new memory no go

hi all,

i have an asus a7v600 mobo (c. 2003 - socket a - AMD xp3000+ processor) with the via kt600 chipset, flashed to the latest bios (1008).

it has three double data rate dimm sockets.

i formerly had 2 512mb pc2100 ddr dimms (i can't determine the brand) in sockets 1 and 3 (if i tried any other permutation, all i got on boot up was the post code for no or bad memory)

i decided to upgrade my memory, so i went out a bought 2 1gb pc3200 dimms.

i removed the old memory, and popped the new stuff in.

but it won't work...unless it's a single DIMM in socket 3.

i tried every permutation:

DIMMS in 1-3
DIMMS in 1-2
DIMMS in 2-3

i tried all those again after reducing the memory speed from auto (which I think is 400) to 333. once again, no go unless i just had one DIMM in socket 3.

now on the asus site, in the troubleshooting section, there's post (in stilted english) that states the a7v600 supports 2 1gb sticks of DDR PC3200. my mobo manual, though, has a table with a few brands of memory on it, including samsung (which is the new stuff i bought), but only up to 512. that table is titled DDR 400 one DIMM support only. there's another table called DDR 400 two DIMM support only, which has 4 more brands of ram (once again, only up to 512mb).

i also found a document on-line for socket 754 mobo (the replacement for the socket a) that ran a down a bunch of memory permutations for that board. in it, it talks about 2 different types of ddr ram dimms: x8 single rank or x16 and x8 double rank.

so i have two questions:
1) as per above, which type of ram do i have (my samsung sticks have 8 chips aside); on the chips the number is k4h510838d; on a sticker on the stick the number is m368l2923dun-ccc?
2) does anyone know any more tricks i haven't tried (since my next step is taking the DIMM back and spending the money on something more worthwhile...like the world of warcraft expansion...hehehehe).

sorry for the long post, but i'm a little frustrated!

thanks!

steve

o1die,

thx for your reply.

when i was messing around with memory speed, i just decreased it to 333 under the advanced menu. i didn't mess with the settings under chip configuration (mainly because i was too afraid to) which included:sdram 1t command control, sdram cas latency, sdram ras to cas delay, sdram ras precharge delay, sdram active precharge delay, sdram bank interleave, dram burst length 8qw, or rank interleave.

should i mess with those and how?

thx again!

steve

so guys then, near as i can understand, change to manual, then bump the memory timing to 2T (?) - i've already tried just leaving it at [by spd] evongugg...

that being said, do i have to worry about stuff like:
-sdram cas latency
-sdram ras to cas delay
-sdram ras precharge delay
-sdram active precharge delay
-sdram bank interleave
-dram burst length 8qw
-rank interleave

thx, guys...i really appreciate the help.

steve