Please report all spam threads, posts and suspicious members. We receive spam notifications and will take immediate action!
Page 1 of 4 123 ... LastLast
Results 1 to 10 of 31

Thread: Phenom 1090T Overclock on 890FXA-UD5




  1. #1
    Join Date
    Apr 2010
    Location
    Spankyville
    Posts
    91

    Default Phenom 1090T Overclock on 890FXA-UD5

    Hey all. For the last week or so I've been trying to overclock and tweak my setup:

    AMD Phenom 1090T
    Gigabyte 890FXA-UD5
    2x4GB G.Skill Ripjaws 1600MHz

    I went up to 3.8GHz or so and Prime was fine. But, during long sessions of Bad Company 2, the graphics would glitch out and the computer would be unstable. A restart would make everything ok until I played Bad Company 2. I decided to download World Community Grid and sure enough, computation failed in under 5 minutes.

    So, I started from scratch, again. I took diligent notes and have gone in small steps. I've seemed to hit another wall though. Here's where I'm at now:

    Speed:
    215MHz x 17 for 3.65GHz CPU
    215MHz x 12 for 2580MHz NB Frequency
    215MHz x 10 for 2150MHz HT Link
    215MHz x 8 for 1720MHz RAM (9-9-9-24-1T, memtest stable although it reports it as 1600MHz no matter what speed I set it to)

    Volts:
    All "normal" (not auto) except RAM which is at 1.65v (that's as high as I want to go, once I top everything else out, I'll lower it).

    This is 100% stable, I can fold all day, I ran OCCT Linpack for an hour and no problems gaming. Now, what I would really like to do is bump up to 220MHz FSB then push the CPU and HT multi as far as they'll go with reasonable volts. I really want to push the NB Frequency because I'm finding that it has a huge impact on memory write speeds as well as L3 cache speed for the CPU. But, with 220, no matter what I try, it won't budge. I've tried pushing up the NB voltage to 1.21, I've tried pushing the HT link up to 1.28v, I pushed the CPU NB VID up +0.050, and I even went 1.45v on the CPU (which I shouldn't really have to do under 4GHz...).

    I looked around for a template on here but I couldn't find one for the 890FXA-UD5. If someone links, I'll happily fill it out for more organized info.

    So, any ideas?
    Last edited by -Spanky-; 03-18-2011 at 02:36 PM.
    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. #2
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

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

    Maybe 1750 is too high for the RAM?
    OCZ suggest 1.35v on the CPU NB usually, try to go up to that?
    How about 240 FSB, CPU x13 or x14, RAM x 6.66, HT x9 and NB x10?

    WDIT: BTW which memtest have you used? memtest86+ 4.2 supports all latest CPUUs and chipsets..
    Having your system spec in your signature wll make it easier for ppl to assist you.
    Last edited by Chike; 03-18-2011 at 09:24 PM.

  3. #3
    Join Date
    Apr 2010
    Location
    Spankyville
    Posts
    91

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

    It could be that 1760MHz is too high of RAM for the memory controller to handle or something. But I've seen people with the 2GHz RAM on Phenom chips. (I kinda regret buying 1600MHz since everyone seemed to say that anything past 1333MHz is pointless on AMD... Morons.)

    1.35v on the CPU NB? Are you sure? I came across a post that said AMD specified a max of 1.2v for it and stock it runs at 1.175v.

    I did used to run 250MHz FSB but that's when I had problems. I have since read that RAM on AMD is better ran with the 1:4 ratio that you achieve with the 8x mutliplier. But in my testing, I'm not showing huge differences either way. Seems like the NB speed has way more affect on memory speed than ratio or CPU FSB does. Do you have any personal experience on this either way? I kinda figure I've gone this far with testing, may as well stay at the 8x multi.

    For memtest, I used 4.2. It said my Phenom is 65nm (the X6 are 45nm) and my RAM runs at 1600MHz. Sometimes when I ran the memory at 1680MHz or so, it reported my RAM as 1333MHz. It always reported timings properly though...

