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Thread: Phenom 1090T Overclock on 890FXA-UD5




  1. #11
    Join Date
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    Yea, 1.35v seems safe. Even up to 1.45 or so but that's really pushing it. I guess I had a difficult time with this because at 2600MHz NB it took 1.175v and to get past 2700MHz I need over 1.25v (1.25v failed, I'm running 1.35v now so it might go lower). Seems like a pretty big hump to get over that's not really documented anywhere or maybe I just have a funky board.

    I ran 3020MHz NB all night with 1.35v. All the WCG results returned so far are valid. RAM was at 1611 and CPU at 3220. I'm going to bump up the NB multi 1 more notch and see what happens. I'm very pleased with the RAM performance at 3GHz NB.

    I finally see now how people say that RAM above 1333MHz doesn't do much on AMD systems. Those people probably never pushed the NB and thus never got the full performance out of their RAM. I mean, we're talking a difference of roughly 2000MB/s difference on memory write speeds when comparing stock and OC NB. Even more for read and copy.

    I'll update my signature when I have a more final overclock. Right now, I'm just pushing the NB with most everything else at stock. Even though I doubted you at first, thanks for opening my mind about the CPU/NB volts.
    A site I've made from scratch:


    Computer Specs:
    AMD Phenom II x6 1090T @ 3.655GHz (215x17) (stock volts)
    Gigabyte 890FXA-UD5 (NB @ 2.58GHz, HT @ 2.15GHz) (stock volts)
    G.Skill RipJaws F3-12800CL9D-8GBRL @ 1.72GHz 9-9-9-24-1T 1.65v
    EVGA GTX 275, 2x250GB SATA RAID0, Corsair AX850
    TRUE w/Delta 120x38mm

  2. #12
    Chike is offline Senior Member
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    It is a good thing to doubt, I might be wrong, better be safe than sorry.
    It is typical for all CPUs with IMC to need more voltage on that portion wether it's CPU/NB or QPI/VTT with large amounts of memory and/or hi-speed memory, just like the NB did when the MC was built into it.
    My system isn't stable with the 4GB at 1066 without +0.14v on the NB even at 333MHz FSB.

  3. #13
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    Just a small update (I will post more finalized settings later), I'm currently running stable:
    CPU 3.8GHz @ 1.45v
    HT 2.4GHz @ stock volts
    NB 3GHz @ 1.375v (CPU/NB) 1.25v (NB)
    RAM 1.6GHz 9-9-9-24-1T @ 1.52v

    I ran WCG for the last 16 hours or so, everything that's been returned is valid. Also passed 1 hour of OCCT Linpack. From here, I'm going to push for 4GHz CPU and tighten the RAM down.
    A site I've made from scratch:


    Computer Specs:
    AMD Phenom II x6 1090T @ 3.655GHz (215x17) (stock volts)
    Gigabyte 890FXA-UD5 (NB @ 2.58GHz, HT @ 2.15GHz) (stock volts)
    G.Skill RipJaws F3-12800CL9D-8GBRL @ 1.72GHz 9-9-9-24-1T 1.65v
    EVGA GTX 275, 2x250GB SATA RAID0, Corsair AX850
    TRUE w/Delta 120x38mm

  4. #14
    Chike is offline Senior Member
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    The RAM ran so maybe you'd be able to use CAS 8 with more voltage.
    RAM is like a box of chocolate, you never know what you get, sometimes they put higer bined chips in the cheaper mdels if they don't have others.

