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Thread: Overclocking an FX-55 with water




  1. #1
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    Default Overclocking an FX-55 with water

    Right now I'm just trying to find my limit on the this processor in my system. It's an FX-55 (San Diego) on a DFI NF4 Ultra D board. It's watercooled with swiftech parts. I think I recall getting it Prime95 stable at 2.95 GHz once but now that I'm attempting it again it doesn't seem to be working very well.

    Here's what I've done.

    Locked Multi at 13x
    Locked FSB/LDT ratio at 3x (to prevent as possible cause of error)
    Locked FSB/DRAM ratio at 1/02 (100 mhz) (to prevent as possible cause of error)

    With these settings I test various voltages and HTTs.

    1.62v at 228 (2964) failed in 2 minutes
    1.62v at 227 (2951) failed in 2 hours 5 minutes
    1.6v at 227 (2964) failed in 7 minutes
    1.62v at 226 (2938) failed in 0 minutes

    These results are really confusing me. If anyone has had any experience overlclocking an FX-55 San Diego, please share your results. Or if anyone has any tips or insight, I'd appreciate that too.

  2. #2
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    Default Re: Overclocking an FX-55 with water

    I personally can't help you out with any advice, but I can give you some direction. In case you haven't already done so, check out the following sites:

    www.dfi-street.com (DFI tech support forum...LOADS of technical know how)
    www.extremeoverclocking.com

    Those two sites are very helpful to the overclocker.

  3. #3
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    Default Re: Overclocking an FX-55 with water

    How much voltage does the RAM have? What wattage is that power supply?

  4. #4
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    Default Re: Overclocking an FX-55 with water

    The ram is at 2.6v. The power supply is 510 Watts.

    Also, there are a few options for the torture test in Prime95. I've been running the default one (blend). Is that the one I should be running?
    Last edited by Bobby74213; 12-16-2005 at 09:28 PM.

  5. #5
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    Default Re: Overclocking an FX-55 with water

    I just ran Prime95 at all stock settings and it failed in less than a minute. Then I ran it again and it failed in 14 minutes. Does this mean there's something wrong with the hardware? I did a quick run through all the tests in memtest and it passed, no problem. I'm going to do some more extensive testing on it in a bit though.

  6. #6
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    Default Re: Overclocking an FX-55 with water

    That RAM won't be stable at 2.6V regardless of what speeds you have it on. VX is notorious for needing lots of voltage just to run at stock. Try at least 2.8v and then run memtest. It's in my signature. Don't ever waste time in Prime 95 until memtest has cleared your RAM.

  7. #7
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    Default Re: Overclocking an FX-55 with water

    k. good thinking. I'll try that. But what do you mean pass memtest. I ran through all ten of their tests and it passed but it was just once through. I've heard you usually want to run test #5 a few times then run through the whole thing.

  8. #8
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    Default Re: Overclocking an FX-55 with water

    I'm really starting to wonder about this board... This is the second Lanparty I've owned and the first one found its way to the dumpster pretty quick.

    With default settings (or even if I up the voltage to 2.9 on the RAM) it doesn't always boot. If I pull one powercord out of anything, say a cd-rom drive, or change one jumper, it hangs at detecting drives. I have to clear CMOS and powercycle it a few times til it comes back. It doesn't recognize my USB keyboard or mouse quite often and it won't give me the option to up my voltage past 3.2v even though I've changed the jumper.

    I really haven't done much to this board. I let everything run stock for about 3 months and now that I try overclocking it I find I can't even make it to an hour in prime95 with stock settings.

    Is it even worth troubleshooting at this point. Because it doesn't seem like a problem that's going to go away.

  9. #9
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    Default Re: Overclocking an FX-55 with water

    Hard to say, but it looks like you could just be really unlucky. Might be time for another RMA...

  10. #10
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    Default Re: Overclocking an FX-55 with water

    Every DFI board I have ever had has given me trouble. That is not to say it wasn't user error also. Those boards are very tought to set up. I suggest going on OCZ's web site for some guidance.

    What bios are you running? That is the single most problematic area with DFI boards. On the OCZ site, they have what is considered the best bios for that board and VX ram. I would suggest a bios flash before you give up on that board.

    As for running VX at low voltages, I have had 3 sets and they all ran flawless @ 2.6V @ 2.5-3-3-7-T1. I also did extensive testing @ 2.85V and all 3 sets ran perfect @ 2-3-3-6-T1. Any tighter at all, 3.3V or more is needed. Don't forget to cool that ram at any Vdimm higher than 2.9V.

    As for memtest, it needs to run error free for at least 12 hours before it can be considered stable. 24Hrs is considered 100% stable if it is error free. Prime stresses the entire system and needs to run the same times for a true test of stability. You most certainly have an issue. I would get a newer bios, then test each piece exactly the way you have been. You are using a great test method and if it just won't get stable, time to isolate. I cannot recommend enough to go to the OCZ Warranty support forum and make a post there. Do some searches too. They have done extensive testing with DFI boards and VX ram. Good luck.
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