*Official* Alienware M18xR1/R2 CPU Overclocking Thread - Learn How and Share Tips Here

Discussion in 'Alienware 18 and M18x' started by BatBoy, May 14, 2011.

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  1. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist

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    I run my M18xR2 with 3920XM at 4.3GHz 24/7. On air and max fans, I can bench it at 4.5GHz with Liquid Ultra with no thermal issues, and using AC cooling up to 4.8GHz benching with either IC Diamond or Liquid Ultra.
     
  2. 2002_Viper_GTS_ACR

    2002_Viper_GTS_ACR Notebook Evangelist

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    Hi Guys,

    Please excuse me if I am not following protocol, but is there a recommended Place to start with doing some mild OC'ing of my 3940xm that I got in last week? I plan on installing it over the next few days, and I know overclocking it is going to produce better results then my current 3820qm, but I am not looking to do bleeding edge OC'ing, but something good and yet still reliable.

    I have 680m SLI, and soon 3940xm, and very likely have an older BIOS, as I havent updated it in at-least 2 years. Which Bios version should I use, and any 'starter' settings for s 3940?

    Thanks and again, appologies if I was supposed to read all 194 pages before posting ;)

    I have an Alienware m18x R2

    Jon
     
  3. 4h4h270

    4h4h270 Notebook Enthusiast

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    How many TDP & Volts when 3920xm@4.3/4.5/4.8GHz?
    I current using 2920xm. Because of the high TDP, it can only reach 4.3GHz for any high cpu use software.
     
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  4. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist

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    For 4.3GHz on 2920XM or 3920XM a Flex VID of 10 should be plenty. Long and short turbo power limits of 99 up to 125 each will be plenty, and Pri Plane of 960 (120.000A in XTU) should be ample for 4.3GHz on all cores for 3920XM. You want around 2400 for Pri Plane with 2920XM.

    What is your system doing? Is it throttling? If so, changing voltage won't help that.

    Try the settings shown in the 3 images I added to post #1 a long time ago. Those thumbnails are for 2920XM.
     
  5. 4h4h270

    4h4h270 Notebook Enthusiast

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    I'm ok with my system now :D. Just think about to upgrade to 3920xm.
    My best record with 2920xm is running x264@4.3GHz for 30h not thermal issue. Not sure if 3920xm can do better. That's why I asked how many TDP with 3920xm@4.3GHz. May be 3920xm can do same@4.5GHz.
     
  6. 4h4h270

    4h4h270 Notebook Enthusiast

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    I've never tried to use liquid pro/ultra/copper, which one suit best for mobile cpu oc?
     
  7. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist

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    Use Coollaboratory Liquid Ultra, Phobya Liquid Metal or Thermal Grizzly Conductonaut. They're all basically the same thing, and they perform more or less the same.
     
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  8. sazistas

    sazistas Notebook Consultant

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    Can anyone please help with the overclock of my 3920xm? I get very high temperatures (100c) even with the level 1 preset. I have the three pipe heatsink and I did a repaste with prolimatec pk-3...With a complete stock cpu (overclock disabled) I get up to 90c. Is my cpu faulty? I think it's an ES version, I bought it from eBay for about 300 euros
     
  9. kenny27

    kenny27 Notebook Deity

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    What is your room/ambient temperature and is the center cpu fan spinning at full speed when under load?
     
  10. Mr. Fox

    Mr. Fox BGA Filth-Hating Elitist

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    Get a better thermal paste and check your heat sink closely to make sure it is fitting correctly... As brother @kenny27 suggested, be sure the fans are going full blast. At those temps they should be howling away at max speed.

    Go with Liquid Ultra if you want good overclocked temps. Anything other than a liquid metal is grossly inferior. Liquid Ultra, Phobya Liquid Metal and Thermal Grizzly Conductonaut are the only thermal pastes I will consider using on my CPUs any more. The exception is if the heat sink is warped or has a sloppy fit. It that's the case, you need to use something super thick like IC Diamond to plug the gap until you can fit that.
     
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