Problems with EPoX 9NDA3+ and memory

I have just installed this mobo with a A64 3200+ (939 winchester). It is a
great board but seems very finicky when it comes to memory. I know that the
Athlon 64s are more touchy on memory. I have 2x512mb sticks of Corsair XMS
3200C2 (CMX512-3200) memory and I can not run them dual channel, they are
only running at 333, and it only sees a total of 512mb of ram. These were
not a matched pair, they were bought months apart. One is v2.2 and the other
is v3.1.

I have tried changing memory settings with no luck. I have tried all the
dimm slot combinations. I have confirmed that all the dimm slots work and
that both sticks work. Even though windows sees only 512mb I can see both
sticks of the memory while in CPU-Z. If I have one stick in it runs at 200
and if 2 in at 167. I'm running the latest bios for the motherboard. These
sticks ran dual channel on an ASUS A7N8X V2 Deluxe mobo.

I have another 256mb 2700 stick of PNY memory and did some testing. It
appears that when I have a stick in dimm slot 1 and dimm slot 3 (the only
way to run non-dual channel) the system is only running the memory in dimm
slot 3: when I have the 512mb Corsair stick in dimm slot 1 and the 256mb
stick in dimm slot 3 the system only read 256mb of ram. I only have to go
into the bios to see how much memory is being read.

I'm at a loss. I know the Corsair memory is not defective because I can run
in other system (and in dual channel). There seems to be a promlem with the
memory controller in the CPU (as it is in A64) or a problem with the mobo.
Anyone out there have any ideas or know how can I can figure out if cpu or
mobo?

Please help!

Thanks!

Philip Cody wrote:

 > I have just installed this mobo with a A64 3200+ (939 winchester). It is a
 > great board but seems very finicky when it comes to memory. I know that the
 > Athlon 64s are more touchy on memory. I have 2x512mb sticks of Corsair XMS
 > 3200C2 (CMX512-3200) memory and I can not run them dual channel, they are
 > only running at 333, and it only sees a total of 512mb of ram. These were
 > not a matched pair, they were bought months apart. One is v2.2 and the other
 > is v3.1.
 >
 > I have tried changing memory settings with no luck. I have tried all the
 > dimm slot combinations. I have confirmed that all the dimm slots work and
 > that both sticks work. Even though windows sees only 512mb I can see both
 > sticks of the memory while in CPU-Z. If I have one stick in it runs at 200
 > and if 2 in at 167. I'm running the latest bios for the motherboard. These
 > sticks ran dual channel on an ASUS A7N8X V2 Deluxe mobo.
 >
 > I have another 256mb 2700 stick of PNY memory and did some testing. It
 > appears that when I have a stick in dimm slot 1 and dimm slot 3 (the only
 > way to run non-dual channel) the system is only running the memory in dimm
 > slot 3: when I have the 512mb Corsair stick in dimm slot 1 and the 256mb
 > stick in dimm slot 3 the system only read 256mb of ram. I only have to go
 > into the bios to see how much memory is being read.
 >
 > I'm at a loss. I know the Corsair memory is not defective because I can run
 > in other system (and in dual channel). There seems to be a promlem with the
 > memory controller in the CPU (as it is in A64) or a problem with the mobo.
 > Anyone out there have any ideas or know how can I can figure out if cpu or
 > mobo?
 >
 > Please help!
 >
 > Thanks!
 >
 >
I know you said you tried all combinations but just to be sure- put them
in slots three and four. Then when you boot up - do you get the full
gigabyte in the bios post screen?

#2 have you updated the bios on your motherboard? I know there were some
memory issues early on with the +

<a style='text-decoration: underline;' href="http://www.epox.com/USA/article.asp?ID=1824&showsupportlinks=YES" target="_blank">http://www.epox.com/USA/article.asp?ID=1824&showsupportlinks=YES</a>

I beleive your memory is in that list.<!-- ~MESSAGE_AFTER~ -->