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Thread: Athlon 939 4000+ Overclock

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    Athlon 939 4000+ Overclock

    Hey guys,

    I've just built a new PC with an Athlon 64 4000+ on an ASUS A8N SLi (not deluxe or premium). I've overclocked my 7800GTX fine, but I would like to get an extra 200mhz out of my CPU.

    I've overclocked a P4 3.0ghz before to 3.4ghz on an Abit IC7G, but that was a peice of cake, just upping the FSB until it crashed, then lowering it again to find a stable speed.

    Athlon boards / CPUs are completely new to me, I don't know how this HyperTransport works, I've also lost touch with memory timings and how they play a part in your overclock. I have Corsair XMS PC3200 C2 in 1gb TwinX factor by the way.

    To help the guys who know, this page has screens of the BIOS interface on the A8N SLi Premium, it's exactly the same on the normal A8N which I have.

    Is there any links, guides and tutorials to overclocking an Athlon 64 with a locked multiplier?

    I can't seem to find anything about this on the net

    Thanks chaps!
    Last edited by leachy86; 22-08-2005 at 01:16 PM.

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    Athlon 64 4000+ .... do you really need to overclock it?
    Sex, breakfast of champions

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    Quote Originally Posted by Fatboy
    Athlon 64 4000+ .... do you really need to overclock it?
    Of course he does!

    Silly question

    Anyway from what i can work out so far:

    Hypertransport speed = FSB x Hypertransport Multiplier
    e.g. 200mhz (FSB) x 4 = 800mhz

    Cpu Speed = FSB x CPU Multiplier (as per usual)

    In addition it appears you can lock the PCI bus at 33mhz (good idea) to prevent that running at an odd speed and there's some kind of 'memory divider' which governs how fast the memory runs. I'm asking questions about this atm but i *think* this is the 'maximum memory clock' setting which is usually 'DDR400'. I can't find a 'divider' setting specifically.

    I'm trying to go for 2.4ghz on my system and i reckon the right settings are:

    CPU Speed = 240mhz (FSB) x 10 = 2400mhz (2.4ghz)
    RAM speed = 'DDR333' = ~400mhz
    Hypertransport Speed = 240 x 4 = ~960mhz (or more likely locks to 1000mhz)

    ...but i need to play tonight to find out.
    System 001: Maximus VII Formula, 4790k i7, RTX 2080ti FE (incoming), 16GIG Corsair Vengence DDR3 RAM CL9, Corsair HX1000, ROG SWIFT PG278Q , SSDs, Antec 1200 case, All watercooled. [main]
    System 002: A8 3850 APU, ASUS uATX FM1A75 MB, 4GB Corsair Vengeance DDR3, Corsair psu, OCZ Agility 3, 1TB F3, Dell 2001FP 20" LCD, £7's worth of 5.1 speakers (they rock) Windows 7 x64[wife/server]
    System 003: AsRock MB, APU, 8 GIG Corsair, Silverstone HTPC case, stock cooler, GT220 1gbDDR3, WD Green 3TB, Kingston 40gb SSD, MCE Remote, Panasonic 50" LCD (87BDX) via HDMI Windows 8.1.1 (32) [media centre]
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    Lovely chap dangel's Avatar
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    Thanks for that dangel.

    However I'm still in the wilderness like you, my old Abit IC7G had a divider property in the BIOS and I knew how to use the 1:1 and 4:3 ratios, I could only overclock my P4 3.0ghz to 235mhz in 1:1, then I had to change to 3:4 and then I could keep going upwards.

    Overclocking this 4000+ to 2.6ghz effectively makes it in to a stock FX-55, just without an unlocked multiplier, i think... Nice

    Need advice though, come on tech heads where are you?

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    not posting kempez's Avatar
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    Check my project <<| Black3D |>>
    Quote Originally Posted by hexah
    Games are developed by teams of talented people and sometimes electronic arts

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    1st step; bump FSB to 220.
    2nd step; run prime95 stress. Bump FSB in windows by 3-5MHZ at a time till you get errors (wait a few mins at each new setting). When you do roll back 5-8 MHz.

    3rd step; set that FSB in bios and test everything. Twice.

    Thats the easy way

    ps.If you want to check your CPU ceiling, set a memory divider to 1:2 or something silly and do the above.

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    Thanking you greatly kempez815, great guides!

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    Quote Originally Posted by leachy86
    Thanking you greatly kempez815, great guides!
    No problems mate. Report back with some results. A couple of peeps on rubbishrubbishrubbishrubbishrubbishrubbishrubbishrubbishrubbish.com have got to 3GHz on air
    Check my project <<| Black3D |>>
    Quote Originally Posted by hexah
    Games are developed by teams of talented people and sometimes electronic arts

  10. #10
    Lovely chap dangel's Avatar
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    Meh i found a great guide specifically for the AN8

    http://www.ocforums.com/showthread.php?t=364790

    Enjoy!

    And yes it does appear that 'max memory clock' is actually the divider!
    System 001: Maximus VII Formula, 4790k i7, RTX 2080ti FE (incoming), 16GIG Corsair Vengence DDR3 RAM CL9, Corsair HX1000, ROG SWIFT PG278Q , SSDs, Antec 1200 case, All watercooled. [main]
    System 002: A8 3850 APU, ASUS uATX FM1A75 MB, 4GB Corsair Vengeance DDR3, Corsair psu, OCZ Agility 3, 1TB F3, Dell 2001FP 20" LCD, £7's worth of 5.1 speakers (they rock) Windows 7 x64[wife/server]
    System 003: AsRock MB, APU, 8 GIG Corsair, Silverstone HTPC case, stock cooler, GT220 1gbDDR3, WD Green 3TB, Kingston 40gb SSD, MCE Remote, Panasonic 50" LCD (87BDX) via HDMI Windows 8.1.1 (32) [media centre]
    System 004: Asus UL50AT Intel Core 2 Duo,4GB, Intel Gen 2 80GB SSD, Win 8.1.1 x64 [no justification]
    System 005: HP Proliant N40L Microserver, 4x2TB drives, fan mod, Pico PSU mod, Win7 x86 [file server]
    System 006: Dell Optiplex 9010, i7, 8gb, 128gb Samsung 830 x 2 (boot and VM drive), 1TB WD HDD, ATI something, Windows 8.1.1 x64 RTM [work]


  11. #11
    not posting kempez's Avatar
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    hehe - I couldn't be bothered to google it - just knew those guides were very good
    Check my project <<| Black3D |>>
    Quote Originally Posted by hexah
    Games are developed by teams of talented people and sometimes electronic arts

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