M2N-MX SE PLUS with 1+1Gb Kingston DD2 800Mhz

Hi, sorry for my english
I have this Asus motherboard M2N-MX SE PLUS
and 1+1 Gb Kingston DD2 800 Mhz modello KVR800D2N5/1G

Setting in bios DRAM Timing Configuration, the Memclock value:
at 200, ram run at 400 Mhz.
at 266, pc don't boot, black screen, need clear-bios.
at 333, ram run at 667 Mhz.
at 400, pc don't boot, black screen, need clear-bios.
at 533, pc don't boot, black screen, need clear-bios.

My questions:

1 - How to setup ram to run at 800 Mhz?

2 - I've read in some posts that is conveniet to install DD2 800 and
set them at 667? Is this real?

Thank you

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:47d55a93$0$19247$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
> spodosaurus wrote:
>> santarcangelo@gmail.com wrote:
>>> Hi, sorry for my english
>>> I have this Asus motherboard M2N-MX SE PLUS
>>> and 1+1 Gb Kingston DD2 800 Mhz modello KVR800D2N5/1G
>>>
>>> Setting in bios DRAM Timing Configuration, the Memclock value:
>>> at 200, ram run at 400 Mhz.
>>> at 266, pc don't boot, black screen, need clear-bios.
>>> at 333, ram run at 667 Mhz.
>>> at 400, pc don't boot, black screen, need clear-bios.
>>> at 533, pc don't boot, black screen, need clear-bios.
>>>
>>> My questions:
>>>
>>> 1 - How to setup ram to run at 800 Mhz?
>>>
>>> 2 - I've read in some posts that is conveniet to install DD2 800 and
>>> set them at 667? Is this real?
>>>
>>> Thank you
>>
>> 200 is the correct setting!
>
> and 400 for the system bus.
>
> Remember, it's double pumped (right? I'm asking here...) so it's handling
> twice the data per cycle... yes?
>
>>
>> http://en.wikipedia.org/wiki/DDR2_SDRAM
>>
>> Ari
>>

FWIW, this is an AMD AM2 MB supporting, among others, Athlon 64 X2 cpus.
The memory bus will only run at 800MHz for cpus running at integer multiples
of 4. Specifically, 1.6GHz, 2.0GHx, 2.4, 2.8, 3.2 etc.

From: http://www.hardwaresecrets.com/article/328

"The memory controller integrated on AM2 CPUs can support DDR2-533, DDR2-667
and DDR2-800 memories. The problem, however, is how the memory bus clock is
achieved. Instead of being generated thru the CPU base clock (HTT clock,
which is of 200 MHz), it divides the CPU internal clock. The value of this
divider is half the value of the CPU multiplier."

And...

"Here are some examples:CPU Internal Clock
CPU Multiplier
Memory Divider
Memory Bus

2.8 GHz
14x
7
800 MHz

2.6 GHz
13x
7
742 MHz

2.4 GHz
12x
6
800 MHz

2.2 GHz
11x
6
733 MHz

2 GHz
10x
5
800 MHz

1.8 GHz
9x
5
720 MHz

1.6 GHz
8x
4
800 MHz

santarcangelo@gmail.com wrote:
> Hi, sorry for my english
> I have this Asus motherboard M2N-MX SE PLUS
> and 1+1 Gb Kingston DD2 800 Mhz modello KVR800D2N5/1G
>
> Setting in bios DRAM Timing Configuration, the Memclock value:
> at 200, ram run at 400 Mhz.
> at 266, pc don't boot, black screen, need clear-bios.
> at 333, ram run at 667 Mhz.
> at 400, pc don't boot, black screen, need clear-bios.
> at 533, pc don't boot, black screen, need clear-bios.
>
> My questions:
>
> 1 - How to setup ram to run at 800 Mhz?
>
> 2 - I've read in some posts that is conveniet to install DD2 800 and
> set them at 667? Is this real?
>
> Thank you

200 is the correct setting!

http://en.wikipedia.org/wiki/DDR2_SDRAM

Ari

--
spammage trappage: remove the underscores to reply
Many people around the world are waiting for a marrow transplant. Please
volunteer to be a marrow donor and literally save someone's life:
http://www.abmdr.org.au/
http://www.marrow.org/

spodosaurus wrote:
> santarcangelo@gmail.com wrote:
>> Hi, sorry for my english
>> I have this Asus motherboard M2N-MX SE PLUS
>> and 1+1 Gb Kingston DD2 800 Mhz modello KVR800D2N5/1G
>>
>> Setting in bios DRAM Timing Configuration, the Memclock value:
>> at 200, ram run at 400 Mhz.
>> at 266, pc don't boot, black screen, need clear-bios.
>> at 333, ram run at 667 Mhz.
>> at 400, pc don't boot, black screen, need clear-bios.
>> at 533, pc don't boot, black screen, need clear-bios.
>>
>> My questions:
>>
>> 1 - How to setup ram to run at 800 Mhz?
>>
>> 2 - I've read in some posts that is conveniet to install DD2 800 and
>> set them at 667? Is this real?
>>
>> Thank you
>
> 200 is the correct setting!

and 400 for the system bus.

Remember, it's double pumped (right? I'm asking here...) so it's
handling twice the data per cycle... yes?

>
> http://en.wikipedia.org/wiki/DDR2_SDRAM
>
> Ari
>


--
spammage trappage: remove the underscores to reply
Many people around the world are waiting for a marrow transplant. Please
volunteer to be a marrow donor and literally save someone's life:
http://www.abmdr.org.au/
http://www.marrow.org/