need help OC 3800+ Manchester

Hello Hello.

I've had my 3800+ for quite a while now and I think it's time to overclock. But i just can't get it to boot past 2.05GHz. Sad.

I did a search in this forum and found some very helpful threads on overclocking the 3800+, but I think the settings in my BIOS are strange.

Hopefully someone can help!

AMD Athlon 64 X2 3800+ Manchester socket 939
Stepping E4

MSI K8N Diamond Plus
bios version: 1.0 ? date 12/14/05

2x 1GB OCZ DDR400 Platinum
stock timings: 2-3-2-5

Now, i took advice from another thread which says to set the CPU:MEM ratio to 5:4. Well this is where my motherboard confuses me. It shows DRAM/FSB options of { 1/2, 2/3, 5/6, 1/1 }.
Here's a list of the overclock options in BIOS...

FSB: 200 - 450 MHz
Multi: x5 to x20
Volt: 1.4v - .8v
extra cpu voltage: +/- .05 or something
Memclock: DRAM/FSB: 1/2, 2/3, 5/6, 1/1
DDR volt: 2.6v - 3.2v
Mem MCT timings: (CL, TRC, etc.....)

PCIe freq (100 - 148 MHz) (no option to 'lock' it)
PCIe V: 1.5v - 1.85v
HT C51D config: (configures the speeds between the CPU, the NB and the SB)
Spread Spectrum: SATA and PCIe: Enabled/Disabled
Spread Spectrum: CPU and HT: Disabled, Center, Down Spread

These are all the options available in the Core Adjustments section.

Hopefully someone can help with some setting to start with and hopefully move up to 2.4 or more.
6 answers Last reply
More about need 3800 manchester
  1. first thing you should do is loosen your timings on your memory - I have the same type of memory and my board won't post with such tight memory settings with even the mildest over clock. Try setting your timings to 2.5, 3, 2, 7 - you should be able to get up to 230 mhz prime stable.

    Use your memory divider and try using this utility to set your oc,

    Keep your HTT Bus Speed between 1000 and 800

    Keep your ram speed below 230 using dividers

    this is just a quick way - if you want to try to do a good oc you really should follow a guide that will show you how to test each of your component capabilities - max ram speed, max HTT - max clock speed of cpu.
  2. thanks a lot!!

    i'll give your suggestions a try and let you know the results.
  3. ok, i'm trying to apply your suggestions, but my mobo's BIOS has settings in a different "language" than just CPU HTT settings, etc...

    it says:
    adjust cpu freq (mhz): [200-450]
    cpu freq config: multiplier: [5x - 20x]
    cpu voltage settings
    then it has DDR frequency timings and the
    memclock ratio: [1/2, 2/3, 5/6, 1/1]

    there is no adjustment for HTT frequency, etc...

    advice? suggestions?
  4. this is the main "Cell Menu" screen.
    the highlighted red option "HT config" sends you to the screen in the second image.

    You can see the max and min's of each setting by what is included in my first post.

    i tried setting the multi to 5x and the cpu freq to 400 MHz and the DRAM ratio to 1/2, it was able to boot, and I thought that would equal 2000 MHz but it says 608 MHz after boot. Ha. I changed the DRAM ratio to 2/3 and to 5/6, both booted to DDR 532 and DDR 666, respectively.
    I tried all these settings and just uping the cpu freq to 450 and it wouldn't boot.

    Take a look at the way my BIOS is set up and let me know if your suggestions change knowing this:

  5. update:

    got to windows running at 2.5GHz with 125MHz memory (DDR-250)

    10x cpu multi, 250MHz, Memory @ 1/2 ratio w/ 3-3-3-8 2T.

    i tried 260MHz but wouldn't stay alive too long.
    Going to try to go back in and raise the RAM ratio up.


    update. memory is up to 208.3 MHz @ 5/6 ratio and 2.5-3-3-5 1T.
    cpu still at 10x and 250MHz.

    going to see how stable she is. dual Prime95 and is there a mem test i should use?
  6. Use Memtest86 to test RAM stability.
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