A7V8X RAM/CPU speed problem

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

I have an Asus A7V8X m/b with 256 MB of PC3200 DDR RAM. I have bought
a new processor - an XP 2800+, which runs at FSB of 333 MHz.
However....when you set the processor speed to the correct speed of
2.083 GHz in the bios, I have discovered that the memory is running at
333MHz also, not at 400 MHz (using Sisoft sandra software).
Furthermore, if you set the CPU speed to "manual" and you then set the
external frequency to 166/33, then in the memory speed box, you only
have Auto and 333 available, not 400. How can I set the memory to run
at the correct 400MHz and have the FSB running at 333MHz at the same
time? Anyone else have this problem? Many thanks in anticipation.

John
6 answers Last reply
More about a7v8x speed problem
  1. Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

    "John Simon" <Johnsimon@nowhere.net> wrote in message
    news:s5uq70t2im7p7ohlm5qnms0o5l8u4ai3ta@4ax.com...
    > I have an Asus A7V8X m/b with 256 MB of PC3200 DDR RAM. I have bought
    > a new processor - an XP 2800+, which runs at FSB of 333 MHz.
    > However....when you set the processor speed to the correct speed of
    > 2.083 GHz in the bios, I have discovered that the memory is running at
    > 333MHz also, not at 400 MHz (using Sisoft sandra software).
    > Furthermore, if you set the CPU speed to "manual" and you then set the
    > external frequency to 166/33, then in the memory speed box, you only
    > have Auto and 333 available, not 400. How can I set the memory to run
    > at the correct 400MHz and have the FSB running at 333MHz at the same
    > time? Anyone else have this problem? Many thanks in anticipation.
    >
    > John
    >


    John,

    I had several long threads going awhile ago when I had just gotten the
    A7V8X-X. Do a search on Google Groups for "a7v8x-x memory speed".

    From what I could tell, the A7V8X-X BIOS must have some kind of algorithm
    for determining what speeds it allows you to select for Memory Speed.

    I was eventually able to "trick" the BIOS into display "200" (see one of
    those threads), but I never was able to really figure out what the BIOS was
    doing. Basically, what I had to do was manually change to various
    Frequency/PCI combinations, which would lower the lower number on the Memory
    Speed. Eventually, the BIOS would start showing "200" in my case.

    Sorry if this isn't very helpful...

    Jim
  2. Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

    On Wed, 14 Apr 2004 14:05:26 -0400, "ohaya"
    <ohaya_NO_SPAM@NO_SPAM_cox.net> wrote:

    >
    >"John Simon" <Johnsimon@nowhere.net> wrote in message
    >news:s5uq70t2im7p7ohlm5qnms0o5l8u4ai3ta@4ax.com...
    >> I have an Asus A7V8X m/b with 256 MB of PC3200 DDR RAM. I have bought
    >> a new processor - an XP 2800+, which runs at FSB of 333 MHz.
    >> However....when you set the processor speed to the correct speed of
    >> 2.083 GHz in the bios, I have discovered that the memory is running at
    >> 333MHz also, not at 400 MHz (using Sisoft sandra software).
    >> Furthermore, if you set the CPU speed to "manual" and you then set the
    >> external frequency to 166/33, then in the memory speed box, you only
    >> have Auto and 333 available, not 400. How can I set the memory to run
    >> at the correct 400MHz and have the FSB running at 333MHz at the same
    >> time? Anyone else have this problem? Many thanks in anticipation.
    >>
    >> John
    >>
    >
    >
    >John,
    >
    >I had several long threads going awhile ago when I had just gotten the
    >A7V8X-X. Do a search on Google Groups for "a7v8x-x memory speed".
    >
    >From what I could tell, the A7V8X-X BIOS must have some kind of algorithm
    >for determining what speeds it allows you to select for Memory Speed.
    >
    >I was eventually able to "trick" the BIOS into display "200" (see one of
    >those threads), but I never was able to really figure out what the BIOS was
    >doing. Basically, what I had to do was manually change to various
    >Frequency/PCI combinations, which would lower the lower number on the Memory
    >Speed. Eventually, the BIOS would start showing "200" in my case.
    >
    >Sorry if this isn't very helpful...
    >
    >Jim
    >
    Many thanks. I found your original question on 7/03/04 in this group,
    so will read all the threads.

    My problem is a little different as in your case you were trying to go
    down to 200, and I need to go up to 400. If I have no joy, I will buy
    some new PC2700 memory instead, as I haven't even received the 512MB
    of PC3200 memory I bought from crucial yesterday.
  3. Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

    John Simon wrote:
    > On Wed, 14 Apr 2004 14:05:26 -0400, "ohaya"
    > <ohaya_NO_SPAM@NO_SPAM_cox.net> wrote:
    >
    >>I was eventually able to "trick" the BIOS into display "200" (see one of
    >>those threads), but I never was able to really figure out what the BIOS was
    >>doing. Basically, what I had to do was manually change to various
    >>Frequency/PCI combinations, which would lower the lower number on the Memory
    >>Speed. Eventually, the BIOS would start showing "200" in my case.
    >>
    >>Sorry if this isn't very helpful...
    >>
    >>Jim
    >>
    >
    > Many thanks. I found your original question on 7/03/04 in this group,
    > so will read all the threads.
    >
    > My problem is a little different as in your case you were trying to go
    > down to 200, and I need to go up to 400. If I have no joy, I will buy
    > some new PC2700 memory instead, as I haven't even received the 512MB
    > of PC3200 memory I bought from crucial yesterday.
    >
    a7v8x(-x) runs memory only at sync when fsb is 333. with 266 fsb cpu you
    can run memory 266, 333 or 400MHz ddr. I still prefer pc3200 memory
    because you can probably use faster latency setting with it.
  4. Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

    On Thu, 15 Apr 2004 01:39:01 +0300, Hulttio <hulttioj@hotmail.com>
    wrote:

    >John Simon wrote:
    >> On Wed, 14 Apr 2004 14:05:26 -0400, "ohaya"
    >> <ohaya_NO_SPAM@NO_SPAM_cox.net> wrote:
    >>
    >>>I was eventually able to "trick" the BIOS into display "200" (see one of
    >>>those threads), but I never was able to really figure out what the BIOS was
    >>>doing. Basically, what I had to do was manually change to various
    >>>Frequency/PCI combinations, which would lower the lower number on the Memory
    >>>Speed. Eventually, the BIOS would start showing "200" in my case.
    >>>
    >>>Sorry if this isn't very helpful...
    >>>
    >>>Jim
    >>>
    >>
    >> Many thanks. I found your original question on 7/03/04 in this group,
    >> so will read all the threads.
    >>
    >> My problem is a little different as in your case you were trying to go
    >> down to 200, and I need to go up to 400. If I have no joy, I will buy
    >> some new PC2700 memory instead, as I haven't even received the 512MB
    >> of PC3200 memory I bought from crucial yesterday.
    >>
    >a7v8x(-x) runs memory only at sync when fsb is 333. with 266 fsb cpu you
    >can run memory 266, 333 or 400MHz ddr. I still prefer pc3200 memory
    >because you can probably use faster latency setting with it.

    After a lot of investigation, I found the same thing. As far as the
    faster latencey goes with PC3200 RAM, is that the CL value? With
    crucial, for the recommended PC3200 memory, the CL = 3, whereas the
    recommended PC2700 memory CL=2.5 - I am therefore going to return my
    512 MB of PC3200 memory (when I receive it) and get some PC2700 memory
    instead.
  5. Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

    John Simon wrote:
    > On Thu, 15 Apr 2004 01:39:01 +0300, Hulttio <hulttioj@hotmail.com>
    > wrote:
    >>a7v8x(-x) runs memory only at sync when fsb is 333. with 266 fsb cpu you
    >>can run memory 266, 333 or 400MHz ddr. I still prefer pc3200 memory
    >>because you can probably use faster latency setting with it.
    >
    >
    > After a lot of investigation, I found the same thing. As far as the
    > faster latencey goes with PC3200 RAM, is that the CL value? With
    > crucial, for the recommended PC3200 memory, the CL = 3, whereas the
    > recommended PC2700 memory CL=2.5 - I am therefore going to return my
    > 512 MB of PC3200 memory (when I receive it) and get some PC2700 memory
    > instead.
    >

    i think crucial pc3200 is cl 2.5 when runnin memory at speed 333.
  6. Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

    =|[ John Simon's ]|= wrote:

    > On Thu, 15 Apr 2004 01:39:01 +0300, Hulttio <hulttioj@hotmail.com>
    > wrote:
    >
    >>John Simon wrote:
    >>> On Wed, 14 Apr 2004 14:05:26 -0400, "ohaya"
    >>> <ohaya_NO_SPAM@NO_SPAM_cox.net> wrote:
    >>>
    >>>>I was eventually able to "trick" the BIOS into display "200" (see one of
    >>>>those threads), but I never was able to really figure out what the BIOS was
    >>>>doing. Basically, what I had to do was manually change to various
    >>>>Frequency/PCI combinations, which would lower the lower number on the Memory
    >>>>Speed. Eventually, the BIOS would start showing "200" in my case.
    >>>>
    >>>>Sorry if this isn't very helpful...
    >>>>
    >>>>Jim
    >>>>
    >>>
    >>> Many thanks. I found your original question on 7/03/04 in this group,
    >>> so will read all the threads.
    >>>
    >>> My problem is a little different as in your case you were trying to go
    >>> down to 200, and I need to go up to 400. If I have no joy, I will buy
    >>> some new PC2700 memory instead, as I haven't even received the 512MB
    >>> of PC3200 memory I bought from crucial yesterday.
    >>>
    >>a7v8x(-x) runs memory only at sync when fsb is 333. with 266 fsb cpu you
    >>can run memory 266, 333 or 400MHz ddr. I still prefer pc3200 memory
    >>because you can probably use faster latency setting with it.
    >
    > After a lot of investigation, I found the same thing. As far as the
    > faster latencey goes with PC3200 RAM, is that the CL value? With
    > crucial, for the recommended PC3200 memory, the CL = 3, whereas the
    > recommended PC2700 memory CL=2.5 - I am therefore going to return my
    > 512 MB of PC3200 memory (when I receive it) and get some PC2700 memory
    > instead.

    Theres no particular benefit of swapping the mem for *lower rated* stuff
    (dont bother:)
    Commonly pc3200 and PC2700 sold, can be indestinguishable from each other,
    PC3200 usualy just means it has been tested to run that quick (at ddr400)
    but it can run much slower too.
    Its better to get pc3200 for this board - because it can run cooler and run
    quicker timings and all other things equal, it doesnt cost much more.
    Id just use cl2.5 for it and the defaults at 333 MHz

    hth,
    --
    ' gathering moss,
    android
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