is at 800MHz.

    Load line calibration will reduce vdroop, making your CPU vcore more manageable and can help with your OC. In other words, LLC will lower the wide gap between the BIOS set CPU vcore and actual vcore (reported by CPU-Z for example). Personally, I have been able to achieve a lower required CPU vcore with LLC enabled. Use CPU-Z or OCCT to determine what your actual CPU volts are during idle and full load.

    Okay. I did a little research on this also and it makes perfect sense.

    Record your temps during idle and full load when you're testing. If your case has sufficient airflow and cooling, you should be able to run 3.0-3.2GHz (possibly 3.4) without any temp issues. I was able to get stability at 3.6GHz (max temps around 69C w/ 1.41 actual vcore) and 3.4GHz (max temps around 65C w/ 1.38 actual vcore). However, currently comfortable with 3.2GHz as my temps don't rise above 62C with a significantly lower actual vcore at 1.25.

    I am thinking 3.2/3.0 even 2.9 would be fine for me. At 2.9ghz w/ 1.25 vcore and I am seeing 50 50 48 45 max temps on load with Prime95 stress. I dont want to get into the upper 50's/lower 60's if I dont have to.

    With LLC enabled my BIOS set CPU vcores translated to the following actual vcores during load:
    3.6GHz - 1.45000 set - 1.41 actual
    3.4GHz - 1.41825 set - 1.38 actual
    3.2GHz - 1.28750 set - 1.25 actual

    Keep in mind, your cooling setup is different from mine. I suggest upgrading to 120mm fans if possible and purchasing either of these CPU coolers:

    Thermalright HR-01 Plus
    Thermalright Ultra-120 eXtreme

    I'm very satisfied with the HR-01 Plus as my 5x 120mm case fans (2 intake, 2 exhaust, 1 CPU) are running at 7 volts (50-60%) to achieve near silent operation. The HR-01 Plus may be better suited for you as well since it functions very well with limited airflow (i.e. 3x 80mm case fans). Make sure you purchase a quality accompanying 120mm fan for the CPU heatsink as well. I'm using the Yate-Loon/Nexus D12SL-12.

    I'm not sure if you're interested in a quieter computer setup, but silentpcreview.com has an excellent list of recommended fans of varying sizes here.
    Thanks for your recommendations and input. I just built this system and I am not really looking at purchasing another HSF at this moment and my case only has options for 3 80mm fans. I know my case is not the best being that is only has 2 80mm Fans for exhaust and 1 80mm fan on the side (which is not being used cuz I have the case door off. The Xigmatek is a little taller than my case is deep but I have made some modifications to the chassis door to get it on with the fan and the cone on the outside of the case) but it does have the 120mm fan on the xigmatek S-1283. I have heard that I can replace this fan for a better one so I might look into that just to lower the temps a few degrees. Nothing major.

    I am not looking for an extreme overclock, realistically, I would be happy with the 2.9ghz but I want to see the difference in performance, responsiveness and most importantly temps with my current system setup.

    I have logs, notes and cmos files for future reference so if I need to kick the cpu down to something slower in the summer, I am willing to do that. I am not a hardcore gamer but I do enjoy playing some (RTS's, Beyond Good and Evil, Left 4 Dead, etc), I most surf the web, watch some shows and movies.
    Intel Q6600 2.4ghz Quad Core @ 3.2ghz OC
    Xigmatek HDT-S1283 120mm Rifle CPU Cooler
    Corsair 8GB (4 x 2GB) DDR2 800 (PC2 6400)
    Gigabye GA-EP45-UD3P
    Basic Tower Case 3x 80mm Fans (with side vent and cone)
    Lite-ON DVD Burner iHAS220-08
    Western Digital Caviar SE16 500GB WD5000AAKS SATA 3.0Gb/s
    Jaton GeForce 7300GS 256MB 64-bit GDDR2 PCI Express x16
    Cooler Master Real Power Pro RS-650-ACAA-A1 650W ATX Form Factor 12V V2.3

  5. #45

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    Sorry, I didn't notice the Xigmatek in your sig. I would try for 3.2GHz since CPU load won't typically be as strenuous as they are during P95 tests.

  6. #46
    Join Date
    Jan 2009
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    32

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    Quote Originally Posted by imprezastipwr View Post
    Sorry, I didn't notice the Xigmatek in your sig. I would try for 3.2GHz since CPU load won't typically be as strenuous as they are during P95 tests.
    No problem. I pro'lly should list the CPU and the cooler as the first couple of items but I listed them in the order that I purchased them.

    Quick question: Whats a good Prime95 stress duration? 24hrs/16hrs/12/hrs/8hrs/6hrs/2-3hrs? I remember your post about getting reboots 2-3hours into it and last night I got a hardware error at 5hrs.