  5. #15
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    Yea, I think I've done 8-9-8 before. I really pushed for 7-8-7 but it locked up pretty quick, maybe 7-9-7 is the key or something. Plenty more performance to come with final tweaking :P
    A site I've made from scratch:


    Computer Specs:
    AMD Phenom II x6 1090T @ 3.655GHz (215x17) (stock volts)
    Gigabyte 890FXA-UD5 (NB @ 2.58GHz, HT @ 2.15GHz) (stock volts)
    G.Skill RipJaws F3-12800CL9D-8GBRL @ 1.72GHz 9-9-9-24-1T 1.65v
    EVGA GTX 275, 2x250GB SATA RAID0, Corsair AX850
    TRUE w/Delta 120x38mm

  6. #16
    Chike is offline Senior Member
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    Israel
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    Actually I doubt any meanigful performance gain in real-life benchmarks from such tweaks.
    The major gain(5, maybe 7 percent) would come from what you already done, other than CPU frequency I mean.
    But yes I know it make you feel good you have done the best possible :)

  7. #17
    Join Date
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    :) I meant my final push to 4GHz and any other MHz I can squeeze out including memory timings. I just tried 200x20 for 4GHz with 1.475v and it didn't take. I'm backing off on the NB MHz to try and see if I can trade MHz there. I really don't want to go past 1.45v on the CPU and 1.375v on the CPU/NB. We'll see...
    A site I've made from scratch:


    Computer Specs:
    AMD Phenom II x6 1090T @ 3.655GHz (215x17) (stock volts)
    Gigabyte 890FXA-UD5 (NB @ 2.58GHz, HT @ 2.15GHz) (stock volts)
    G.Skill RipJaws F3-12800CL9D-8GBRL @ 1.72GHz 9-9-9-24-1T 1.65v
    EVGA GTX 275, 2x250GB SATA RAID0, Corsair AX850
    TRUE w/Delta 120x38mm

  8. #18
    Join Date
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    Spankyville
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    Well, I think I've landed at a satisfactory overclock with comfy volts.

    3.87GHz CPU (215x18) 1.45v
    3.01GHz NB (215x14) 1.375v CPU/NB 1.21v NB
    1.72GHz Memory (215x8) 1.65v 9-9-9-24

    I'm currently testing 8-9-8-24 on the memory. I should be able to drop the memory volts a little bit and maybe go down to 1.425v on the CPU. I know the CPU/NB won't budge but that's the price to pay for a high northbridge clock. I'm extremely happy with the memory performance over stock speeds:


    vs stock:
    A site I've made from scratch:


    Computer Specs:
    AMD Phenom II x6 1090T @ 3.655GHz (215x17) (stock volts)
    Gigabyte 890FXA-UD5 (NB @ 2.58GHz, HT @ 2.15GHz) (stock volts)
    G.Skill RipJaws F3-12800CL9D-8GBRL @ 1.72GHz 9-9-9-24-1T 1.65v
    EVGA GTX 275, 2x250GB SATA RAID0, Corsair AX850
    TRUE w/Delta 120x38mm

  9. #19
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    Seems you got lucky with the memory.
    Is this board compatible with the upcoming bulldozer CPUs?

  10. #20
    Join Date
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    Default Re: Phenom 1090T Overclock on 890FXA-UD5

    Quote Originally Posted by Chike View Post
    Is this board compatible with the upcoming bulldozer CPUs?
    While my board was in shipment, Gigabyte updated their site with the revision 3 board, the one that uses the AM3+ socket. I probably got the last of the revision 2.1 boards. I didn't know what the 3rd revision was until a week or so ago when I was reading the article about them being released in Japan. I did some serious facepalming. I guess on the bright side, if I ever have issues and need to RMA, I'll probably get a rev 3.0 or 3.1 :)

    Memory looks solid at 1.72GHz and 8-9-8-24-1T. Time to go further :P
    A site I've made from scratch:


    Computer Specs:
    AMD Phenom II x6 1090T @ 3.655GHz (215x17) (stock volts)
    Gigabyte 890FXA-UD5 (NB @ 2.58GHz, HT @ 2.15GHz) (stock volts)
    G.Skill RipJaws F3-12800CL9D-8GBRL @ 1.72GHz 9-9-9-24-1T 1.65v
    EVGA GTX 275, 2x250GB SATA RAID0, Corsair AX850
    TRUE w/Delta 120x38mm

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