    Added my rig to my sig :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

  4. #4
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

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

    Quote Originally Posted by -Spanky- View Post
    1.35v on the CPU NB? Are you sure? I came across a post that said AMD specified a max of 1.2v for it and stock it runs at 1.175v.
    I have searched for for AMD specs and could not find them.
    That's what OCZ official staff suggest as a standard reply for Phenom II users.
    Support Question Gigabyte GA-890FXA-UD5 Rev. 2.0 with OCZ3G2000LV4GK
    Setting Question OCZ3SOU16004GK + 890FXA-UD5 + 955 BE (C3)


    Quote Originally Posted by -Spanky-
    I did used to run 250MHz FSB but that's when I had problems. I have since read that RAM on AMD is better ran with the 1:4 ratio that you achieve with the 8x mutliplier. But in my testing, I'm not showing huge differences either way. Seems like the NB speed has way more affect on memory speed than ratio or CPU FSB does. Do you have any personal experience on this either way? I kinda figure I've gone this far with testing, may as well stay at the 8x multi.
    Lets put it to the test.
    Try, 213, x17 CPU, x10 HT x10 NB, x6.66 RAM 8-8-8-24-1T 1.65v, and compare with MaxxMEM² - PreView, or other memory benchmark of your choice, to the settings at your OP, and lets see if there is a diference and if it worth the headach if there is.

  5. #5
    Join Date
    Apr 2010
    Location
    Spankyville
    Posts
    91

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

    I still think 1.35 is pretty nuts on the CPU NB VID. I've only been up to 1.225v. Seems like most people keep it under 1.3v. I'll ignore that post I saw where someone claimed 1.2v is max.

    Here's my results from the test. I kept the FSB and multipliers the same, I only changed the memory multi and the memory timings:



    Slightly slower (negligible really) speed with the x6.66 multi. Notice how it affected the L3 cache similar to the RAM speed difference. I'm thinking that's because of the multi change, not because the RAM is actually slower. Looks to me like the NB operates better with a 1:4 ratio. If it was JUST memory speeds, it would only affect the memory, right?

    I still would like to push 220MHz FSB for 1760 RAM. I've seen this RAM go past 1.8GHz and in some cases up to 2GHz. I think I'll pump up the CPU NB VID up along with the NB voltage and try to go to 220MHz.
    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. #6
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

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

    Actually 500MB/s are not so neglectable. But if they are not stable they not realy better.
    If you are pussing theRAM you may need to add voltage or lossen timings.

    Obviousely any benchmark that show a difference for the L3 cache is bogus, or the L3 cache is not a cache. The cache must not be effected by memory speed at all.
    For most applications memory performance are not very important. Optimized applications like games should be effected even less.

    I'd still try the 240FSB wih HT and NB close to their stock frequency and RAM at spec.

  7. #7
    Join Date
    Apr 2010
    Location
    Spankyville
    Posts
    91

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

    Turns out that the L3 cache and IMC are in the northbridge so the northbridge vastly affects both the memory and L3 cache speed. 1600MHz RAM is by far faster than 1760MHz with a faster northbridge. Also turns out (through testing and an hour of googling) that volts up to and even past 1.35v for CPU/NB are accepted and needed for high northbridge speed. I tested it and with 1.35v I broke past that 2700MHz NB barrier and ran Linpack for 30 minutes at 3000MHz. I'm going to tweak and test for stability now but the CPU/NB volts are really needed.
    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. #8
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

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

    Quote Originally Posted by -Spanky- View Post
    Turns out that the L3 cache and IMC are in the northbridge so the northbridge vastly affects both the memory and L3 cache speed.
    Not for a long time.
    Quote Originally Posted by AnandTech
    If the IMC would be on the northbrisge it would be just MC without the I.
    If the L3 cache was in the northbridge it would be the same for all processors

    IDK how CPU/NB voltage is effected by NB frequesncy since they are both connected via HT which has frequency of it's own, but it is effected by the amount of RAM and/or it's frequency/timings.

  9. #9
    Join Date
    Apr 2010
    Location
    Spankyville
    Posts
    91

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

    But...
    XtremeSystems Forums - View Single Post - Difference between NB Voltage and NB VID Voltage?

    I might have read something old about the L3 being IN the northbridge but, the L3 cache's speed is affected by the northbridge's speed. I have benchmarks showing that.

    Now that I look for it, having higher CPU/NB voltage allows for awesome NB frequencies.

    Seems like AMD is harder to find specific info for. I moved from Intel and while there's copious amounts of info for various setups, the individual chips vary a lot in terms of what you can expect in speeds and volts. From my little experience, AMD is the exact opposite. It's too bad I didn't find any info online that explicitly says you NEED to raise it a substantial amount in order to get higher NB speeds, not just a notch or two.

    Half hour in OCCT Linpack and 1.5 hours in World Community Grid so far. CPU/NB volts seems to be doing the trick.
    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

  10. #10
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

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

    Yes I recall back in the days you could add L3 cache, probably near the NB.
    Maybe the CPU/NB(uncore?) use the same clock as NB.
    At least 1.35v looks "safe" if OCZ recommends it.
    OC as in your signature or has it changed?

Page 1 of 4 123 ... LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •