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Thread: **Official DFI LanParty UT 790FX-M2R Review/Overclock/Guide Thread**

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  1. #11
    Xtreme Mentor
    Join Date
    May 2007
    Posts
    2,792
    You're doing good so far, tweaking and working with Phenom is difficult and very time consuming. The biggest problem is each BIOS and MB itself has so many problems and shortages, so you can't really figure out exactly what's stopping you. There are way too many BIOS bugs yet.

    I just cross-checked your NB HT voltage, you're running it below spec and you're running the NB core voltage above spec.

    IDK what RAM MHz you've chosen, but I'm sure you know to keep low clocks well within stable range on this platform -> Intel platform stable specs are not usually the same on these due to the IMC vs. MCH. So you can play with DS settings accordingly. You can use SPDTool to check out the rated DS and work up from that. Keep 195ns on both tRFC if you have two DIMMs installed and DCT Mode to Ganged (until you find your limit).

    With Phenom, put your CPU NB voltage up to 1.300V when you're past 1.8GHz but below 2.3GHz (well within safe limits). K8 used to run both voltages and speeds in-sync but K10h doesn't and lets you manually control them. It'll let things span out more consistent.

    Set the NB Core voltage to 1.1V as it's rated. You won't need to touch that.

    Try setting NB HT voltage to 1.225V and leave tRTP to 3-5. I think you have two options, one of 2-4 and one of 3-5. High HT ref. clocks tend to need this setting high for some reason, mainly because of the bootup calculations Phenom runs. They're the ones which typically give you no POST or a failed overclock, if they're too low compared to what they should be.

    See if that helps. You can also drop all three FIDs (CPU/NB/HT) lower to check out if you can oc on HT ref. more.

    Quote Originally Posted by 3oh6 View Post
    yeah i have to set initial boot to 250HTT and then 281HTT otherwise i won't get post, again, this is the same for all three processors. setting 282HTT just hangs at 25 during POST. i see everyone else running around with 350HTT+ without issue on this board with non-Phenoms but my 3200+ i have laying around shows the same symptoms. i would have accepted the Phenoms being limited there but not the 3200+

    i have tried setting both to 195+ with no change in symptoms. thanks for the help though, i am stumped as to what is going on.
    Last edited by KTE; 02-19-2008 at 09:57 AM.

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