[HELP!!]Problem with my hd6790 and ddr2 ram 3gb

I have buy PWC HD6790 ,2 month ago upgrade from 9600gt

and i have test a game just SR3 at max setting 1600*900 no aa dx11, why i get fps 16-28 ??

in splinter cell conviction i get a very low fps in large area just 14-31 use max setting no aa 1600*900

and then i see this http://www.youtube.com/watch?v=EpIbJp-MzA0 this guy played SR3 at 1920*1080 res

in high setting and 4aa but why he can get fps more than me ??

i try to install a new windows like 4 times. clean uninstall driver using driver sweeper but nothing have change.

this is my spec:

psu: Power monster 650w
mb: GA-M61PME-S2P
cpu: AMD phenom ii x4 945
ram: DDR2 3gb \\\ddr2 1gb bus667 and ddr2 2gb bus 800
gpu: PWC HD6790 1GB 256BIT DDR5
hdd: WD 320 GB

i think my problem is DDR2 3g ram. should i just upgrade it to DDR3 4gb ??

thank you.

sorry for my english.

any suggestion?
16 answers Last reply
More about help problem hd6790 ddr2
  1. You can't upgrade to DDR3 without upgrading the mobo because it only supports DDR2.


    Your CPU is not at full capability according to that page.
  2. ^
    um sorry

    I can buy a new mobo and DDR3 4gb

    but this time i want to know what's going on with my rig.

    why i get a low fps in game and the other game?

    that what i ask.

    my problem is RAM and MOBO right?

    thank you for fast reply.

    sorry for my eng.
  3. help me please!!
  4. bump
  5. bump

    any suggestion?
  6. bumpp,,,
  7. DON'T Bump

    How is your memory configured. To properly run in daul channel mode the memory is required to be the same.
    If you are running one memory module (1 gig) and a second Memory module (2 gigs), 2 things -
    1) the speed will be the slower of the two, and
    2) YOU are running in single channel mode, NOT daul channel. Single channel is MUCH slower.

    You can down load CPU-z (google it). install and run.
    Look at the top. click on memory tab and look to see if single channel or daul channel mode.
    The SPD tab shows what the memory is capable of running at.
  8. ^
    Oh sorry
    I just look at it
    It run in dual channel mode.

    What am i gonna do next?
  9. gary1 said:
    You can't upgrade to DDR3 without upgrading the mobo because it only supports DDR2.


    Your CPU is not at full capability according to that page.

    (Note) If you install AMD AM3/ AM2+ CPU on AM2 motherboard, the system bus speed will downgrade from HT3.0 (5200MT/s) to HT1.0 (2000 MT/s) spec; however, the frequency of AM3/ AM2+ CPU will not be impacted. Please refer "CPU Support List" for more information.

    i readd this from gary1 post thank you

    i think this cause a low fpw in a game right?

    any suggestion?

    thank you
  10. How did you verify You are in daul channel mode, did you run cpuid CPU-z?
    When you run it click on Memory tab at top. That will show you what the ram is running at and if in sngle/daul mode.
    Not an expert on amd chipsets, But with INTEL, you can not run in daul channel mode with two different sized modules.
    ..DDR means that data will be transfered on both the leading edge and the lagging edge. This is NO problem.
    ..The 2 means that the memory will operate in parallel mode. Halve of the 2 gig model does NOT have a corresponding parallel memory in the 1 gig module so can not be in daul mode.
  11. ^


    idk what's going on

    the problem is my MOBO right??

    it not full capability to support my cpu right??

    sorry for english

    thank you
  12. ^ unable to open link - I'm @ work and that site is on the BLOCKED list.

    As to MB support for your Proc. Did you go to Gigabytes support website.
    Compare the BIOS version to yours and if newer than yours then update the bios.
    You can also look at CPU support list.
  13. ^

    Uploaded with ImageShack.us

    yeah i just update bios after i bought hd6790
  14. As I stated earlier, I'm Intel so maybe some one that is more up on AMD can pipe in.
    It appears that the way memory (daul channel) is employed is different between the two.

    You are runing single channel (You show "unganged" (this is a AMD thingy). So Channel # is MISLEADING and probably just showing what is available.

    .. Ganged = dual channel mode for ram. All cores get access to 100% of the ram.
    ...Unganged = single channel. Each core gets access to a stick of ram.
    End quote.

    It also shows that your DDR2-800 is running at the slower speed of 667 (2 xs 335)

    For an Intel system,
    .. The DC Mode is "greyed" out and and Channel # IS what you are operating at.

    Bottom line, just Buy one 2 gig ram module Identical to the 2 gig module you already have and replace the 1 gig module with new.
  15. ^
    thank you for reply RetiredChief

    So i'll going to buy a new MOBO and DDR3 ram it'll be better that this..

    thank you again for answer my question
  16. Your welcome, And ENJOY your new MB & Ram
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