    Also, what about OCC? What duration should I use? Also, is P95 better than OCCT because it stresses 4 cores at one time compared to OCCT's 2?

    I have not increased the CPU yet, I am still running prime95 to make sure all is ok for my records.

    Thanks!
    Intel Q6600 2.4ghz Quad Core @ 3.2ghz OC
    Xigmatek HDT-S1283 120mm Rifle CPU Cooler
    Corsair 8GB (4 x 2GB) DDR2 800 (PC2 6400)
    Gigabye GA-EP45-UD3P
    Basic Tower Case 3x 80mm Fans (with side vent and cone)
    Lite-ON DVD Burner iHAS220-08
    Western Digital Caviar SE16 500GB WD5000AAKS SATA 3.0Gb/s
    Jaton GeForce 7300GS 256MB 64-bit GDDR2 PCI Express x16
    Cooler Master Real Power Pro RS-650-ACAA-A1 650W ATX Form Factor 12V V2.3

  7. #47

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    The latest version of OCCT stresses all cores and is similar to the P95 small FFT tests. Generally, OCCT will come up with errors quicker than P95 (which is more thorough).

    Personally, I use both by starting with OCCT and getting stability for 1-2 hours. Then Prime95 on large FFT or blend tests for 8-24 hours.

    After testing my current system in P95, I noticed that most errors occured in the 224-128k range.

  8. #48
    Join Date
    Jan 2009
    Posts
    32

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    Quote Originally Posted by imprezastipwr View Post
    The latest version of OCCT stresses all cores and is similar to the P95 small FFT tests. Generally, OCCT will come up with errors quicker than P95 (which is more thorough).

    Personally, I use both by starting with OCCT and getting stability for 1-2 hours. Then Prime95 on large FFT or blend tests for 8-24 hours.

    After testing my current system in P95, I noticed that most errors occured in the 224-128k range.
    So is occt faster than prime95? I would assume you would just use prime95 instead. That is what I was doing before and it would find something within 10mins to 5 hrs.
    Intel Q6600 2.4ghz Quad Core @ 3.2ghz OC
    Xigmatek HDT-S1283 120mm Rifle CPU Cooler
    Corsair 8GB (4 x 2GB) DDR2 800 (PC2 6400)
    Gigabye GA-EP45-UD3P
    Basic Tower Case 3x 80mm Fans (with side vent and cone)
    Lite-ON DVD Burner iHAS220-08
    Western Digital Caviar SE16 500GB WD5000AAKS SATA 3.0Gb/s
    Jaton GeForce 7300GS 256MB 64-bit GDDR2 PCI Express x16
    Cooler Master Real Power Pro RS-650-ACAA-A1 650W ATX Form Factor 12V V2.3

  9. #49
    Join Date
    Jan 2009
    Posts
    32

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    Quote Originally Posted by imprezastipwr View Post
    The latest version of OCCT stresses all cores and is similar to the P95 small FFT tests. Generally, OCCT will come up with errors quicker than P95 (which is more thorough).

    Personally, I use both by starting with OCCT and getting stability for 1-2 hours. Then Prime95 on large FFT or blend tests for 8-24 hours.

    After testing my current system in P95, I noticed that most errors occured in the 224-128k range.
    Hey why are you running at 400mhz FSB and 8x cpu multiplier just out of curiosity? Is that the only way you could get stable?

    Right now I am at 3.2ghz w/ 9x multiplier @ 1.275v vcore and 854mhz memory frequency (per EasyTune6) and a 2.4 strab B @ 333mhz (I believe) and load temps at 54 51 54 48 at a little over 4 hours stress with Prime 95.

    Just crashed in prime after 4hrs of stressing. I have moved on to your recommended 1.28750v and testing now.
    Last edited by reason; 01-16-2009 at 01:00 PM.
    Intel Q6600 2.4ghz Quad Core @ 3.2ghz OC
    Xigmatek HDT-S1283 120mm Rifle CPU Cooler
    Corsair 8GB (4 x 2GB) DDR2 800 (PC2 6400)
    Gigabye GA-EP45-UD3P
    Basic Tower Case 3x 80mm Fans (with side vent and cone)
    Lite-ON DVD Burner iHAS220-08
    Western Digital Caviar SE16 500GB WD5000AAKS SATA 3.0Gb/s
    Jaton GeForce 7300GS 256MB 64-bit GDDR2 PCI Express x16
    Cooler Master Real Power Pro RS-650-ACAA-A1 650W ATX Form Factor 12V V2.3

  10. #50

    Default Re: OC Help: 3.58GHz Q6600 & EP45-UD3P

    I'm using a 400mhz FSB and 8x multiplier so I can use 2.0D strap for 800mhz memory frequency. I know my memory is stable at 800mhz, so if I were to encounter a problem, I don't have to suspect the memory as a possible cause.

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