P5N32-E SLI memory problems! help ASAP pls, going mad

my config is the fallowing:
p5n32-e sli 680i chipset (bios 1103 release version)
a-data vitesta extreme 800+ (4-4-4-12 2T, 2.025v, 800mHz, 4x1gb)
q6600 (stock speed + AC freezer 7 PRO)
asus 8800gts 330mb/320bit (stock speeds)
antec basiq power 500W
1x WD 320 s-ata 16mb
asus dvd-writer s-ata
OS Win Vista x64

I cannot install 4gb of ram on my mobo ... reason unknow so far :|
i prolly tryed everything possible... loosing the timings, increasing volts, installing vista with 3gb and then putting anoather 1gb in, what else ?does anyone had the same problems im going through?what is ur opinion ?

I would check the manual for your mobo. p5n32-e has had many problems as you can read from newegg.com http://www.newegg.com/Product/Prod [...] 6813131073 id contact asus for tech support. Then play the waiting game. Always fun!

Yeah I have the same motherboard, there has been alot of problems with ram and this mobo, there is a document on the asus website listing supported ram for the mobo. my g-skill isn't listed but thank goodness it worked for me with 4-4-4-12 timings.

thanks for the comment m8, but i don't really wanna change the DIMMS only if its the only solution ... im also looking to change my mb since this one has some problems... but who know's maybe i can figure what the problem is ^^

I ahve the ADATA 667Mhx ram (4gb - 2x2) and the P5N32-E SLI Plus board and a E6300 core 2 duo.

Initially I had random lockups and issues until I changed the following settings

LTD Frequency 5x (changed from 4x)
FSB to unlinked (changed from Linked)

hope this helps.