Pantz wrote:
> hello everyone , not sure if this is the right place to post my
> question, but here goes,
> i have just built a new system AMD quad 4, 3.0 and a gigabyte
> GA-MA790GP MB
> and 4gigs corsair DDR2 PC8500 (1066mhz) ram 2, 2gigs sticks, the MD has
> channel 0 DDR2_1 , DDR2_3 ORANGE socket
> channel 1 DDR2_2 , DDR2_4 RED socket
> it also says " if two memory modules are to be installed it is
> recomended that you install them in DDR2_1 and DDR2_2 " , ( one stick
> in channel 0 and one stick in channel 1 )
> it then goes on to say " when enabling dual channel mode with 2 or more
> 4 DDR2 memory modules they should be installed in the same colored
> sockets, i have both mine installed in Channel 0 orange socket
> the BIOS see 4 gigs of ram running @ 800mhz, ("ungangged" ) when the
> memory is rated for 1066mhz
> the system is running very stable so i am not sure if i should change
> anything but i would like the memory to run at 1066 if possible , ( i
> payed for 1066mhz) , also, i dont quite understand " gangged vs
> ungangged ' BIOS sees ungangged at the moment ,
> thanks in advance for any suggestions
>
>
Ganged versus unganged compared.
http://ixbtlabs.com/articles3/cpu/am...ganged-p1.html
Unganged means the channels are independent, and the processor can
access them separately. Ganged is the traditional dual channel mode.
Using 2x2GB sticks, should allow DDR2-1066 operation. Using four
sticks, the processor is not guaranteed to achieve that rate,
which is why DDR2-800 is the more likely automatic setting
in that case. It is not a motherboard issue, but a statement
made by AMD themselves.
If you want DDR2-1066 operation, then use a maximum of two sticks of RAM.
Use the "memory clock" setting, to change to "X5.33" as seen in your manual
for an AM2+ processor. That should give 1066, as near as I can tell.
If the memory has something like EPP, it may actually set the rest of the
relevant settings by itself automatically. Otherwise, they might have to
be set manually, if they're not stored in the SPD chip on the DIMM.
http://www.corsair.com/_datasheets/T...96-8500C5D.pdf
If your memory product has timings, like 5-5-5-15, then enter them in
the Timing section (tCAS, tRCD, tRP, tRAS).
Adjust Vdimm ("DDR2 Voltage Control") to the value recommended on the
memory packaging. "DDR2 Voltage Control" [+0.30] would give 1.80 + 0.30 = 2.1V
which is the recommended value. Test the memory, then decrease the voltage
setting a step at a time, until the memory is unstable. Only use
as much Vdimm voltage, as is needed for perfectly stable operation.
That enhances the life of the memory. A program like Prime95, is a
good test of stability. It should run for at least four
hours, without detecting an error.
http://majorgeeks.com/Prime95_d4363.html
Other newsgroups for hardware questions...
alt.comp.hardware
alt.comp.periphs.mainboard.gigabyte
or if all else fails
microsoft.public.windowsxp.hardware
HTH,
Paul
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